[svn-r25900] HDFFV-9046: reorganize hdf5/perform/ directory

Moved perform/ to tools/perform. Updated all the configure related files for the new location.

Tested: h5committested plus tested in jam and kite.

32 files changed, 15545 insertions, 2 deletions

diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index a9a8c49..2365326 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -44,3 +44,6 @@ add_subdirectory (${HDF5_TOOLS_SOURCE_DIR}/h5stat)
 
 #-- Add the h5dump and test executables
 add_subdirectory (${HDF5_TOOLS_SOURCE_DIR}/h5dump)
+
+#-- Add the perform and test executables
+add_subdirectory (${HDF5_TOOLS_SOURCE_DIR}/perform)
diff --git a/tools/Makefile.am b/tools/Makefile.am
index 76b32d2..095cc30 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -24,6 +24,7 @@ include $(top_srcdir)/config/commence.am
 CONFIG=ordered
 
 # All subdirectories
-SUBDIRS=lib h5diff h5ls h5dump misc h5import h5repack h5jam h5copy h5stat
+SUBDIRS=lib h5diff h5ls h5dump misc h5import h5repack h5jam h5copy h5stat \
+    perform
 
 include $(top_srcdir)/config/conclude.am
diff --git a/tools/Makefile.in b/tools/Makefile.in
index 0b0e2d0..c4bf941 100644
--- a/tools/Makefile.in
+++ b/tools/Makefile.in
@@ -667,7 +667,9 @@ CHECK_CLEANFILES = *.chkexe *.chklog *.clog
 CONFIG = ordered
 
 # All subdirectories
-SUBDIRS = lib h5diff h5ls h5dump misc h5import h5repack h5jam h5copy h5stat
+SUBDIRS = lib h5diff h5ls h5dump misc h5import h5repack h5jam h5copy h5stat \
+    perform
+
 
 # Automake needs to be taught how to build lib, progs, and tests targets.
 # These will be filled in automatically for the most part (e.g.,
diff --git a/tools/perform/CMakeLists.txt b/tools/perform/CMakeLists.txt
new file mode 100644
index 0000000..6887c60
--- /dev/null
+++ b/tools/perform/CMakeLists.txt
@@ -0,0 +1,140 @@
+cmake_minimum_required (VERSION 2.8.11)
+PROJECT (HDF5_PERFORM )
+
+#-----------------------------------------------------------------------------
+# Apply Definitions to compiler in this directory and below
+#-----------------------------------------------------------------------------
+add_definitions (${HDF_EXTRA_C_FLAGS})
+
+#-----------------------------------------------------------------------------
+# Setup include Directories
+#-----------------------------------------------------------------------------
+INCLUDE_DIRECTORIES (${HDF5_TEST_SRC_DIR})
+INCLUDE_DIRECTORIES (${HDF5_TOOLS_SRC_DIR}/lib )
+
+# --------------------------------------------------------------------
+# Add the executables
+# --------------------------------------------------------------------
+#-- Adding test for h5perf_serial
+set (h5perf_serial_SRCS
+    ${HDF5_PERFORM_SOURCE_DIR}/sio_timer.c
+    ${HDF5_PERFORM_SOURCE_DIR}/sio_perf.c
+    ${HDF5_PERFORM_SOURCE_DIR}/sio_engine.c
+)
+add_executable (h5perf_serial ${h5perf_serial_SRCS})
+TARGET_NAMING (h5perf_serial ${LIB_TYPE})
+TARGET_C_PROPERTIES (h5perf_serial " " " ")
+target_link_libraries (h5perf_serial ${HDF5_LIB_TARGET} ${HDF5_TOOLS_LIB_TARGET})
+set_target_properties (h5perf_serial PROPERTIES FOLDER perform)
+
+if (HDF5_BUILD_PERFORM_STANDALONE)
+  #-- Adding test for h5perf_serial_alone
+  set (h5perf_serial_alone_SRCS
+      ${HDF5_PERFORM_SOURCE_DIR}/sio_timer.c
+      ${HDF5_PERFORM_SOURCE_DIR}/sio_perf.c
+      ${HDF5_PERFORM_SOURCE_DIR}/sio_engine.c
+  )
+  add_executable (h5perf_serial_alone ${h5perf_serial_alone_SRCS})
+  set_property (TARGET h5perf_serial_alone 
+      APPEND PROPERTY COMPILE_DEFINITIONS STANDALONE
+  )
+  TARGET_NAMING (h5perf_serial_alone ${LIB_TYPE})
+  TARGET_C_PROPERTIES (h5perf_serial_alone " " " ")
+  target_link_libraries (h5perf_serial_alone ${HDF5_LIB_TARGET} ${HDF5_TOOLS_LIB_TARGET})
+  set_target_properties (h5perf_serial_alone PROPERTIES FOLDER perform)
+endif (HDF5_BUILD_PERFORM_STANDALONE)
+
+#-- Adding test for chunk
+set (chunk_SRCS
+    ${HDF5_PERFORM_SOURCE_DIR}/chunk.c
+)
+ADD_EXECUTABLE(chunk ${chunk_SRCS})
+TARGET_NAMING (chunk ${LIB_TYPE})
+TARGET_C_PROPERTIES (chunk " " " ")
+TARGET_LINK_LIBRARIES(chunk ${HDF5_LIB_TARGET} ${HDF5_TOOLS_LIB_TARGET})
+set_target_properties (chunk PROPERTIES FOLDER perform)
+
+#-- Adding test for iopipe
+set (iopipe_SRCS
+    ${HDF5_PERFORM_SOURCE_DIR}/iopipe.c
+)
+add_executable (iopipe ${iopipe_SRCS})
+TARGET_NAMING (iopipe ${LIB_TYPE})
+TARGET_C_PROPERTIES (iopipe " " " ")
+target_link_libraries (iopipe ${HDF5_LIB_TARGET} ${HDF5_TOOLS_LIB_TARGET})
+set_target_properties (iopipe PROPERTIES FOLDER perform)
+
+#-- Adding test for overhead
+set (overhead_SRCS
+    ${HDF5_PERFORM_SOURCE_DIR}/overhead.c
+)
+add_executable (overhead ${overhead_SRCS})
+TARGET_NAMING (overhead ${LIB_TYPE})
+TARGET_C_PROPERTIES (overhead " " " ")
+target_link_libraries (overhead ${HDF5_LIB_TARGET} ${HDF5_TOOLS_LIB_TARGET})
+set_target_properties (overhead PROPERTIES FOLDER perform)
+
+#-- Adding test for perf_meta
+set (perf_meta_SRCS
+    ${HDF5_PERFORM_SOURCE_DIR}/perf_meta.c
+)
+add_executable (perf_meta ${perf_meta_SRCS})
+TARGET_NAMING (perf_meta ${LIB_TYPE})
+TARGET_C_PROPERTIES (perf_meta " " " ")
+target_link_libraries (perf_meta ${HDF5_LIB_TARGET} ${HDF5_TOOLS_LIB_TARGET} ${HDF5_TEST_LIB_TARGET})
+set_target_properties (perf_meta PROPERTIES FOLDER perform)
+
+#-- Adding test for zip_perf
+set (zip_perf_SRCS
+    ${HDF5_PERFORM_SOURCE_DIR}/zip_perf.c
+)
+add_executable (zip_perf ${zip_perf_SRCS})
+TARGET_NAMING (zip_perf ${LIB_TYPE})
+TARGET_C_PROPERTIES (zip_perf " " " ")
+target_link_libraries (zip_perf ${HDF5_TOOLS_LIB_TARGET} ${HDF5_LIB_TARGET})
+set_target_properties (zip_perf PROPERTIES FOLDER perform)
+
+if (H5_HAVE_PARALLEL)
+  #-- Adding test for h5perf
+  set (h5perf_SRCS
+      ${HDF5_PERFORM_SOURCE_DIR}/pio_timer.c
+      ${HDF5_PERFORM_SOURCE_DIR}/pio_perf.c
+      ${HDF5_PERFORM_SOURCE_DIR}/pio_engine.c
+  )
+  add_executable (h5perf ${h5perf_SRCS})
+  TARGET_NAMING (h5perf ${LIB_TYPE})
+  TARGET_C_PROPERTIES (h5perf " " " ")
+  target_link_libraries (h5perf ${HDF5_LIB_TARGET} ${HDF5_TOOLS_LIB_TARGET} ${HDF5_TEST_LIB_TARGET})
+  set_target_properties (h5perf PROPERTIES FOLDER perform)
+
+  if (HDF5_BUILD_PERFORM_STANDALONE)
+    #-- Adding test for h5perf
+    set (h5perf_alone_SRCS
+        ${HDF5_PERFORM_SOURCE_DIR}/pio_timer.c
+        ${HDF5_PERFORM_SOURCE_DIR}/pio_perf.c
+        ${HDF5_PERFORM_SOURCE_DIR}/pio_engine.c
+    )
+    add_executable (h5perf_alone ${h5perf_alone_SRCS})
+    set_property (TARGET h5perf_alone 
+        APPEND PROPERTY COMPILE_DEFINITIONS STANDALONE
+    )
+    TARGET_NAMING (h5perf_alone ${LIB_TYPE})
+    TARGET_C_PROPERTIES (h5perf_alone " " " ")
+    target_link_libraries (h5perf_alone ${HDF5_LIB_TARGET} ${HDF5_TOOLS_LIB_TARGET} ${HDF5_TEST_LIB_TARGET})
+    set_target_properties (h5perf_alone PROPERTIES FOLDER perform)
+  endif (HDF5_BUILD_PERFORM_STANDALONE)
+
+  if (HDF5_BUILD_PARALLEL_ALL)
+    #-- Adding test for benchpar
+    set (benchpar_SRCS
+        ${HDF5_PERFORM_SOURCE_DIR}/benchpar.c
+    )
+    add_executable (benchpar ${benchpar_SRCS})
+    TARGET_NAMING (benchpar ${LIB_TYPE})
+    TARGET_C_PROPERTIES (benchpar " " " ")
+    target_link_libraries (benchpar ${HDF5_LIB_TARGET} ${HDF5_TOOLS_LIB_TARGET} ${HDF5_TEST_LIB_TARGET})
+    set_target_properties (benchpar PROPERTIES FOLDER perform)
+  endif (HDF5_BUILD_PARALLEL_ALL)
+endif (H5_HAVE_PARALLEL)
+
+include (CMakeTests.cmake)
diff --git a/tools/perform/CMakeTests.cmake b/tools/perform/CMakeTests.cmake
new file mode 100644
index 0000000..74055d5
--- /dev/null
+++ b/tools/perform/CMakeTests.cmake
@@ -0,0 +1,62 @@
+
+##############################################################################
+##############################################################################
+###           T E S T I N G                                                ###
+##############################################################################
+##############################################################################
+
+add_custom_command (
+    TARGET     zip_perf
+    POST_BUILD
+    COMMAND    ${CMAKE_COMMAND}
+    ARGS       -E copy_if_different ${HDF5_TOOLS_SRC_DIR}/testfiles/tfilters.h5 ${PROJECT_BINARY_DIR}/tfilters.h5
+)
+
+#-----------------------------------------------------------------------------
+# Add Tests
+#-----------------------------------------------------------------------------
+
+# Remove any output file left over from previous test run
+add_test (
+    NAME PERFORM_h5perform-clear-objects
+    COMMAND    ${CMAKE_COMMAND}
+        -E remove 
+        chunk.h5
+        iopipe.h5
+        iopipe.raw
+        x-diag-rd.dat
+        x-diag-wr.dat
+        x-rowmaj-rd.dat
+        x-rowmaj-wr.dat
+        x-gnuplot
+)
+
+add_test (NAME PERFORM_h5perf_serial COMMAND $<TARGET_FILE:h5perf_serial>)
+set_tests_properties (PERFORM_h5perf_serial PROPERTIES TIMEOUT 1800)
+
+if (HDF5_BUILD_PERFORM_STANDALONE)
+  add_test (NAME PERFORM_h5perf_serial_alone COMMAND $<TARGET_FILE:h5perf_serial_alone>)
+endif (HDF5_BUILD_PERFORM_STANDALONE)
+
+add_test (NAME PERFORM_chunk COMMAND $<TARGET_FILE:chunk>)
+
+add_test (NAME PERFORM_iopipe COMMAND $<TARGET_FILE:iopipe>)
+
+add_test (NAME PERFORM_overhead COMMAND $<TARGET_FILE:overhead>)
+
+add_test (NAME PERFORM_perf_meta COMMAND $<TARGET_FILE:perf_meta>)
+
+add_test (NAME PERFORM_zip_perf_help COMMAND $<TARGET_FILE:zip_perf> "-h")
+add_test (NAME PERFORM_zip_perf COMMAND $<TARGET_FILE:zip_perf> tfilters.h5)
+
+if (H5_HAVE_PARALLEL)
+  add_test (NAME PERFORM_h5perf COMMAND ${MPIEXEC} ${MPIEXEC_PREFLAGS} ${MPIEXEC_NUMPROC_FLAG} ${MPIEXEC_MAX_NUMPROCS} ${MPIEXEC_POSTFLAGS} $<TARGET_FILE:h5perf>)
+
+  if (HDF5_BUILD_PERFORM_STANDALONE)
+    add_test (NAME PERFORM_h5perf_alone COMMAND ${MPIEXEC} ${MPIEXEC_PREFLAGS} ${MPIEXEC_NUMPROC_FLAG} ${MPIEXEC_MAX_NUMPROCS} ${MPIEXEC_POSTFLAGS} $<TARGET_FILE:h5perf_alone>)
+  endif (HDF5_BUILD_PERFORM_STANDALONE)
+
+  if (HDF5_BUILD_PARALLEL_ALL)
+    add_test (NAME PERFORM_benchpar COMMAND ${MPIEXEC} ${MPIEXEC_PREFLAGS} ${MPIEXEC_NUMPROC_FLAG} ${MPIEXEC_MAX_NUMPROCS} ${MPIEXEC_POSTFLAGS} $<TARGET_FILE:benchpar>)
+  endif (HDF5_BUILD_PARALLEL_ALL)
+endif (H5_HAVE_PARALLEL)
diff --git a/tools/perform/COPYING b/tools/perform/COPYING
new file mode 100644
index 0000000..6903daf
--- /dev/null
+++ b/tools/perform/COPYING
@@ -0,0 +1,16 @@
+
+  Copyright by  The HDF Group and 
+                The Board of Trustees of the University of Illinois. 
+  All rights reserved. 
+
+  The files and subdirectories in this directory are part of HDF5.  
+  The full HDF5 copyright notice, including terms governing use, 
+  modification, and redistribution, is contained in the files COPYING 
+  and Copyright.html.  COPYING can be found at the root of the source 
+  code distribution tree; Copyright.html can be found at the root 
+  level of an installed copy of the electronic HDF5 document set and 
+  is linked from the top-level documents page.  It can also be found 
+  at http://www.hdfgroup.org/HDF5/doc/Copyright.html.  If you do not 
+  have access to either file, you may request a copy from 
+  help@hdfgroup.org. 
+
diff --git a/tools/perform/Makefile.am b/tools/perform/Makefile.am
new file mode 100644
index 0000000..59c598a
--- /dev/null
+++ b/tools/perform/Makefile.am
@@ -0,0 +1,79 @@
+#
+# Copyright by The HDF Group.
+# Copyright by the Board of Trustees of the University of Illinois.
+# All rights reserved.
+#
+# This file is part of HDF5.  The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the files COPYING and Copyright.html.  COPYING can be found at the root
+# of the source code distribution tree; Copyright.html can be found at the
+# root level of an installed copy of the electronic HDF5 document set and
+# is linked from the top-level documents page.  It can also be found at
+# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have
+# access to either file, you may request a copy from help@hdfgroup.org.
+##
+## Makefile.am
+## Run automake to generate a Makefile.in from this file.
+##
+#
+# HDF5 Library Performance Makefile(.in)
+#
+
+include $(top_srcdir)/config/commence.am
+
+AM_CPPFLAGS+=-I$(top_srcdir)/src -I$(top_srcdir)/test -I$(top_srcdir)/tools/lib
+
+# bin_PROGRAMS will be installed.
+if BUILD_PARALLEL_CONDITIONAL
+    bin_PROGRAMS=h5perf_serial h5perf
+else
+    bin_PROGRAMS=h5perf_serial
+endif
+
+# Add h5perf and h5perf_serial specific linker flags here
+h5perf_LDFLAGS = $(LT_STATIC_EXEC) $(AM_LDFLAGS)
+h5perf_serial_LDFLAGS = $(LT_STATIC_EXEC) $(AM_LDFLAGS)
+
+# Some programs are not built or run by default, but can be built by hand or by
+# specifying --enable-build-all at configure time.
+# Also, some of these programs should only be built in parallel.
+# Currently there is no such program.
+if BUILD_PARALLEL_CONDITIONAL
+    PARA_BUILD_ALL=
+endif
+if BUILD_ALL_CONDITIONAL
+    BUILD_ALL_PROGS=$(PARA_BUILD_ALL)
+endif
+
+# Define programs that will be run in 'make check'
+# List them in the order they should be run.
+# Parallel test programs.
+if BUILD_PARALLEL_CONDITIONAL
+    TEST_PROG_PARA=h5perf perf
+endif
+# Serial test programs.
+TEST_PROG = iopipe chunk overhead zip_perf perf_meta h5perf_serial $(BUILD_ALL_PROGS)
+
+# check_PROGRAMS will be built but not installed.  Do not any executable
+# that is in bin_PROGRAMS already. Otherwise, it will be removed twice in
+# "make clean" and some systems, e.g., AIX, do not like it.
+check_PROGRAMS= iopipe chunk overhead zip_perf perf_meta $(BUILD_ALL_PROGS) perf
+
+h5perf_SOURCES=pio_perf.c pio_engine.c pio_timer.c
+h5perf_serial_SOURCES=sio_perf.c sio_engine.c sio_timer.c
+
+# These are the files that `make clean' (and derivatives) will remove from
+# this directory.
+CLEANFILES=*.h5 *.raw *.dat x-gnuplot perftest.out
+
+# All of the programs depend on the main hdf5 library, and some of them
+# depend on test or tools library.
+LDADD=$(LIBHDF5)
+h5perf_LDADD=$(LIBH5TOOLS) $(LIBH5TEST) $(LIBHDF5)
+h5perf_serial_LDADD=$(LIBH5TOOLS) $(LIBH5TEST) $(LIBHDF5)
+perf_LDADD=$(LIBH5TEST) $(LIBHDF5)
+iopipe_LDADD=$(LIBH5TEST) $(LIBHDF5)
+zip_perf_LDADD=$(LIBH5TOOLS) $(LIBH5TEST) $(LIBHDF5)
+perf_meta_LDADD=$(LIBH5TEST) $(LIBHDF5)
+
+include $(top_srcdir)/config/conclude.am
diff --git a/tools/perform/Makefile.in b/tools/perform/Makefile.in
new file mode 100644
index 0000000..1244e27
--- /dev/null
+++ b/tools/perform/Makefile.in
@@ -0,0 +1,1544 @@
+# Makefile.in generated by automake 1.14.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2013 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+#
+# Copyright by The HDF Group.
+# Copyright by the Board of Trustees of the University of Illinois.
+# All rights reserved.
+#
+# This file is part of HDF5.  The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the files COPYING and Copyright.html.  COPYING can be found at the root
+# of the source code distribution tree; Copyright.html can be found at the
+# root level of an installed copy of the electronic HDF5 document set and
+# is linked from the top-level documents page.  It can also be found at
+# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have
+# access to either file, you may request a copy from help@hdfgroup.org.
+#
+# HDF5 Library Performance Makefile(.in)
+#
+
+VPATH = @srcdir@
+am__is_gnu_make = test -n '$(MAKEFILE_LIST)' && test -n '$(MAKELEVEL)'
+am__make_running_with_option = \
+  case $${target_option-} in \
+      ?) ;; \
+      *) echo "am__make_running_with_option: internal error: invalid" \
+              "target option '$${target_option-}' specified" >&2; \
+         exit 1;; \
+  esac; \
+  has_opt=no; \
+  sane_makeflags=$$MAKEFLAGS; \
+  if $(am__is_gnu_make); then \
+    sane_makeflags=$$MFLAGS; \
+  else \
+    case $$MAKEFLAGS in \
+      *\\[\ \	]*) \
+        bs=\\; \
+        sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+          | sed "s/$$bs$$bs[$$bs $$bs	]*//g"`;; \
+    esac; \
+  fi; \
+  skip_next=no; \
+  strip_trailopt () \
+  { \
+    flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+  }; \
+  for flg in $$sane_makeflags; do \
+    test $$skip_next = yes && { skip_next=no; continue; }; \
+    case $$flg in \
+      *=*|--*) continue;; \
+        -*I) strip_trailopt 'I'; skip_next=yes;; \
+      -*I?*) strip_trailopt 'I';; \
+        -*O) strip_trailopt 'O'; skip_next=yes;; \
+      -*O?*) strip_trailopt 'O';; \
+        -*l) strip_trailopt 'l'; skip_next=yes;; \
+      -*l?*) strip_trailopt 'l';; \
+      -[dEDm]) skip_next=yes;; \
+      -[JT]) skip_next=yes;; \
+    esac; \
+    case $$flg in \
+      *$$target_option*) has_opt=yes; break;; \
+    esac; \
+  done; \
+  test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
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+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+DIST_COMMON = $(top_srcdir)/config/commence.am \
+	$(top_srcdir)/config/conclude.am $(srcdir)/Makefile.in \
+	$(srcdir)/Makefile.am $(top_srcdir)/bin/mkinstalldirs \
+	$(top_srcdir)/bin/depcomp $(top_srcdir)/bin/test-driver \
+	COPYING
+@BUILD_PARALLEL_CONDITIONAL_FALSE@bin_PROGRAMS =  \
+@BUILD_PARALLEL_CONDITIONAL_FALSE@	h5perf_serial$(EXEEXT)
+@BUILD_PARALLEL_CONDITIONAL_TRUE@bin_PROGRAMS =  \
+@BUILD_PARALLEL_CONDITIONAL_TRUE@	h5perf_serial$(EXEEXT) \
+@BUILD_PARALLEL_CONDITIONAL_TRUE@	h5perf$(EXEEXT)
+check_PROGRAMS = iopipe$(EXEEXT) chunk$(EXEEXT) overhead$(EXEEXT) \
+	zip_perf$(EXEEXT) perf_meta$(EXEEXT) $(am__EXEEXT_2) \
+	perf$(EXEEXT)
+TESTS = $(am__EXEEXT_3)
+subdir = tools/perform
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/configure.ac
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+mkinstalldirs = $(SHELL) $(top_srcdir)/bin/mkinstalldirs
+CONFIG_HEADER = $(top_builddir)/src/H5config.h
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+am__installdirs = "$(DESTDIR)$(bindir)"
+am__EXEEXT_1 =
+@BUILD_ALL_CONDITIONAL_TRUE@am__EXEEXT_2 = $(am__EXEEXT_1)
+PROGRAMS = $(bin_PROGRAMS)
+chunk_SOURCES = chunk.c
+chunk_OBJECTS = chunk.$(OBJEXT)
+chunk_LDADD = $(LDADD)
+chunk_DEPENDENCIES = $(LIBHDF5)
+AM_V_lt = $(am__v_lt_@AM_V@)
+am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
+am__v_lt_0 = --silent
+am__v_lt_1 = 
+am_h5perf_OBJECTS = pio_perf.$(OBJEXT) pio_engine.$(OBJEXT) \
+	pio_timer.$(OBJEXT)
+h5perf_OBJECTS = $(am_h5perf_OBJECTS)
+h5perf_DEPENDENCIES = $(LIBH5TOOLS) $(LIBH5TEST) $(LIBHDF5)
+h5perf_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
+	$(h5perf_LDFLAGS) $(LDFLAGS) -o $@
+am_h5perf_serial_OBJECTS = sio_perf.$(OBJEXT) sio_engine.$(OBJEXT) \
+	sio_timer.$(OBJEXT)
+h5perf_serial_OBJECTS = $(am_h5perf_serial_OBJECTS)
+h5perf_serial_DEPENDENCIES = $(LIBH5TOOLS) $(LIBH5TEST) $(LIBHDF5)
+h5perf_serial_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
+	$(h5perf_serial_LDFLAGS) $(LDFLAGS) -o $@
+iopipe_SOURCES = iopipe.c
+iopipe_OBJECTS = iopipe.$(OBJEXT)
+iopipe_DEPENDENCIES = $(LIBH5TEST) $(LIBHDF5)
+overhead_SOURCES = overhead.c
+overhead_OBJECTS = overhead.$(OBJEXT)
+overhead_LDADD = $(LDADD)
+overhead_DEPENDENCIES = $(LIBHDF5)
+perf_SOURCES = perf.c
+perf_OBJECTS = perf.$(OBJEXT)
+perf_DEPENDENCIES = $(LIBH5TEST) $(LIBHDF5)
+perf_meta_SOURCES = perf_meta.c
+perf_meta_OBJECTS = perf_meta.$(OBJEXT)
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+# Install directories that automake doesn't know about
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+
+# Shell commands used in Makefiles
+RM = rm -f
+CP = cp
+
+# Some machines need a command to run executables; this is that command
+# so that our tests will run.
+# We use RUNEXEC instead of RUNSERIAL directly because it may be that
+# some tests need to be run with a different command.  Older versions
+# of the makefiles used the command
+# $(LIBTOOL) --mode=execute
+# in some directories, for instance.
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+# Libraries to link to while building
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+
+# Note that in svn revision 19400 the '/' after DESTDIR in H5* variables below  
+# has been removed. According to the official description of DESTDIR by Gnu at 
+# http://www.gnu.org/prep/standards/html_node/DESTDIR.html, DESTDIR is 
+# prepended to the normal and complete install path that it precedes for the 
+# purpose of installing in a temporary directory which is useful for building 
+# rpms and other packages.  The '/' after ${DESTDIR} will be followed by another 
+# '/' at the beginning of the normal install path.  When DESTDIR is empty the  
+# path then begins with '//', which is incorrect and causes problems at least for 
+# Cygwin.   
+
+# Scripts used to build examples
+# If only shared libraries have been installed, have h5cc build examples with
+# shared libraries instead of static libraries
+H5CC = ${DESTDIR}$(bindir)/h5cc
+H5CC_PP = ${DESTDIR}$(bindir)/h5pcc
+H5FC = ${DESTDIR}$(bindir)/h5fc
+H5FC_PP = ${DESTDIR}$(bindir)/h5pfc
+H5CPP = ${DESTDIR}$(bindir)/h5c++
+ACLOCAL_AMFLAGS = "-I m4"
+
+# The trace script; this is used on source files from the C library to
+# insert tracing macros.
+TRACE = perl $(top_srcdir)/bin/trace
+
+# .chkexe files are used to mark tests that have run successfully.
+# .chklog files are output from those tests.
+# *.clog are from the MPE option.
+CHECK_CLEANFILES = *.chkexe *.chklog *.clog
+
+# Add h5perf and h5perf_serial specific linker flags here
+h5perf_LDFLAGS = $(LT_STATIC_EXEC) $(AM_LDFLAGS)
+h5perf_serial_LDFLAGS = $(LT_STATIC_EXEC) $(AM_LDFLAGS)
+
+# Some programs are not built or run by default, but can be built by hand or by
+# specifying --enable-build-all at configure time.
+# Also, some of these programs should only be built in parallel.
+# Currently there is no such program.
+@BUILD_PARALLEL_CONDITIONAL_TRUE@PARA_BUILD_ALL = 
+@BUILD_ALL_CONDITIONAL_TRUE@BUILD_ALL_PROGS = $(PARA_BUILD_ALL)
+
+# Define programs that will be run in 'make check'
+# List them in the order they should be run.
+# Parallel test programs.
+@BUILD_PARALLEL_CONDITIONAL_TRUE@TEST_PROG_PARA = h5perf perf
+# Serial test programs.
+TEST_PROG = iopipe chunk overhead zip_perf perf_meta h5perf_serial $(BUILD_ALL_PROGS)
+h5perf_SOURCES = pio_perf.c pio_engine.c pio_timer.c
+h5perf_serial_SOURCES = sio_perf.c sio_engine.c sio_timer.c
+
+# These are the files that `make clean' (and derivatives) will remove from
+# this directory.
+CLEANFILES = *.h5 *.raw *.dat x-gnuplot perftest.out
+
+# All of the programs depend on the main hdf5 library, and some of them
+# depend on test or tools library.
+LDADD = $(LIBHDF5)
+h5perf_LDADD = $(LIBH5TOOLS) $(LIBH5TEST) $(LIBHDF5)
+h5perf_serial_LDADD = $(LIBH5TOOLS) $(LIBH5TEST) $(LIBHDF5)
+perf_LDADD = $(LIBH5TEST) $(LIBHDF5)
+iopipe_LDADD = $(LIBH5TEST) $(LIBHDF5)
+zip_perf_LDADD = $(LIBH5TOOLS) $(LIBH5TEST) $(LIBHDF5)
+perf_meta_LDADD = $(LIBH5TEST) $(LIBHDF5)
+
+# Automake needs to be taught how to build lib, progs, and tests targets.
+# These will be filled in automatically for the most part (e.g.,
+# lib_LIBRARIES are built for lib target), but EXTRA_LIB, EXTRA_PROG, and
+# EXTRA_TEST variables are supplied to allow the user to force targets to
+# be built at certain times. 
+LIB = $(lib_LIBRARIES) $(lib_LTLIBRARIES) $(noinst_LIBRARIES)                 \
+      $(noinst_LTLIBRARIES) $(check_LIBRARIES) $(check_LTLIBRARIES) $(EXTRA_LIB)
+
+PROGS = $(bin_PROGRAMS) $(bin_SCRIPTS) $(noinst_PROGRAMS) $(noinst_SCRIPTS)   \
+        $(EXTRA_PROG)
+
+chk_TESTS = $(check_PROGRAMS) $(check_SCRIPTS) $(EXTRA_TEST) 
+TEST_EXTENSIONS = .sh
+SH_LOG_COMPILER = $(SHELL)
+AM_SH_LOG_FLAGS = 
+TEST_PROG_CHKEXE = $(TEST_PROG:=.chkexe_)
+TEST_PROG_PARA_CHKEXE = $(TEST_PROG_PARA:=.chkexe_)
+TEST_SCRIPT_CHKSH = $(TEST_SCRIPT:=.chkexe_)
+TEST_SCRIPT_PARA_CHKSH = $(TEST_SCRIPT_PARA:=.chkexe_)
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .lo .log .o .obj .sh .sh$(EXEEXT) .trs
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am $(top_srcdir)/config/commence.am $(top_srcdir)/config/conclude.am $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign tools/perform/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --foreign tools/perform/Makefile
+.PRECIOUS: Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	esac;
+$(top_srcdir)/config/commence.am $(top_srcdir)/config/conclude.am:
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+install-binPROGRAMS: $(bin_PROGRAMS)
+	@$(NORMAL_INSTALL)
+	@list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
+	if test -n "$$list"; then \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(bindir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(bindir)" || exit 1; \
+	fi; \
+	for p in $$list; do echo "$$p $$p"; done | \
+	sed 's/$(EXEEXT)$$//' | \
+	while read p p1; do if test -f $$p \
+	 || test -f $$p1 \
+	  ; then echo "$$p"; echo "$$p"; else :; fi; \
+	done | \
+	sed -e 'p;s,.*/,,;n;h' \
+	    -e 's|.*|.|' \
+	    -e 'p;x;s,.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/' | \
+	sed 'N;N;N;s,\n, ,g' | \
+	$(AWK) 'BEGIN { files["."] = ""; dirs["."] = 1 } \
+	  { d=$$3; if (dirs[d] != 1) { print "d", d; dirs[d] = 1 } \
+	    if ($$2 == $$4) files[d] = files[d] " " $$1; \
+	    else { print "f", $$3 "/" $$4, $$1; } } \
+	  END { for (d in files) print "f", d, files[d] }' | \
+	while read type dir files; do \
+	    if test "$$dir" = .; then dir=; else dir=/$$dir; fi; \
+	    test -z "$$files" || { \
+	    echo " $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files '$(DESTDIR)$(bindir)$$dir'"; \
+	    $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files "$(DESTDIR)$(bindir)$$dir" || exit $$?; \
+	    } \
+	; done
+
+uninstall-binPROGRAMS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
+	files=`for p in $$list; do echo "$$p"; done | \
+	  sed -e 'h;s,^.*/,,;s/$(EXEEXT)$$//;$(transform)' \
+	      -e 's/$$/$(EXEEXT)/' \
+	`; \
+	test -n "$$list" || exit 0; \
+	echo " ( cd '$(DESTDIR)$(bindir)' && rm -f" $$files ")"; \
+	cd "$(DESTDIR)$(bindir)" && rm -f $$files
+
+clean-binPROGRAMS:
+	@list='$(bin_PROGRAMS)'; test -n "$$list" || exit 0; \
+	echo " rm -f" $$list; \
+	rm -f $$list || exit $$?; \
+	test -n "$(EXEEXT)" || exit 0; \
+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
+
+clean-checkPROGRAMS:
+	@list='$(check_PROGRAMS)'; test -n "$$list" || exit 0; \
+	echo " rm -f" $$list; \
+	rm -f $$list || exit $$?; \
+	test -n "$(EXEEXT)" || exit 0; \
+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
+
+chunk$(EXEEXT): $(chunk_OBJECTS) $(chunk_DEPENDENCIES) $(EXTRA_chunk_DEPENDENCIES) 
+	@rm -f chunk$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(chunk_OBJECTS) $(chunk_LDADD) $(LIBS)
+
+h5perf$(EXEEXT): $(h5perf_OBJECTS) $(h5perf_DEPENDENCIES) $(EXTRA_h5perf_DEPENDENCIES) 
+	@rm -f h5perf$(EXEEXT)
+	$(AM_V_CCLD)$(h5perf_LINK) $(h5perf_OBJECTS) $(h5perf_LDADD) $(LIBS)
+
+h5perf_serial$(EXEEXT): $(h5perf_serial_OBJECTS) $(h5perf_serial_DEPENDENCIES) $(EXTRA_h5perf_serial_DEPENDENCIES) 
+	@rm -f h5perf_serial$(EXEEXT)
+	$(AM_V_CCLD)$(h5perf_serial_LINK) $(h5perf_serial_OBJECTS) $(h5perf_serial_LDADD) $(LIBS)
+
+iopipe$(EXEEXT): $(iopipe_OBJECTS) $(iopipe_DEPENDENCIES) $(EXTRA_iopipe_DEPENDENCIES) 
+	@rm -f iopipe$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(iopipe_OBJECTS) $(iopipe_LDADD) $(LIBS)
+
+overhead$(EXEEXT): $(overhead_OBJECTS) $(overhead_DEPENDENCIES) $(EXTRA_overhead_DEPENDENCIES) 
+	@rm -f overhead$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(overhead_OBJECTS) $(overhead_LDADD) $(LIBS)
+
+perf$(EXEEXT): $(perf_OBJECTS) $(perf_DEPENDENCIES) $(EXTRA_perf_DEPENDENCIES) 
+	@rm -f perf$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(perf_OBJECTS) $(perf_LDADD) $(LIBS)
+
+perf_meta$(EXEEXT): $(perf_meta_OBJECTS) $(perf_meta_DEPENDENCIES) $(EXTRA_perf_meta_DEPENDENCIES) 
+	@rm -f perf_meta$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(perf_meta_OBJECTS) $(perf_meta_LDADD) $(LIBS)
+
+zip_perf$(EXEEXT): $(zip_perf_OBJECTS) $(zip_perf_DEPENDENCIES) $(EXTRA_zip_perf_DEPENDENCIES) 
+	@rm -f zip_perf$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(zip_perf_OBJECTS) $(zip_perf_LDADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/chunk.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/iopipe.Po@am__quote@
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+ID: $(am__tagged_files)
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+	here=`pwd`; \
+	$(am__define_uniq_tagged_files); \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
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+	  if test $$# -gt 0; then \
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+	fi
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+
+GTAGS:
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+
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+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
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+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+# Recover from deleted '.trs' file; this should ensure that
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+# both 'foo.log' and 'foo.trs'.  Break the recipe in two subshells
+# to avoid problems with "make -n".
+.log.trs:
+	rm -f $< $@
+	$(MAKE) $(AM_MAKEFLAGS) $<
+
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+	            done`; \
+	if test -n "$$redo_bases"; then \
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+	    test -f $$i.log && test -r $$i.log \
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+	  test $$st -eq 0 || exit 1; \
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+	      color_start= color_end=; \
+	    fi; \
+	    echo "$${color_start}# $$desc $$count$${color_end}"; \
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+	create_testsuite_report () \
+	{ \
+	  result_count $$1 "TOTAL:" $$all   "$$brg"; \
+	  result_count $$1 "PASS: " $$pass  "$$grn"; \
+	  result_count $$1 "SKIP: " $$skip  "$$blu"; \
+	  result_count $$1 "XFAIL:" $$xfail "$$lgn"; \
+	  result_count $$1 "FAIL: " $$fail  "$$red"; \
+	  result_count $$1 "XPASS:" $$xpass "$$red"; \
+	  result_count $$1 "ERROR:" $$error "$$mgn"; \
+	}; \
+	{								\
+	  echo "$(PACKAGE_STRING): $(subdir)/$(TEST_SUITE_LOG)" |	\
+	    $(am__rst_title);						\
+	  create_testsuite_report --no-color;				\
+	  echo;								\
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+	  for b in $$bases; do echo $$b; done				\
+	    | $(am__create_global_log);					\
+	} >$(TEST_SUITE_LOG).tmp || exit 1;				\
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+	if $$success; then						\
+	  col="$$grn";							\
+	 else								\
+	  col="$$red";							\
+	  test x"$$VERBOSE" = x || cat $(TEST_SUITE_LOG);		\
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+	echo "$${col}$$br$${std}"; 					\
+	echo "$${col}Testsuite summary for $(PACKAGE_STRING)$${std}";	\
+	echo "$${col}$$br$${std}"; 					\
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+	echo "$$col$$br$$std";						\
+	if $$success; then :; else					\
+	  echo "$${col}See $(subdir)/$(TEST_SUITE_LOG)$${std}";		\
+	  if test -n "$(PACKAGE_BUGREPORT)"; then			\
+	    echo "$${col}Please report to $(PACKAGE_BUGREPORT)$${std}";	\
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+	  echo "$$col$$br$$std";					\
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+	@set +e; $(am__set_TESTS_bases); \
+	bases=`for i in $$bases; do echo $$i; done \
+	         | $(am__list_recheck_tests)` || exit 1; \
+	log_list=`for i in $$bases; do echo $$i.log; done`; \
+	log_list=`echo $$log_list`; \
+	$(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) \
+	        am__force_recheck=am--force-recheck \
+	        TEST_LOGS="$$log_list"; \
+	exit $$?
+iopipe.log: iopipe$(EXEEXT)
+	@p='iopipe$(EXEEXT)'; \
+	b='iopipe'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+chunk.log: chunk$(EXEEXT)
+	@p='chunk$(EXEEXT)'; \
+	b='chunk'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+overhead.log: overhead$(EXEEXT)
+	@p='overhead$(EXEEXT)'; \
+	b='overhead'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+zip_perf.log: zip_perf$(EXEEXT)
+	@p='zip_perf$(EXEEXT)'; \
+	b='zip_perf'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+perf_meta.log: perf_meta$(EXEEXT)
+	@p='perf_meta$(EXEEXT)'; \
+	b='perf_meta'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+h5perf_serial.log: h5perf_serial$(EXEEXT)
+	@p='h5perf_serial$(EXEEXT)'; \
+	b='h5perf_serial'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+.sh.log:
+	@p='$<'; \
+	$(am__set_b); \
+	$(am__check_pre) $(SH_LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_SH_LOG_DRIVER_FLAGS) $(SH_LOG_DRIVER_FLAGS) -- $(SH_LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+@am__EXEEXT_TRUE@.sh$(EXEEXT).log:
+@am__EXEEXT_TRUE@	@p='$<'; \
+@am__EXEEXT_TRUE@	$(am__set_b); \
+@am__EXEEXT_TRUE@	$(am__check_pre) $(SH_LOG_DRIVER) --test-name "$$f" \
+@am__EXEEXT_TRUE@	--log-file $$b.log --trs-file $$b.trs \
+@am__EXEEXT_TRUE@	$(am__common_driver_flags) $(AM_SH_LOG_DRIVER_FLAGS) $(SH_LOG_DRIVER_FLAGS) -- $(SH_LOG_COMPILE) \
+@am__EXEEXT_TRUE@	"$$tst" $(AM_TESTS_FD_REDIRECT)
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+	$(MAKE) $(AM_MAKEFLAGS) $(check_PROGRAMS)
+	$(MAKE) $(AM_MAKEFLAGS) check-TESTS
+check: check-am
+all-am: Makefile $(PROGRAMS) all-local
+installdirs:
+	for dir in "$(DESTDIR)$(bindir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+	-test -z "$(TEST_LOGS)" || rm -f $(TEST_LOGS)
+	-test -z "$(TEST_LOGS:.log=.trs)" || rm -f $(TEST_LOGS:.log=.trs)
+	-test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-binPROGRAMS clean-checkPROGRAMS clean-generic \
+	clean-libtool mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-binPROGRAMS
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool mostlyclean-local
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-binPROGRAMS
+
+.MAKE: check-am install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am all-local check check-TESTS \
+	check-am clean clean-binPROGRAMS clean-checkPROGRAMS \
+	clean-generic clean-libtool cscopelist-am ctags ctags-am \
+	distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-binPROGRAMS \
+	install-data install-data-am install-dvi install-dvi-am \
+	install-exec install-exec-am install-html install-html-am \
+	install-info install-info-am install-man install-pdf \
+	install-pdf-am install-ps install-ps-am install-strip \
+	installcheck installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool mostlyclean-local pdf \
+	pdf-am ps ps-am recheck tags tags-am uninstall uninstall-am \
+	uninstall-binPROGRAMS
+
+
+# List all build rules defined by HDF5 Makefiles as "PHONY" targets here.
+# This tells the Makefiles that these targets are not files to be built but
+# commands that should be executed even if a file with the same name already
+# exists.
+.PHONY: build-check-clean build-check-p build-check-s build-lib build-progs \
+        build-tests check-clean check-install check-p check-s check-vfd \
+        install-doc lib progs tests uninstall-doc _exec_check-s _test help
+
+help:
+	@$(top_srcdir)/bin/makehelp
+
+# lib/progs/tests targets recurse into subdirectories. build-* targets
+# build files in this directory.
+build-lib: $(LIB)
+build-progs: $(LIB) $(PROGS)
+build-tests: $(LIB) $(PROGS) $(chk_TESTS)
+
+# General rule for recursive building targets.
+# BUILT_SOURCES contain targets that need to be built before anything else
+# in the directory (e.g., for Fortran type detection)
+lib progs tests check-s check-p :: $(BUILT_SOURCES)
+	@$(MAKE) $(AM_MAKEFLAGS) build-$@ || exit 1;
+	@for d in X $(SUBDIRS); do                                             \
+	    if test $$d != X && test $$d != .; then                           \
+	        (set -x; cd $$d && $(MAKE) $(AM_MAKEFLAGS) $@) || exit 1;     \
+	    fi;                                                               \
+	done
+
+# General rule for recursive cleaning targets.  Like the rule above,
+# but doesn't require building BUILT_SOURCES.
+check-clean ::
+	@$(MAKE) $(AM_MAKEFLAGS) build-$@ || exit 1;
+	@for d in X $(SUBDIRS); do                                             \
+	    if test $$d != X && test $$d != .; then                           \
+	        (set -x; cd $$d && $(MAKE) $(AM_MAKEFLAGS) $@) || exit 1;     \
+	    fi;                                                               \
+	done
+
+# Tell Automake to build tests when the user types `make all' (this is
+# not its default behavior).  Also build EXTRA_LIB and EXTRA_PROG since
+# Automake won't build them automatically, either.
+all-local: $(EXTRA_LIB) $(EXTRA_PROG) $(chk_TESTS)
+
+# make install-doc doesn't do anything outside of doc directory, but
+# Makefiles should recognize it.
+# UPDATE: docs no longer reside in this build tree, so this target
+# is depreciated.
+install-doc uninstall-doc:
+	@echo "Nothing to be done."
+
+# clean up files generated by tests so they can be re-run.
+build-check-clean:
+	$(RM) -rf $(CHECK_CLEANFILES)
+
+# run check-clean whenever mostlyclean is run
+mostlyclean-local: build-check-clean
+
+# check-install is just a synonym for installcheck
+check-install: installcheck
+
+# Run each test in order, passing $(TEST_FLAGS) to the program.
+# Since tests are done in a shell loop, "make -i" does apply inside it.
+# Set HDF5_Make_Ignore to a non-blank string to ignore errors inside the loop.
+# The timestamps give a rough idea how much time the tests use.
+#
+# Note that targets in chk_TESTS (defined above) will be built when the user
+# types 'make tests' or 'make check', but only programs in TEST_PROG,
+# TEST_PROG_PARA, or TEST_SCRIPT will actually be executed.
+check-TESTS: test
+
+test _test:
+	@$(MAKE) build-check-s
+	@$(MAKE) build-check-p
+
+# Actual execution of check-s.
+build-check-s: $(LIB) $(PROGS) $(chk_TESTS)
+	@if test -n "$(TEST_PROG)$(TEST_SCRIPT)"; then      \
+	   echo "===Serial tests in `echo ${PWD} | sed -e s:.*/::` begin `date`==="; \
+	fi
+	@$(MAKE) $(AM_MAKEFLAGS) _exec_check-s
+	@if test -n "$(TEST_PROG)$(TEST_SCRIPT)"; then      \
+	    echo "===Serial tests in `echo ${PWD} | sed -e s:.*/::` ended `date`===";\
+	fi
+
+_exec_check-s: $(TEST_PROG_CHKEXE) $(TEST_SCRIPT_CHKSH)
+
+# The dummy.chkexe here prevents the target from being
+# empty if there are no tests in the current directory.
+# $${log} is the log file.
+# $${tname} is the name of test.
+$(TEST_PROG_CHKEXE) $(TEST_PROG_PARA_CHKEXE) dummy.chkexe_:
+	@if test "X$@" != "X.chkexe_" && test "X$@" != "Xdummy.chkexe_"; then \
+	   tname=$(@:.chkexe_=)$(EXEEXT);\
+	   log=$(@:.chkexe_=.chklog); \
+	   echo "============================"; \
+	   if $(top_srcdir)/bin/newer $(@:.chkexe_=.chkexe) $${tname}; then \
+	      echo "No need to test $${tname} again."; \
+	   else \
+	      echo "============================" > $${log}; \
+	      if test "X$(FORTRAN_API)" = "Xyes"; then \
+	         echo "Fortran API: Testing $(HDF5_DRIVER) $${tname} $(TEST_FLAGS)"; \
+	         echo "Fortran API: $(HDF5_DRIVER) $${tname} $(TEST_FLAGS) Test Log" >> $${log}; \
+	      elif test "X$(CXX_API)" = "Xyes"; then \
+	         echo "C++ API: Testing $(HDF5_DRIVER) $${tname} $(TEST_FLAGS)"; \
+	         echo "C++ API: $(HDF5_DRIVER) $${tname} $(TEST_FLAGS) Test Log" >> $${log};\
+	      else \
+	         echo "Testing $(HDF5_DRIVER) $${tname} $(TEST_FLAGS)"; \
+	         echo "$(HDF5_DRIVER) $${tname} $(TEST_FLAGS) Test Log" >> $${log}; \
+	      fi; \
+	      echo "============================" >> $${log}; \
+	      srcdir="$(srcdir)" \
+	         $(TIME) $(RUNEXEC) ./$${tname} $(TEST_FLAGS) >> $${log} 2>&1 \
+	         && touch $(@:.chkexe_=.chkexe) || \
+	         (test $$HDF5_Make_Ignore && echo "*** Error ignored") || \
+	         (cat $${log} && false) || exit 1; \
+	      echo "" >> $${log}; \
+	      echo "Finished testing $${tname} $(TEST_FLAGS)" >> $${log}; \
+	      echo "============================" >> $${log}; \
+	      echo "Finished testing $${tname} $(TEST_FLAGS)"; \
+	      cat $${log}; \
+	   fi; \
+	fi
+
+# The dummysh.chkexe here prevents the target from being
+# empty if there are no tests in the current directory.
+# $${log} is the log file.
+# $${tname} is the name of test.
+$(TEST_SCRIPT_CHKSH) $(TEST_SCRIPT_PARA_CHKSH) dummysh.chkexe_:
+	@if test "X$@" != "X.chkexe_" && test "X$@" != "Xdummysh.chkexe_"; then \
+	   cmd=$(@:.chkexe_=);\
+	   tname=`basename $$cmd`;\
+	   chkname=`basename $(@:.chkexe_=.chkexe)`;\
+	   log=`basename $(@:.chkexe_=.chklog)`; \
+	   echo "============================"; \
+	   if $(top_srcdir)/bin/newer $${chkname} $$cmd $(SCRIPT_DEPEND); then \
+	      echo "No need to test $${tname} again."; \
+	   else \
+	      echo "============================" > $${log}; \
+	      if test "X$(FORTRAN_API)" = "Xyes"; then \
+	         echo "Fortran API: Testing $${tname} $(TEST_FLAGS)"; \
+	         echo "Fortran API: $${tname} $(TEST_FLAGS) Test Log" >> $${log}; \
+	      elif test "X$(CXX_API)" = "Xyes"; then \
+	         echo "C++ API: Testing $${tname} $(TEST_FLAGS)"; \
+	         echo "C++ API: $${tname} $(TEST_FLAGS) Test Log" >> $${log}; \
+	      else \
+	         echo "Testing $${tname} $(TEST_FLAGS)"; \
+	         echo "$${tname} $(TEST_FLAGS) Test Log" >> $${log}; \
+	      fi; \
+	      echo "============================" >> $${log}; \
+	      RUNSERIAL="$(RUNSERIAL)" RUNPARALLEL="$(RUNPARALLEL)"           \
+	      srcdir="$(srcdir)" \
+	         $(TIME) $(SHELL) $$cmd $(TEST_FLAGS) >> $${log} 2>&1 \
+	         && touch $${chkname} || \
+	         (test $$HDF5_Make_Ignore && echo "*** Error ignored") || \
+	         (cat $${log} && false) || exit 1; \
+	      echo "" >> $${log}; \
+	      echo "Finished testing $${tname} $(TEST_FLAGS)" >> $${log}; \
+	      echo "============================" >> $${log}; \
+	      echo "Finished testing $${tname} $(TEST_FLAGS)"; \
+	      cat $${log}; \
+	   fi; \
+	   echo "============================"; \
+	fi
+
+# Actual execution of check-p.
+build-check-p: $(LIB) $(PROGS) $(chk_TESTS)
+	@if test -n "$(TEST_PROG_PARA)$(TEST_SCRIPT_PARA)"; then      \
+	   echo "===Parallel tests in `echo ${PWD} | sed -e s:.*/::` begin `date`==="; \
+	fi
+	@if test -n "$(TEST_PROG_PARA)"; then                                \
+	    echo "**** Hint ****";                                            \
+	    echo "Parallel test files reside in the current directory"        \
+	         "by default.";                                               \
+	    echo "Set HDF5_PARAPREFIX to use another directory. E.g.,";       \
+	    echo "    HDF5_PARAPREFIX=/PFS/user/me";                          \
+	    echo "    export HDF5_PARAPREFIX";                                \
+	    echo "    make check";                                            \
+	    echo "**** end of Hint ****";                                     \
+	fi
+	@for test in $(TEST_PROG_PARA) dummy; do                             \
+	   if test $$test != dummy; then                                      \
+	      $(MAKE) $(AM_MAKEFLAGS) $$test.chkexe_ \
+	      RUNEXEC="$(RUNPARALLEL)" || exit 1; \
+	   fi;                                                                \
+	done
+	@for test in $(TEST_SCRIPT_PARA) dummy; do                           \
+	  if test $$test != dummy; then                                      \
+	    $(MAKE) $(AM_MAKEFLAGS) $$test.chkexe_ || exit 1; \
+	  fi;                                                                 \
+	done
+	@if test -n "$(TEST_PROG_PARA)$(TEST_SCRIPT_PARA)"; then      \
+	    echo "===Parallel tests in `echo ${PWD} | sed -e s:.*/::` ended `date`===";\
+	fi
+
+# Run test with different Virtual File Driver
+check-vfd: $(LIB) $(PROGS) $(chk_TESTS)
+	@for vfd in $(VFD_LIST) dummy; do                                     \
+	    if test $$vfd != dummy; then                                      \
+	        echo "============================";                          \
+	        echo "Testing Virtual File Driver $$vfd";                     \
+	        echo "============================";                          \
+	        $(MAKE) $(AM_MAKEFLAGS) check-clean || exit 1;                \
+	        HDF5_DRIVER=$$vfd $(MAKE) $(AM_MAKEFLAGS) check || exit 1;    \
+	    fi;                                                               \
+	done
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/tools/perform/benchpar.c b/tools/perform/benchpar.c
new file mode 100644
index 0000000..b75006a
--- /dev/null
+++ b/tools/perform/benchpar.c
@@ -0,0 +1,488 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifdef H5_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <stdlib.h>
+#include <assert.h>
+#include <math.h>
+#include <float.h>
+#include <string.h>
+
+#include "hdf5.h"
+
+/* Local macros */
+#ifdef H5_HAVE_VISUAL_STUDIO
+#define HDgetlogin()           Wgetlogin()
+#else /* H5_HAVE_VISUAL_STUDIO */
+#define HDgetlogin()            getlogin()
+#endif /* H5_HAVE_VISUAL_STUDIO */
+
+/*
+ * HDF Boolean type.
+ */
+#ifndef FALSE
+#   define FALSE 0
+#endif
+#ifndef TRUE
+#   define TRUE 1
+#endif
+
+/* defines for type of VFL driver to use */
+#define FACC_DEFAULT    0
+#define FACC_MPIO       1
+
+/* Defines for computing performance information */
+#define ONE_KB              1024
+#define ONE_MB              (ONE_KB * ONE_KB)
+#define ONE_GB              (ONE_MB * ONE_KB)
+
+/* report 0.0 in case t is zero too */
+#define MB_PER_SEC(bytes,t) ((fabs(t)<0.0000000001) ? 0.0 : ((((double)bytes) / ONE_MB) / (t)))
+
+/* Control default behavior (with no command line arguments) */
+#define DEFAULT_RANK    3
+#define DEFAULT_DIM     1024
+#define DEFAULT_PREFIX      "/tmp"
+#define DEFAULT_USERNAME    "koziol"
+#define DEFAULT_FILENAME    "benchpar.h5"
+#define DEFAULT_SLICE   0
+#define DEFAULT_C_TYPE      int
+#define DEFAULT_HDF5_DATATYPE   H5T_NATIVE_INT  /* Keep this in sync with the DEFAULT_C_TYPE */
+#define DEFAULT_DATASET_NAME    "Dataset"
+#define DEFAULT_VFL_DRIVER      FACC_MPIO
+#define DEFAULT_PAR_MODE        H5FD_MPIO_COLLECTIVE
+#define DEFAULT_CHUNK_STORAGE   0
+#define DEFAULT_ITER    3
+
+/* MPI info */
+int mpi_rank, mpi_size;
+int mpi_namelen;
+char mpi_name[MPI_MAX_PROCESSOR_NAME];
+
+/* Usage information */
+static void usage(void)
+{
+    printf("usage: benchpar [-d <# of dims>] [-s <dim_size>] [-f <file name>] [-h]\n");
+    printf("            [-S <slice dim>] [-I] [-c] [-i <# of iterations>\n");
+    printf("    -c              - Use chunked storage for dataset with 1-1 exact\n");
+    printf("                      mapping of chunks to hyperslabs\n");
+    printf("                      Default: off (i.e. contiguous storage)\n");
+    printf("    -d <# of dims>  - Number of dimensions of the dataset\n");
+    printf("                      Default: 3\n");
+    printf("    -f <file name>  - Set the name of the test file\n");
+    printf("                      Default: /tmp/<login>/benchpar.h5\n");
+    printf("    -h              - Prints usage information\n");
+    printf("    -i <# of iters> - Set the number of test iterations to perform\n");
+    printf("                      Default: 3\n");
+    printf("    -I              - Use independent parallel I/O\n");
+    printf("                      Default: use collective parallel I/O\n");
+    printf("    -s <dim_size>   - Set the size of each of the dataset's dimensions\n");
+    printf("                      Default: 1024\n");
+    printf("    -S <slice dim>  - Set the dimension to slice the dataset along\n");
+    printf("                      Default: 0\n");
+} /* end usage() */
+
+/* Create & initialize file creation property list with appropriate properties */
+static hid_t create_fcpl(void)
+{
+    hid_t fcpl;         /* File creation property list */
+
+    fcpl=H5Pcreate(H5P_FILE_CREATE);
+    assert(fcpl>0);
+
+    return(fcpl);
+} /* end create_fcpl() */
+
+/* Create & initialize file access property list with appropriate properties */
+static hid_t create_fapl(MPI_Comm comm, MPI_Info info, int acc_type )
+{
+    hid_t fapl;                 /* File access property list    */
+    herr_t ret;                 /* Generic return value         */
+
+    fapl = H5Pcreate (H5P_FILE_ACCESS);
+    assert(fapl>0);
+
+    /* set parallel access with communicator, using MPI-I/O driver */
+    if (acc_type == FACC_MPIO) {
+        ret = H5Pset_fapl_mpio(fapl, comm, info);
+        assert(ret>=0);
+    } /* end if */
+
+    return (fapl);
+} /* end create_fapl() */
+
+/* Create & initialize dataset creation property list with appropriate properties */
+static hid_t create_dcpl(unsigned use_chunks, int rank, hsize_t *dims)
+{
+    hid_t dcpl;         /* Dataset creation property list */
+    herr_t ret;         /* Generic return value */
+
+    dcpl=H5Pcreate(H5P_DATASET_CREATE);
+    assert(dcpl>0);
+
+    /* Check if the dataset should be chunked */
+    if(use_chunks) {
+        ret = H5Pset_chunk(dcpl, rank, dims);
+        assert(ret>=0);
+    } /* end if */
+
+    return(dcpl);
+} /* end create_dcpl() */
+
+/* Create & initialize dataset transfer property list with appropriate properties */
+static hid_t create_dxpl(H5FD_mpio_xfer_t par_mode)
+{
+    hid_t dxpl;         /* Dataset creation property list */
+    herr_t ret;         /* Generic return value */
+
+    dxpl=H5Pcreate(H5P_DATASET_XFER);
+    assert(dxpl>0);
+
+    /* Set collective I/O on this transfer */
+    ret=H5Pset_dxpl_mpio(dxpl, par_mode);
+    assert(ret>=0);
+
+    return(dxpl);
+} /* end create_dcpl() */
+
+int main(int argc, char *argv[])
+{
+    int curr_arg;       /* Current command line argument being processed */
+    int rank;           /* Number of dimensions of the dataset */
+    hsize_t dim_size;   /* Dimension size of each dimension */
+    hsize_t dims[H5S_MAX_RANK];      /* Pointer to array of dimensions */
+    hsize_t start[H5S_MAX_RANK];     /* Pointer to array of starting locations for hyperslab selection */
+    hsize_t count[H5S_MAX_RANK];     /* Pointer to array of counts for hyperslab selection */
+    unsigned slice_dim; /* Dimension to slice up */
+    char *file_name=NULL;    /* Name of file to put data into */
+    hid_t fcpl;         /* HDF5 File creation property list ID */
+    hid_t fapl;         /* HDF5 File access property list ID */
+    hid_t dcpl;         /* HDF5 Dataset creation property list ID */
+    hid_t dxpl;         /* HDF5 Dataset transfer property list ID */
+    hid_t fid;          /* HDF5 file ID */
+    hid_t dsid;         /* HDF5 dataset ID */
+    hid_t file_sid;     /* HDF5 dataspace ID for dataset on disk */
+    hid_t mem_sid;      /* HDF5 dataspace ID for dataset in memory */
+    DEFAULT_C_TYPE *buf;        /* Buffer to write out */
+    hsize_t buf_size;   /* Size of buffer to write */
+    int i;              /* Local index variable */
+    herr_t ret;         /* Generic return value */
+    double start_write_time, end_write_time, elap_write_time;   /* Start, end and elapsed time to write raw data */
+    double tmp_max_write_time;      /* Temporary holders for maximum time for all nodes to perform raw data I/O */
+    double max_write_time=-DBL_MAX, min_write_time=DBL_MAX;      /* Minimum & maximum time for all nodes to perform raw data I/O */
+    double start_file_time, end_file_time, elap_file_time;   /* Start, end and elapsed time from file open to file close */
+    double tmp_max_file_time;        /* Temporary holders for maximum time for all nodes from file open to file close */
+    double max_file_time=-DBL_MAX, min_file_time=DBL_MAX;        /* Minimum & maximum time for all nodes from file open to file close */
+    int vfl_type;       /* Type of VFL driver to use */
+    H5FD_mpio_xfer_t par_mode;  /* Type of parallel I/O to perform */
+    unsigned use_chunks;        /* Whether to use chunks for dataset or not */
+    unsigned num_iter;  /* Number of iterations to perform */
+    unsigned u;         /* Local index variable */
+
+    /* Un-buffer the stdout and stderr */
+    setbuf(stderr, NULL);
+    setbuf(stdout, NULL);
+
+    /* MPI initialization */
+    MPI_Init(&argc,&argv);
+    MPI_Comm_size(MPI_COMM_WORLD,&mpi_size);
+    MPI_Comm_rank(MPI_COMM_WORLD,&mpi_rank);
+    MPI_Get_processor_name(mpi_name,&mpi_namelen);
+
+    /* Set some defaults */
+    rank=DEFAULT_RANK;
+    dim_size=DEFAULT_DIM;
+    slice_dim=DEFAULT_SLICE;
+    vfl_type=DEFAULT_VFL_DRIVER;
+    par_mode=DEFAULT_PAR_MODE;
+    use_chunks=DEFAULT_CHUNK_STORAGE;
+    num_iter=DEFAULT_ITER;
+
+    /* Parse command line arguments */
+    if(argc>1) {
+        curr_arg=1;
+        while(curr_arg<argc) {
+            /* Trap any unknown command line parameters */
+            if(argv[curr_arg][0]!='-') {
+                printf("unknown command line parameter: %s\n",argv[curr_arg]);
+                goto done;
+            } /* end if */
+
+            /* Skip over command line flag */
+            curr_arg++;
+
+            switch(argv[curr_arg-1][1]) {
+                case 'c':       /* Use chunked storage for dataset */
+                    use_chunks=1;
+                    break;
+
+                case 'd':       /* Change number of dimensions */
+                    /* Get new number of dimensions */
+                    rank=atoi(argv[curr_arg]);
+                    curr_arg++; /* Skip over number of dimensions */
+
+                    /* Sanity check */
+                    if(rank<=0) {
+                        printf("rank=%d, invalid number of dimensions: %d\n",mpi_rank,rank);
+                        goto done;
+                    } /* end if */
+                    break;
+
+                case 'f':       /* Change test file name */
+                    /* Get new file name */
+                    file_name=strdup(argv[curr_arg]);
+                    curr_arg++; /* Skip over file name from command line */
+                    break;
+
+                case 'h':       /* Print usage information */
+                    usage();
+                    goto done;
+                    break;
+
+                case 'i':       /* Change number of iterations */
+                    /* Get new number of dimensions */
+                    num_iter=atoi(argv[curr_arg]);
+                    curr_arg++; /* Skip over number of iterations */
+
+                    /* Sanity check */
+                    if(num_iter<1) {
+                        printf("rank=%d, invalid number of iterations: %u\n",mpi_rank,num_iter);
+                        goto done;
+                    } /* end if */
+                    break;
+
+                case 'I':       /* Use independent I/O for parallel I/O */
+                    par_mode=H5FD_MPIO_INDEPENDENT;
+                    break;
+
+                case 's':       /* Change dimension size */
+                    /* Get new dimension size */
+                    dim_size=atoi(argv[curr_arg]);
+                    curr_arg++; /* Skip over dimension size from command line */
+
+                    /* Sanity check */
+                    if(dim_size<=0) {
+                        printf("rank=%d, invalid dimension size: %ld\n",mpi_rank,(long)dim_size);
+                        goto done;
+                    } /* end if */
+                    break;
+
+                case 'S':       /* Change dimension to slice */
+                    /* Get new dimension to slice */
+                    slice_dim=atoi(argv[curr_arg]);
+                    curr_arg++; /* Skip over slice dimension from command line */
+                    break;
+
+                default:
+                    printf("rank=%d, unknown command line parameter: %s\n",mpi_rank,argv[curr_arg-1]);
+                    goto done;
+            } /* end switch */
+        } /* end while */
+    } /* end if */
+
+    /* Sanity check */
+    if(slice_dim>=rank) {
+        printf("rank=%d, error, slice dim larger than rank: slice_dim=%d, rank=%d\n",mpi_rank,slice_dim,rank);
+        goto done;
+    } /* end if */
+
+    /* Set rest of defaults */
+    if(file_name==NULL) {
+        char *login;    /* Pointer to login name */
+
+        /* Get the login name for this user */
+        login=HDgetlogin();
+        if(login==NULL)
+            login=DEFAULT_USERNAME;
+
+        /* Allocate enough room for the prefix, the login name, two '/'s, the filename and the string terminator */
+        file_name=malloc(strlen(DEFAULT_PREFIX)+1+strlen(login)+1+strlen(DEFAULT_FILENAME)+1);
+        strcpy(file_name,DEFAULT_PREFIX);
+        strcat(file_name,"/");
+        strcat(file_name,login);
+        strcat(file_name,"/");
+        strcat(file_name,DEFAULT_FILENAME);
+    } /* end if */
+
+    /* Allocate memory for this process's portion of dataset */
+    buf_size=sizeof(DEFAULT_C_TYPE);
+    for(i=0; i<rank; i++)
+        buf_size *= dim_size;
+    buf_size /= mpi_size;
+
+    /* Sanity check for overflow */
+    assert((hsize_t)((size_t)buf_size)==buf_size);
+
+    buf=malloc((size_t)buf_size);
+    assert(buf);
+
+    /* Initialize dataset portion to something unique for each process */
+    memset(buf,mpi_rank,(size_t)buf_size);
+
+    for(u=0; u<num_iter; u++) {
+        /* Create file creation property list */
+        fcpl=create_fcpl();
+        assert(fcpl>0);
+
+        /* Create file access property list */
+        fapl=create_fapl(MPI_COMM_WORLD,MPI_INFO_NULL,vfl_type);
+        assert(fapl>0);
+
+        /* Get file start time */
+        start_file_time = MPI_Wtime();
+
+        /* Create file */
+        fid=H5Fcreate(file_name,H5F_ACC_TRUNC,fcpl,fapl);
+        assert(fid>0);
+
+        /* Close file creation property list */
+        ret=H5Pclose(fcpl);
+        assert(ret>=0);
+
+        /* Close file access property list */
+        ret=H5Pclose(fapl);
+        assert(ret>=0);
+
+        /* Create dataspace for dataset on disk */
+        for(i=0; i<rank; i++)
+            dims[i]=dim_size;
+
+        file_sid=H5Screate_simple(rank,dims,NULL);
+        assert(file_sid>0);
+
+        /* Create dataspace for buffer in memory */
+        for(i=0; i<rank; i++)
+            dims[i]=dim_size;
+        dims[slice_dim] /= mpi_size;
+
+        mem_sid=H5Screate_simple(rank,dims,NULL);
+        assert(mem_sid>0);
+
+        /* Create dataset creation property list */
+        dcpl=create_dcpl(use_chunks,rank,dims);
+        assert(dcpl>0);
+
+        /* Create dataset */
+        dsid = H5Dcreate2(fid, DEFAULT_DATASET_NAME, DEFAULT_HDF5_DATATYPE, file_sid, H5P_DEFAULT, dcpl, H5P_DEFAULT);
+        assert(dsid > 0);
+
+        /* Close dataset creation property list */
+        ret=H5Pclose(dcpl);
+        assert(ret>=0);
+
+        /* Select hyperslab for file dataspace */
+        for(i=0; i<rank; i++) {
+            start[i]=0;
+            count[i]=dim_size;
+        } /* end for */
+        start[slice_dim]=mpi_rank*(dim_size/mpi_size);
+        count[slice_dim]=dim_size/mpi_size;
+
+        ret = H5Sselect_hyperslab(file_sid,H5S_SELECT_SET,start,NULL,count,NULL);
+        assert(ret>=0);
+
+        /* Create dataset transfer property list */
+        dxpl=create_dxpl(par_mode);
+        assert(dxpl>0);
+
+        /* Get raw data start time */
+        start_write_time = MPI_Wtime();
+
+        /* Write hyperslab to dataset */
+        ret = H5Dwrite(dsid, DEFAULT_HDF5_DATATYPE, mem_sid,
+                       file_sid, dxpl, buf);
+        assert(ret>=0);
+
+        /* Get stop time for raw data timer */
+        end_write_time = MPI_Wtime();
+
+        /* Close dataset transfer property list */
+        ret=H5Pclose(dxpl);
+        assert(ret>=0);
+
+        /* Close memory dataspace */
+        ret=H5Sclose(mem_sid);
+        assert(ret>=0);
+
+        /* Close file dataspace */
+        ret=H5Sclose(file_sid);
+        assert(ret>=0);
+
+        /* Close dataset */
+        ret=H5Dclose(dsid);
+        assert(ret>=0);
+
+        /* Close file */
+        ret=H5Fclose(fid);
+        assert(ret>=0);
+
+        /* Get stop time for file timer */
+        end_file_time = MPI_Wtime();
+
+        /* Compute timing results */
+        elap_write_time=end_write_time-start_write_time;
+        elap_file_time=end_file_time-start_file_time;
+
+        /* Collect the minimum and maximum times by MPI reduces */
+        MPI_Allreduce(&elap_write_time, &tmp_max_write_time, 1, MPI_DOUBLE, MPI_MAX, MPI_COMM_WORLD);
+        MPI_Allreduce(&elap_file_time, &tmp_max_file_time, 1, MPI_DOUBLE, MPI_MAX, MPI_COMM_WORLD);
+
+        /* Track the fastest & slowest total runs */
+        if(tmp_max_write_time>max_write_time)
+            max_write_time=tmp_max_write_time;
+        if(tmp_max_write_time<min_write_time)
+            min_write_time=tmp_max_write_time;
+        if(tmp_max_file_time>max_file_time)
+            max_file_time=tmp_max_file_time;
+        if(tmp_max_file_time<min_file_time)
+            min_file_time=tmp_max_file_time;
+    } /* end for */
+
+    /* Only print information from one node */
+    if(mpi_rank==0) {
+        /* Print information about test */
+        printf("File driver used: %s\n",vfl_type==FACC_MPIO ? "MPI-I/O" : "Unknown");
+        printf("Type of parallel access: %s\n",par_mode==H5FD_MPIO_COLLECTIVE ? "Collective" : "Independent");
+        printf("Type of dataset storage: %s\n",use_chunks ? "Chunked" : "Contiguous");
+        printf("Number of processes: %d\n",mpi_size);
+        printf("Element size: %u\n",(unsigned)sizeof(DEFAULT_C_TYPE));
+        printf("# of dimensions: %d\n",rank);
+        printf("Dimension size: %ld\n",(long)dim_size);
+        printf("Dimension sliced: %u\n",slice_dim);
+        printf("Number of elements: %lu\n",(unsigned long)((buf_size/sizeof(DEFAULT_C_TYPE))*mpi_size));
+        printf("Total dataset size (bytes): %lu\n",(unsigned long)(buf_size*mpi_size));
+        printf("Dataset size per process (bytes): %lu\n",(unsigned long)buf_size);
+
+        /* Print timing results */
+        printf("# of iterations: %u\n",num_iter);
+        printf("Maximum raw data write throughput=%6.2f MB/s (%7.3f s)\n",MB_PER_SEC((buf_size*mpi_size),min_write_time),min_write_time);
+        printf("Minimum raw data write throughput=%6.2f MB/s (%7.3f s)\n",MB_PER_SEC((buf_size*mpi_size),max_write_time),max_write_time);
+        printf("Maximum file throughput=%6.2f MB/s (%7.3f s)\n",MB_PER_SEC((buf_size*mpi_size),min_file_time),min_file_time);
+        printf("Minimum file throughput=%6.2f MB/s (%7.3f s)\n",MB_PER_SEC((buf_size*mpi_size),max_file_time),max_file_time);
+    } /* end if */
+
+done:
+    /* Free buffers allocated */
+    if(file_name)
+        free(file_name);
+    if(buf)
+        free(buf);
+
+    /* MPI termination */
+    MPI_Finalize();
+    return(0);
+} /* end main() */
diff --git a/tools/perform/build_h5perf_alone.sh b/tools/perform/build_h5perf_alone.sh
new file mode 100755
index 0000000..b65e863
--- /dev/null
+++ b/tools/perform/build_h5perf_alone.sh
@@ -0,0 +1,28 @@
+#! /bin/sh -x
+#
+# Copyright by The HDF Group.
+# Copyright by the Board of Trustees of the University of Illinois.
+# All rights reserved.
+#
+# This file is part of HDF5.  The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the files COPYING and Copyright.html.  COPYING can be found at the root
+# of the source code distribution tree; Copyright.html can be found at the
+# root level of an installed copy of the electronic HDF5 document set and
+# is linked from the top-level documents page.  It can also be found at
+# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have
+# access to either file, you may request a copy from help@hdfgroup.org.
+#
+# Name: build_h5perf_alone.sh
+#
+# Puporse: Build the h5perf tool by standalone mode.
+#
+# Created: Albert Cheng, 2005/09/18
+#
+# Modification:
+#
+
+# Default to use h5pcc to build h5perf unless $H5CC is defined.
+# 
+h5pcc=${H5CC:-h5pcc}
+$h5pcc -DSTANDALONE pio_perf.c pio_engine.c pio_timer.c -o h5perf
diff --git a/tools/perform/build_h5perf_serial_alone.sh b/tools/perform/build_h5perf_serial_alone.sh
new file mode 100755
index 0000000..2566609
--- /dev/null
+++ b/tools/perform/build_h5perf_serial_alone.sh
@@ -0,0 +1,28 @@
+#! /bin/sh -x
+#
+# Copyright by The HDF Group.
+# Copyright by the Board of Trustees of the University of Illinois.
+# All rights reserved.
+#
+# This file is part of HDF5.  The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the files COPYING and Copyright.html.  COPYING can be found at the root
+# of the source code distribution tree; Copyright.html can be found at the
+# root level of an installed copy of the electronic HDF5 document set and
+# is linked from the top-level documents page.  It can also be found at
+# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have
+# access to either file, you may request a copy from help@hdfgroup.org.
+#
+# Name: build_h5perf_serial_alone.sh
+#
+# Puporse: Build the h5perf_serial tool by standalone mode.
+#
+# Created: Christian Chilan, 2008/09/02 
+#
+# Modification:
+#
+
+# Default to use h5cc to build h5perf_serial unless $H5CC is defined.
+# 
+h5cc=${H5CC:-h5cc}
+$h5cc -DSTANDALONE sio_perf.c sio_engine.c sio_timer.c -o h5perf_serial
diff --git a/tools/perform/chunk.c b/tools/perform/chunk.c
new file mode 100644
index 0000000..a3c11c1
--- /dev/null
+++ b/tools/perform/chunk.c
@@ -0,0 +1,552 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Programmer:  Robb Matzke <robb@arborea.spizella.com>
+ *              Thursday, May 14, 1998
+ *
+ * Purpose:	Checks the effect of various I/O request sizes and raw data
+ *		cache sizes.  Performance depends on the amount of data read
+ *		from disk and we use a filter to get that number.
+ */
+
+/* See H5private.h for how to include headers */
+#undef NDEBUG
+#include "hdf5.h"
+
+#ifdef H5_STDC_HEADERS
+#   include <assert.h>
+#   include <stdio.h>
+#   include <stdlib.h>
+#   include <string.h>
+#endif
+
+
+#if !defined(H5_HAVE_ATTRIBUTE) || defined __cplusplus
+#   undef __attribute__
+#   define __attribute__(X) /*void*/
+#   define UNUSED /*void*/
+#else
+#   define UNUSED __attribute__((unused))
+#endif
+
+#define FILE_NAME	"chunk.h5"
+#define LINESPOINTS	"lines"
+#define CH_SIZE		100		/*squared in terms of bytes    	*/
+#define DS_SIZE		20		/*squared in terms of chunks	*/
+#define FILTER_COUNTER	305
+#define READ		0
+#define WRITE		1
+#define MIN(X,Y)	((X)<(Y)?(X):(Y))
+#define MAX(X,Y)	((X)>(Y)?(X):(Y))
+#define SQUARE(X)	((X)*(X))
+
+/* The row-major test */
+#define RM_CACHE_STRT	25
+#define RM_CACHE_END	25
+#define RM_CACHE_DELT	5
+#define RM_START	0.50
+#define RM_END	        5.00
+#define RM_DELTA	0.50
+#define RM_W0		0.0
+#define RM_NRDCC	521
+
+/* Diagonal test */
+#define DIAG_CACHE_STRT	25
+#define DIAG_CACHE_END	25
+#define DIAG_CACHE_DELT	5
+#define DIAG_START	0.50
+#define DIAG_END	5.00
+#define DIAG_DELTA	0.50
+/* #define DIAG_W0		0.65 */
+/* #define DIAG_NRDCC		521 */
+
+static size_t	nio_g;
+static hid_t	fapl_g = -1;
+
+/* Local function prototypes */
+static size_t
+counter (unsigned UNUSED flags, size_t cd_nelmts,
+	 const unsigned *cd_values, size_t nbytes,
+	 size_t *buf_size, void **buf);
+
+/* This message derives from H5Z */
+const H5Z_class2_t H5Z_COUNTER[1] = {{
+    H5Z_CLASS_T_VERS,		/* H5Z_class_t version		*/
+    FILTER_COUNTER,		/* Filter id number		*/
+    1, 1,			/* Encoding and decoding enabled */
+    "counter",			/* Filter name for debugging	*/
+    NULL,                       /* The "can apply" callback     */
+    NULL,                       /* The "set local" callback     */
+    counter,			/* The actual filter function	*/
+}};
+
+
+/*-------------------------------------------------------------------------
+ * Function:	counter
+ *
+ * Purpose:	Count number of bytes but don't do anything.
+ *
+ * Return:	Success:	src_nbytes-1
+ *
+ *		Failure:	never fails
+ *
+ * Programmer:	Robb Matzke
+ *              Thursday, May 14, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static size_t
+counter (unsigned UNUSED flags, size_t UNUSED cd_nelmts,
+	 const unsigned UNUSED *cd_values, size_t nbytes,
+	 size_t UNUSED *buf_size, void UNUSED **buf)
+{
+    nio_g += nbytes;
+    return nbytes;
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	create_dataset
+ *
+ * Purpose:	Creates a square dataset with square chunks, registers a
+ *		stupid compress/uncompress pair for counting I/O, and
+ *		initializes the dataset.  The chunk size is in bytes, the
+ *		dataset size is in terms of chunks.
+ *
+ * Return:	void
+ *
+ * Programmer:	Robb Matzke
+ *              Thursday, May 14, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static void
+create_dataset (void)
+{
+    hid_t	file, space, dcpl, dset;
+    hsize_t	size[2];
+    signed char	*buf;
+
+    /* The file */
+    file = H5Fcreate (FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_g);
+
+    /* The data space */
+    size[0] = size[1] = DS_SIZE * CH_SIZE;
+    space = H5Screate_simple(2, size, size);
+
+    /* The storage layout and compression */
+    dcpl = H5Pcreate(H5P_DATASET_CREATE);
+    size[0] = size[1] = CH_SIZE;
+    H5Pset_chunk(dcpl, 2, size);
+    H5Zregister(H5Z_COUNTER);
+    H5Pset_filter(dcpl, FILTER_COUNTER, 0, 0, NULL);
+
+    /* The dataset */
+    dset = H5Dcreate2(file, "dset", H5T_NATIVE_SCHAR, space, H5P_DEFAULT, dcpl, H5P_DEFAULT);
+    assert(dset>=0);
+
+    /* The data */
+    buf = calloc(1, SQUARE (DS_SIZE*CH_SIZE));
+    H5Dwrite(dset, H5T_NATIVE_SCHAR, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf);
+    free(buf);
+
+    /* Close */
+    H5Dclose(dset);
+    H5Sclose(space);
+    H5Pclose(dcpl);
+    H5Fclose(file);
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	test_rowmaj
+ *
+ * Purpose:	Reads the entire dataset using the specified size-squared
+ *		I/O requests in row major order.
+ *
+ * Return:	Efficiency: data requested divided by data actually read.
+ *
+ * Programmer:	Robb Matzke
+ *              Thursday, May 14, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static double
+test_rowmaj (int op, size_t cache_size, size_t io_size)
+{
+    hid_t	file, dset, mem_space, file_space;
+    signed char	*buf = calloc (1, (size_t)(SQUARE(io_size)));
+    hsize_t	i, j, hs_size[2];
+    hsize_t	hs_offset[2];
+    int		mdc_nelmts;
+    size_t	rdcc_nelmts;
+    double	w0;
+
+    H5Pget_cache (fapl_g, &mdc_nelmts, &rdcc_nelmts, NULL, &w0);
+#ifdef RM_W0
+    w0 = RM_W0;
+#endif
+#ifdef RM_NRDCC
+    rdcc_nelmts = RM_NRDCC;
+#endif
+    H5Pset_cache (fapl_g, mdc_nelmts, rdcc_nelmts,
+		  cache_size*SQUARE (CH_SIZE), w0);
+    file = H5Fopen(FILE_NAME, H5F_ACC_RDWR, fapl_g);
+    dset = H5Dopen2(file, "dset", H5P_DEFAULT);
+    file_space = H5Dget_space(dset);
+    nio_g = 0;
+
+    for (i=0; i<CH_SIZE*DS_SIZE; i+=io_size) {
+#if 0
+	fprintf (stderr, "%5d\b\b\b\b\b", (int)i);
+	fflush (stderr);
+#endif
+	for (j=0; j<CH_SIZE*DS_SIZE; j+=io_size) {
+	    hs_offset[0] = i;
+	    hs_size[0] = MIN (io_size, CH_SIZE*DS_SIZE-i);
+	    hs_offset[1] = j;
+	    hs_size[1] = MIN (io_size, CH_SIZE*DS_SIZE-j);
+	    mem_space = H5Screate_simple (2, hs_size, hs_size);
+	    H5Sselect_hyperslab (file_space, H5S_SELECT_SET, hs_offset,
+				 NULL, hs_size, NULL);
+
+	    if (READ==op) {
+		H5Dread (dset, H5T_NATIVE_SCHAR, mem_space, file_space,
+			 H5P_DEFAULT, buf);
+	    } else {
+		H5Dwrite (dset, H5T_NATIVE_SCHAR, mem_space, file_space,
+			  H5P_DEFAULT, buf);
+	    }
+	    H5Sclose (mem_space);
+	}
+    }
+
+    free (buf);
+    H5Sclose (file_space);
+    H5Dclose (dset);
+    H5Fclose (file);
+
+    return (double)SQUARE(CH_SIZE*DS_SIZE)/(double)nio_g;
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	test_diag
+ *
+ * Purpose:	Reads windows diagonally across the dataset.  Each window is
+ *		offset from the previous window by OFFSET in the x and y
+ *		directions.  The reading ends after the (k,k) value is read
+ *		where k is the maximum index in the dataset.
+ *
+ * Return:	Efficiency.
+ *
+ * Programmer:	Robb Matzke
+ *              Friday, May 15, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static double
+test_diag (int op, size_t cache_size, size_t io_size, size_t offset)
+{
+    hid_t	file, dset, mem_space, file_space;
+    hsize_t	i, hs_size[2];
+    hsize_t	nio = 0;
+    hsize_t	hs_offset[2];
+    signed char	*buf = calloc (1, (size_t)(SQUARE (io_size)));
+    int		mdc_nelmts;
+    size_t	rdcc_nelmts;
+    double	w0;
+
+    H5Pget_cache (fapl_g, &mdc_nelmts, &rdcc_nelmts, NULL, &w0);
+#ifdef DIAG_W0
+    w0 = DIAG_W0;
+#endif
+#ifdef DIAG_NRDCC
+    rdcc_nelmts = DIAG_NRDCC;
+#endif
+    H5Pset_cache (fapl_g, mdc_nelmts, rdcc_nelmts,
+		  cache_size*SQUARE (CH_SIZE), w0);
+    file = H5Fopen(FILE_NAME, H5F_ACC_RDWR, fapl_g);
+    dset = H5Dopen2(file, "dset", H5P_DEFAULT);
+    file_space = H5Dget_space(dset);
+    nio_g = 0;
+
+    for (i=0, hs_size[0]=io_size; hs_size[0]==io_size; i+=offset) {
+	hs_offset[0] = hs_offset[1] = i;
+	hs_size[0] = hs_size[1] = MIN (io_size, CH_SIZE*DS_SIZE-i);
+	mem_space = H5Screate_simple (2, hs_size, hs_size);
+	H5Sselect_hyperslab (file_space, H5S_SELECT_SET, hs_offset, NULL,
+			     hs_size, NULL);
+	if (READ==op) {
+	    H5Dread (dset, H5T_NATIVE_SCHAR, mem_space, file_space,
+		     H5P_DEFAULT, buf);
+	} else {
+	    H5Dwrite (dset, H5T_NATIVE_SCHAR, mem_space, file_space,
+		      H5P_DEFAULT, buf);
+	}
+	H5Sclose (mem_space);
+	nio += hs_size[0]*hs_size[1];
+	if (i>0) nio -= SQUARE (io_size-offset);
+    }
+
+    free (buf);
+    H5Sclose (file_space);
+    H5Dclose (dset);
+    H5Fclose (file);
+
+    /*
+     * The extra cast in the following statement is a bug workaround for the
+     * Win32 version 5.0 compiler.
+     * 1998-11-06 ptl
+     */
+    return (double)(hssize_t)nio/(hssize_t)nio_g;
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	main
+ *
+ * Purpose:	See file prologue.
+ *
+ * Return:	Success:
+ *
+ *		Failure:
+ *
+ * Programmer:	Robb Matzke
+ *              Thursday, May 14, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+main (void)
+{
+    size_t	io_size;
+    double	effic, io_percent;
+    FILE	*f, *d;
+    size_t	cache_size;
+    double	w0;
+
+    /*
+     * Create a global file access property list.
+     */
+    fapl_g = H5Pcreate (H5P_FILE_ACCESS);
+    H5Pget_cache (fapl_g, NULL, NULL, NULL, &w0);
+
+    /* Create the file */
+    create_dataset ();
+    f = fopen ("x-gnuplot", "w");
+
+    printf("Test      %8s %8s %8s\n", "CacheSz", "ChunkSz",  "Effic");
+    printf("--------- -------- -------- --------\n");
+
+#if 1
+    /*
+     * Test row-major reading of the dataset with various sizes of request
+     * windows.
+     */
+    if (RM_CACHE_STRT==RM_CACHE_END) {
+	fprintf (f, "set yrange [0:1.2]\n");
+	fprintf (f, "set ytics 0, 0.1, 1\n");
+	fprintf (f, "set xlabel \"%s\"\n",
+		 "Request size as a fraction of chunk size");
+	fprintf (f, "set ylabel \"Efficiency\"\n");
+	fprintf (f, "set title \"Cache %d chunks, w0=%g, "
+		 "Size=(total=%d, chunk=%d)\"\n",
+		 RM_CACHE_STRT, w0, DS_SIZE*CH_SIZE, CH_SIZE);
+    } else {
+	fprintf (f, "set autoscale\n");
+	fprintf (f, "set hidden3d\n");
+    }
+
+    fprintf (f, "set terminal postscript\nset output \"x-rowmaj-rd.ps\"\n");
+    fprintf (f, "%s \"x-rowmaj-rd.dat\" title \"RowMaj-Read\" with %s\n",
+	     RM_CACHE_STRT==RM_CACHE_END?"plot":"splot",
+	     LINESPOINTS);
+    fprintf (f, "set terminal x11\nreplot\n");
+    d = fopen ("x-rowmaj-rd.dat", "w");
+    for (cache_size=RM_CACHE_STRT;
+	 cache_size<=RM_CACHE_END;
+	 cache_size+=RM_CACHE_DELT) {
+	for (io_percent=RM_START; io_percent<=RM_END; io_percent+=RM_DELTA) {
+	    io_size = MAX (1, (size_t)(CH_SIZE*io_percent));
+	    printf ("Rowmaj-rd %8d %8.2f", (int)cache_size, io_percent);
+	    fflush (stdout);
+	    effic = test_rowmaj (READ, cache_size, io_size);
+	    printf (" %8.2f\n", effic);
+	    if (RM_CACHE_STRT==RM_CACHE_END) {
+		fprintf (d, "%g %g\n", io_percent, effic);
+	    } else {
+		fprintf (d, "%g\n", effic);
+	    }
+	}
+	fprintf (d, "\n");
+    }
+    fclose (d);
+    fprintf (f, "pause -1\n");
+#endif
+
+#if 1
+    /*
+     * Test row-major writing of the dataset with various sizes of request
+     * windows.
+     */
+    if (RM_CACHE_STRT==RM_CACHE_END) {
+	fprintf (f, "set yrange [0:1.2]\n");
+	fprintf (f, "set ytics 0, 0.1, 1\n");
+	fprintf (f, "set xlabel \"%s\"\n",
+		 "Request size as a fraction of chunk size");
+	fprintf (f, "set ylabel \"Efficiency\"\n");
+	fprintf (f, "set title \"Cache %d chunks,w0=%g, "
+		 "Size=(total=%d, chunk=%d)\"\n",
+		 RM_CACHE_STRT, w0, DS_SIZE*CH_SIZE, CH_SIZE);
+    } else {
+	fprintf (f, "set autoscale\n");
+	fprintf (f, "set hidden3d\n");
+    }
+
+    fprintf (f, "set terminal postscript\nset output \"x-rowmaj-wr.ps\"\n");
+    fprintf (f, "%s \"x-rowmaj-wr.dat\" title \"RowMaj-Write\" with %s\n",
+	     RM_CACHE_STRT==RM_CACHE_END?"plot":"splot",
+	     LINESPOINTS);
+    fprintf (f, "set terminal x11\nreplot\n");
+    d = fopen ("x-rowmaj-wr.dat", "w");
+    for (cache_size=RM_CACHE_STRT;
+	 cache_size<=RM_CACHE_END;
+	 cache_size+=RM_CACHE_DELT) {
+	for (io_percent=RM_START; io_percent<=RM_END; io_percent+=RM_DELTA) {
+	    io_size = MAX (1, (size_t)(CH_SIZE*io_percent));
+	    printf ("Rowmaj-wr %8d %8.2f", (int)cache_size, io_percent);
+	    fflush (stdout);
+	    effic = test_rowmaj (WRITE, cache_size, io_size);
+	    printf (" %8.2f\n", effic);
+	    if (RM_CACHE_STRT==RM_CACHE_END) {
+		fprintf (d, "%g %g\n", io_percent, effic);
+	    } else {
+		fprintf (d, "%g\n", effic);
+	    }
+	}
+	fprintf (d, "\n");
+    }
+    fclose (d);
+    fprintf (f, "pause -1\n");
+#endif
+
+#if 1
+    /*
+     * Test diagonal read
+     */
+    if (DIAG_CACHE_STRT==DIAG_CACHE_END) {
+	fprintf (f, "set yrange [0:1.2]\n");
+	fprintf (f, "set ytics 0, 0.1, 1\n");
+	fprintf (f, "set xlabel \"%s\"\n",
+		 "Request size as a fraction of chunk size");
+	fprintf (f, "set ylabel \"Efficiency\"\n");
+	fprintf (f, "set title \"Cache %d chunks,w0=%g, "
+		 "Size=(total=%d, chunk=%d)\"\n",
+		 DIAG_CACHE_STRT, w0, DS_SIZE*CH_SIZE, CH_SIZE);
+    } else {
+	fprintf (f, "set autoscale\n");
+	fprintf (f, "set hidden3d\n");
+    }
+    fprintf (f, "set terminal postscript\nset output \"x-diag-rd.ps\"\n");
+    fprintf (f, "%s \"x-diag-rd.dat\" title \"Diag-Read\" with %s\n",
+	     DIAG_CACHE_STRT==DIAG_CACHE_END?"plot":"splot", LINESPOINTS);
+    fprintf (f, "set terminal x11\nreplot\n");
+    d = fopen ("x-diag-rd.dat", "w");
+    for (cache_size=DIAG_CACHE_STRT;
+	 cache_size<=DIAG_CACHE_END;
+	 cache_size+=DIAG_CACHE_DELT) {
+	for (io_percent=DIAG_START;
+	     io_percent<=DIAG_END;
+	     io_percent+=DIAG_DELTA) {
+	    io_size = MAX (1, (size_t)(CH_SIZE*io_percent));
+	    printf ("Diag-rd   %8d %8.2f", (int)cache_size, io_percent);
+	    fflush (stdout);
+	    effic = test_diag (READ, cache_size, io_size, MAX (1, io_size/2));
+	    printf (" %8.2f\n", effic);
+	    if (DIAG_CACHE_STRT==DIAG_CACHE_END) {
+		fprintf (d, "%g %g\n", io_percent, effic);
+	    } else {
+		fprintf (d, "%g\n", effic);
+	    }
+	}
+	fprintf (d, "\n");
+    }
+    fclose (d);
+    fprintf (f, "pause -1\n");
+#endif
+
+#if 1
+    /*
+     * Test diagonal write
+     */
+    if (DIAG_CACHE_STRT==DIAG_CACHE_END) {
+	fprintf (f, "set yrange [0:1.2]\n");
+	fprintf (f, "set ytics 0, 0.1, 1\n");
+	fprintf (f, "set xlabel \"%s\"\n",
+		 "Request size as a fraction of chunk size");
+	fprintf (f, "set ylabel \"Efficiency\"\n");
+	fprintf (f, "set title \"Cache %d chunks, w0=%g, "
+		 "Size=(total=%d, chunk=%d)\"\n",
+		 DIAG_CACHE_STRT, w0, DS_SIZE*CH_SIZE, CH_SIZE);
+    } else {
+	fprintf (f, "set autoscale\n");
+	fprintf (f, "set hidden3d\n");
+    }
+    fprintf (f, "set terminal postscript\nset output \"x-diag-wr.ps\"\n");
+    fprintf (f, "%s \"x-diag-wr.dat\" title \"Diag-Write\" with %s\n",
+	     DIAG_CACHE_STRT==DIAG_CACHE_END?"plot":"splot", LINESPOINTS);
+    fprintf (f, "set terminal x11\nreplot\n");
+    d = fopen ("x-diag-wr.dat", "w");
+    for (cache_size=DIAG_CACHE_STRT;
+	 cache_size<=DIAG_CACHE_END;
+	 cache_size+=DIAG_CACHE_DELT) {
+	for (io_percent=DIAG_START;
+	     io_percent<=DIAG_END;
+	     io_percent+=DIAG_DELTA) {
+	    io_size = MAX (1, (size_t)(CH_SIZE*io_percent));
+	    printf ("Diag-wr   %8d %8.2f", (int)cache_size, io_percent);
+	    fflush (stdout);
+	    effic = test_diag (WRITE, cache_size, io_size, MAX (1, io_size/2));
+	    printf (" %8.2f\n", effic);
+	    if (DIAG_CACHE_STRT==DIAG_CACHE_END) {
+		fprintf (d, "%g %g\n", io_percent, effic);
+	    } else {
+		fprintf (d, "%g\n", effic);
+	    }
+	}
+	fprintf (d, "\n");
+    }
+    fclose (d);
+    fprintf (f, "pause -1\n");
+#endif
+
+
+    H5Pclose (fapl_g);
+    fclose (f);
+    return 0;
+}
+
diff --git a/tools/perform/gen_report.pl b/tools/perform/gen_report.pl
new file mode 100755
index 0000000..285f5d7
--- /dev/null
+++ b/tools/perform/gen_report.pl
@@ -0,0 +1,527 @@
+#!/usr/bin/perl 
+#
+# Copyright by The HDF Group.
+# Copyright by the Board of Trustees of the University of Illinois.
+# All rights reserved.
+#
+# This file is part of HDF5.  The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the files COPYING and Copyright.html.  COPYING can be found at the root
+# of the source code distribution tree; Copyright.html can be found at the
+# root level of an installed copy of the electronic HDF5 document set and
+# is linked from the top-level documents page.  It can also be found at
+# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have
+# access to either file, you may request a copy from help@hdfgroup.org.
+#
+
+#
+#    Generates an ASCII and Excel-importable file of tables representing
+#    the output of running the "pio_perf" command. The name of the input
+#    file is important. The name should reflect the command-line options
+#    used in the performance test. It needs to be of the form:
+#
+#        f#[GMK].i#.d#.X#[GMK].x#[GMK]..*
+#
+#    For example:
+#
+#        PIO_output_f1G.i2.d1.X2M.x128K.frost
+#
+#    for a 1GB sized file ran for 2 iterations with 1 dataset from xfer
+#    buffer size of 128KB to 2MB on the frost machine.
+#
+#    The output file will have the same name as the input, but will append
+#    ".ascii" for the ASCII file and ".excel" for the Excel-importable
+#    file.
+#
+#    The data structure used in this program looks like:
+#
+#        %results = {
+#            num_proc => (
+#                %xfer_size => (
+#                    %posix = {
+#                        'write-only' => ##,
+#                        'write-close' => ##,
+#                        'read-only' => ##,
+#                        'read-close' => ##
+#                    },
+#                    %mpio = {
+#                        'write-only' => ##,
+#                        'write-close' => ##,
+#                        'read-only' => ##,
+#                        'read-close' => ##
+#                    },
+#                    %phdf = {
+#                        'write-only' => ##,
+#                        'write-close' => ##,
+#                        'read-only' => ##,
+#                        'read-close' => ##
+#                    }
+#                )
+#            )
+#        }
+
+use IO::Handle;
+use Getopt::Long;
+use List::Util qw[max];
+
+if ($#ARGV == -1) {
+	usage();
+}
+
+my ($ascii_output, $excel_output);
+
+GetOptions("data_type=s"=>\$data_type, 
+            "buffer_size=i"=>\$transfer_buffer_size,
+            "procs=i"=>\$num_procs_graph,
+	    "help!"=>\$help,
+	    "throughput=s"=>\$throughput_type,
+	    "io_type=i"=>\$io_type,
+            "3d!"=>\$plot_3d);
+
+usage() if $help or !@ARGV;
+
+$throughput_type = "average" if !$throughput_type;
+$io_type = 7 if !$io_type;
+
+foreach my $arg (@ARGV) {
+
+	if ($arg !~ /^-/) {
+		$arg =~ /f([0-9]+.)\.i([0-9]+)\.d([0-9]+)\.X([0-9]+.)\.x([0-9]+.)\.(.*)/;
+
+		my $output = $arg . $1 . ".X" . $4 . ".x" . $5 . "." . $6;
+
+		$ascii_output = $output . ".ascii";
+		$excel_output = $output . ".excel";
+
+		open(INPUT, "<$arg") or die "error: cannot open file $arg: $!\n";
+		open(ASCII_OUTPUT, ">$ascii_output") or
+		    die "error: cannot open file $ascii_output: $!\n";
+		open(EXCEL_OUTPUT, ">$excel_output") or
+		    die "error: cannot open file $excel_output: $!\n";
+	} 
+	else
+	{
+		die "error: unrecognized option: $arg\n";
+	}
+}
+
+my %results;
+my $num_procs = 0;
+my ($xfer_size, $avg_type, $type);
+
+my $posix = 0, $mpio = 1, $phdf5 = 2;
+
+##"==== End of Parameters ===="
+
+while (<INPUT>) {
+	if (/Number of processors = ([0-9]+)/) {
+		$num_procs = $1;
+	}
+
+	if (/Transfer Buffer Size: ([0-9]+)/) {
+		$xfer_size = $1;
+	}
+
+	$type = $posix if /POSIX/;
+	$type = $mpio if /MPIO/;
+	$type = $phdf5 if /PHDF5/;
+
+	if (/Write Open/) {
+		$avg_type = "write-close";
+	} elsif (/Write/) {
+		$avg_type = "write-only";
+	} elsif (/Read Open/) {
+		$avg_type = "read-close";
+	} elsif (/Read/) {
+	    $avg_type = "read-only";
+	}
+
+	if($throughput_type eq "max")
+	{
+	    if (/Maximum Throughput: ( {0,2}[0-9]+\.[0-9]{2}) MB\/s/) {
+		$results{$num_procs}{$xfer_size}[$type]{$avg_type} = $1;
+	    }
+	}
+	elsif($throughput_type eq "min")
+	{
+	    if (/Minimum Throughput: ( {0,2}[0-9]+\.[0-9]{2}) MB\/s/) {
+		$results{$num_procs}{$xfer_size}[$type]{$avg_type} = $1;
+	    }
+	}
+	elsif($throughput_type eq "average")
+	{
+	    if (/Average Throughput: ( {0,2}[0-9]+\.[0-9]{2}) MB\/s/) {
+		$results{$num_procs}{$xfer_size}[$type]{$avg_type} = $1;
+	    }
+	}
+}
+
+sub usage {
+	print "Usage: gen_reporl.pl [options] FILE
+	options are:\n
+	-data_type \"data_type\" plots the results for \"write-only\",\"read-only\", \"write-close\", or \"read-close\" (default is write-only)\n
+	-buffer_size \"buffer_size\" plots data from this buffer size (in kilobytes, default is 128)\n
+	-procs \"num_procs\" plots data from the run with num_procs processors (default is the highest number of processors for which there is data).\n
+	-throughput \"throughput_type\" plots either the \"max\", \"min\", or \"average\" throughput (default is average)\n
+	-io_type  \"io_type\" where \"io_type\" is the bitwise or of the io_type for which plotting is desired (1 for POSIX, 2 for MPIO, 4 for PHDF5 (default is 7 (all))\n
+	-3d	if present, does a 3d plot in addition to the normal ones\n";
+			
+	exit 1;
+}
+
+sub create_excel_output_header {
+	my $output_header;
+	my $kb = 1024;
+	my $mb = $kb * $kb;
+
+	foreach my $key (sort { $a <=> $b } keys(%{$results{$num_procs}})) {
+		if ($key < $mb) {
+			$key /= $kb;
+			$output_header .= "\t". $key . "K";
+		} else {
+			$key /= $mb;
+			$output_header .= "\t". $key . "M";
+		}
+	}
+
+	$output_header;
+}
+
+sub create_excel_output_string {
+	my ($t) = @_;
+	my $output_content = "";
+
+	foreach my $procs (sort { $b <=> $a } keys(%results)) {
+		$output_content .= "\n$procs Procs";
+		$output_content .= "\n" . create_excel_output_header;
+		$output_content .= "\n  POSIX";
+
+		foreach my $xfer (sort { $a <=> $b } keys(%{$results{$procs}})) {
+			$output_content .= "\t$results{$procs}{$xfer}[0]{$t}";
+		}
+
+		$output_content .= "\n  MPIO";
+
+		foreach my $xfer (sort { $a <=> $b } keys(%{$results{$procs}})) {
+			$output_content .= "\t$results{$procs}{$xfer}[1]{$t}";
+		}
+
+		$output_content .= "\n  PHDF5";
+
+		foreach my $xfer (sort { $a <=> $b } keys(%{$results{$procs}})) {
+			$output_content .= "\t$results{$procs}{$xfer}[2]{$t}";
+		}
+
+		$output_content .= "\n";
+	}
+
+	$output_content;
+}
+
+sub is_defined {
+	my ($t) = @_;
+	my $def = 1;
+
+	foreach my $procs (sort { $b <=> $a } keys(%results)) {
+		foreach my $xfer (sort { $a <=> $b } keys(%{$results{$procs}})) {
+			if (!defined($results{$procs}{$xfer}[0]{$t})) {
+				$def = 0;
+			}
+		}
+
+		foreach my $xfer (sort { $a <=> $b } keys(%{$results{$procs}})) {
+			if (!defined($results{$procs}{$xfer}[0]{$t})) {
+				$def = 0;
+			}
+		}
+
+		foreach my $xfer (sort { $a <=> $b } keys(%{$results{$procs}})) {
+			if (!defined($results{$procs}{$xfer}[0]{$t})) {
+				$def = 0;
+			}
+		}
+	}
+
+	$def;
+}
+
+sub write_excel_file {
+	print EXCEL_OUTPUT "\nWrite-Only\n";
+	print EXCEL_OUTPUT create_excel_output_string("write-only");
+	print EXCEL_OUTPUT "\nWrite-Close\n";
+	print EXCEL_OUTPUT create_excel_output_string("write-close");
+
+	if (is_defined("read-only")) {
+		print EXCEL_OUTPUT "\nRead-Only\n";
+		print EXCEL_OUTPUT create_excel_output_string("read-only");
+		print EXCEL_OUTPUT "\nRead-Close\n";
+		print EXCEL_OUTPUT create_excel_output_string("read-close");
+	}
+}
+
+sub create_ascii_output_header {
+	my $output_header = " " x 12 . "|";
+	my $kb = 1024;
+	my $mb = $kb * $kb;
+
+	foreach my $key (sort { $a <=> $b } keys(%{$results{$num_procs}})) {
+		if ($key < $mb) {
+			$key /= $kb;
+			$output_header = sprintf("$output_header   %-4s   |", $key .  "K");
+		} else {
+			$key /= $mb;
+			$output_header = sprintf("$output_header   %-4s   |", $key .  "M");
+		}
+	}
+
+	$output_header;
+}
+
+sub create_ascii_output_string {
+	my ($t) = @_;
+	my $output_content = "";
+	my $output_header = create_ascii_output_header;
+
+	foreach my $procs (sort { $b <=> $a } keys(%results)) {
+		$output_content .= "\n$procs Procs";
+		$output_content .= "\n$output_header\n";
+		$output_content .= "-" x length($output_header);
+		$output_content .= "\n     POSIX  |";
+
+		foreach my $xfer (sort { $a <=> $b } keys(%{$results{$procs}})) {
+			$output_content = sprintf("$output_content   %-6s |",
+									   $results{$procs}{$xfer}[0]{$t});
+		}
+
+		$output_content .= "\n    ";
+		$output_content .= "-" x (length($output_header) - 4);
+		$output_content .= "\n     MPI/IO |";
+
+		foreach my $xfer (sort { $a <=> $b } keys(%{$results{$procs}})) {
+			$output_content = sprintf("$output_content   %-6s |",
+									   $results{$procs}{$xfer}[1]{$t});
+		}
+
+		$output_content .= "\n    ";
+		$output_content .= "-" x (length($output_header) - 4);
+		$output_content .= "\n     PHDF5  |";
+
+		foreach my $xfer (sort { $a <=> $b } keys(%{$results{$procs}})) {
+			$output_content = sprintf("$output_content   %-6s |",
+									   $results{$procs}{$xfer}[2]{$t});
+		}
+
+		$output_content .= "\n";
+		$output_content .= "=" x length($output_header);
+		$output_content .= "\n";
+	}
+
+	$output_content;
+}
+
+sub write_ascii_file {
+	print ASCII_OUTPUT "\nWrite-Only";
+	print ASCII_OUTPUT "\n----------\n";
+	print ASCII_OUTPUT create_ascii_output_string("write-only");
+	print ASCII_OUTPUT "\n\nWrite-Close";
+	print ASCII_OUTPUT "\n-----------\n";
+	print ASCII_OUTPUT create_ascii_output_string("write-close");
+
+	if (is_defined("read-only")) {
+		print ASCII_OUTPUT "\n\nRead-Only";
+		print ASCII_OUTPUT "\n---------\n";
+		print ASCII_OUTPUT create_ascii_output_string("read-only");
+		print ASCII_OUTPUT "\n\nRead-Close";
+		print ASCII_OUTPUT "\n----------\n";
+		print ASCII_OUTPUT create_ascii_output_string("read-close");
+	}
+}
+
+sub draw_plot
+{
+    my($p_3d) = @_;
+    
+    if($p_3d)
+    {
+	$counter = 3;
+	print GNUPLOT_PIPE "splot ";
+    }
+    else
+    {
+	$counter = 2;
+	print GNUPLOT_PIPE "plot ";
+    }
+
+    if($io_type & 1) {
+	print GNUPLOT_PIPE " \"gnuplot.data\" using 1:";
+	
+	if($p_3d) { print GNUPLOT_PIPE "2:"; }       
+	
+	print GNUPLOT_PIPE $counter . " title 'POSIX' with linespoints";
+	$counter = $counter + 1;
+    }
+    if($io_type & 2) {
+	if($io_type & 1) { print GNUPLOT_PIPE ", "; }
+	print GNUPLOT_PIPE  "\"gnuplot.data\" using 1:";
+	
+	if($p_3d) { print GNUPLOT_PIPE "2:"; }       
+	
+	print GNUPLOT_PIPE  $counter . " title 'MPIO' with linespoints";
+	$counter = $counter + 1;
+	if($io_type & 4) { print GNUPLOT_PIPE ", ";}
+    }
+    if($io_type & 4) {
+	print GNUPLOT_PIPE "  \"gnuplot.data\" using 1:";
+	
+	if($p_3d) { print GNUPLOT_PIPE "2:"; }       
+	
+	print GNUPLOT_PIPE  $counter . " title 'PHDF5' with linespoints";
+
+    }
+    print GNUPLOT_PIPE "\n";
+}
+
+
+sub plot_default_graph1 {
+	open(GNUPLOT_DATA_OUTPUT, ">gnuplot.data") or
+		die "error: cannot open file gnuplot.data: $!\n";
+	
+	$transfer_buffer_size = 128 if !$transfer_buffer_size;
+	$data_type = "write-only" if !$data_type;
+
+	#set up the plot
+	print GNUPLOT_PIPE  "set term x11 1\n";
+	print GNUPLOT_PIPE  "set xlabel \"Number of Processors\"\n";
+	print GNUPLOT_PIPE  "set title \"" . $data_type . " Performance (Speed vs. Num. Procs)\"\n";
+	print GNUPLOT_PIPE  "set ylabel \"Bandwdith (MB/s)\"\n";
+	print GNUPLOT_PIPE  "set label 1 \"Transfer buffer size: " . $transfer_buffer_size . "K\" at graph 0.7, graph 0.7 left \n";
+
+#the next line attempts to hack gnuplot to get around it's inability to linearly scale, but logarithmically label an axis
+	print GNUPLOT_PIPE  "set xtics (\"1\" 1, \"2\" 2, \"4\" 4, \"8\" 8, \"16\" 16, \"32\" 32, \"64\" 64, \"128\" 128, \"256\" 256, \"512\" 512, \"1024\" 1024)\n";
+
+
+	foreach $proc (sort { $a <=> $b }( keys %results )) 
+	{
+	    print GNUPLOT_DATA_OUTPUT $proc . "\t";
+	    if($io_type & 1) {
+		print GNUPLOT_DATA_OUTPUT $results{$proc}{$transfer_buffer_size*1024}[0]{$data_type} . "\t";
+	    }
+	    if($io_type & 2) {
+		print GNUPLOT_DATA_OUTPUT $results{$proc}{$transfer_buffer_size*1024}[1]{$data_type}. "\t";
+	    }
+	    if($io_type & 4) {
+		print GNUPLOT_DATA_OUTPUT $results{$proc}{$transfer_buffer_size*1024}[2]{$data_type};
+	    }
+	    print GNUPLOT_DATA_OUTPUT "\n";
+
+	}
+
+	close(GNUPLOT_DATA_OUTPUT); 
+
+	draw_plot(0);
+	
+	unlink(GNUPLOT_DATA_OUTPUT);
+
+}
+
+
+sub plot_default_graph2 {
+	open(GNUPLOT_DATA_OUTPUT, ">gnuplot.data") or
+		die "error: cannot open file gnuplot.data: $!\n";
+	
+	$num_procs_graph = max(sort { $a <=> $b }( keys %results )) if !$num_procs_graph;
+	print "min-rpocs: " . $num_procs_graph;
+	$data_type = "write-only" if !$data_type;
+
+	#set up the plot
+	print GNUPLOT_PIPE  "set term x11 2\n";
+	print GNUPLOT_PIPE  "set xlabel \"Transfer Buffer Size (in bytes)\"\n";
+	print GNUPLOT_PIPE  "set title \"" . $data_type . " Performance (Speed vs. Transfer Buffer Size)\"\n";
+	print GNUPLOT_PIPE  "set ylabel \"Bandwdith (MB/s)\"\n";
+	print GNUPLOT_PIPE  "set label 1 \"Procs: " . $num_procs_graph . "\" at graph 0.7, graph 0.7 left \n";
+
+#the next line attempts to hack gnuplot to get around it's inability to linearly scale, but logarithmically label an axis
+	print GNUPLOT_PIPE  "set xtics (\"4K\" 4*1024, \"8K\" 8*1024, \"16K\" 16*1024, \"32K\" 32*1024, \"64K\" 64*1024, \"128K\" 128*1024, \"256K\" 256*1024, \"512K\" 512*1024, \"1M\" 1024*1024, \"2M\" 2048*1024, \"4M\" 4096*1024, \"8M\" 8192*1024, \"16M\" 16384*1024)\n";
+
+	foreach $xfer (sort {$a <=> $b} ( keys %{$results{$num_procs_graph}} )) 
+	{
+	    print GNUPLOT_DATA_OUTPUT $xfer . "\t";
+	    if($io_type & 1) {
+		print GNUPLOT_DATA_OUTPUT $results{$num_procs_graph}{$xfer}[0]{$data_type} . "\t";
+	    }
+	    if($io_type & 2) {
+		print GNUPLOT_DATA_OUTPUT $results{$num_procs_graph}{$xfer}[1]{$data_type}. "\t";		
+	    }
+	    if($io_type & 4) {
+		print GNUPLOT_DATA_OUTPUT $results{$num_procs_graph}{$xfer}[2]{$data_type};
+	    }
+	    print GNUPLOT_DATA_OUTPUT "\n";
+
+     	}
+	
+	close(GNUPLOT_DATA_OUTPUT); 
+
+	draw_plot(0);
+	
+	unlink(GNUPLOT_DATA_OUTPUT);
+}
+
+sub plot_3d_graph3 {
+	open(GNUPLOT_DATA_OUTPUT, ">gnuplot.data") or
+		die "error: cannot open file gnuplot.data: $!\n";
+
+	#set up the plot
+	print GNUPLOT_PIPE  "set term x11 3\n";
+	print GNUPLOT_PIPE  "set xlabel \"Num. Processors\"\n";
+	print GNUPLOT_PIPE  "set title \"Write Speed v. No. Procs v. Buffer Size\"\n";
+	print GNUPLOT_PIPE  "set ylabel \"Buffer Size (bytes)\"\n";
+	print GNUPLOT_PIPE  "set zlabel \"Bandwidth (in MB/s)\"\n";
+	print GNUPLOT_PIPE  "set nolabel\n";
+	print GNUPLOT_PIPE  "set dgrid3d 30,30\n";
+	print GNUPLOT_PIPE  "set hidden3d\n";
+
+#the next lines attempts to hack gnuplot to get around it's inability to linearly scale, but logarithmically label an axis
+	print GNUPLOT_PIPE  "set xtics (\"1\" 1, \"2\" 2, \"4\" 4, \"8\" 8, \"16\" 16, \"32\" 32, \"64\" 64, \"128\" 128, \"256\" 256, \"512\" 512, \"1024\" 1024)\n";
+	print GNUPLOT_PIPE  "set ytics (\"4K\" 4*1024, \"8K\" 8*1024, \"16K\" 16*1024, \"32K\" 32*1024, \"64K\" 64*1024, \"128K\" 128*1024, \"256K\" 256*1024, \"512K\" 512*1024, \"1M\" 1024*1024, \"2M\" 2048*1024, \"4M\" 4096*1024, \"8M\" 8192*1024, \"16M\" 16384*1024)\n";
+
+
+#Read speed on z-axis, processors on x, buffer size on y.
+
+	foreach $proc (sort { $a <=> $b }( keys %results )) 
+	{
+	    foreach $xfer (sort {$a <=> $b} ( keys %{$results{$proc}} )) 
+	    {
+		print GNUPLOT_DATA_OUTPUT $proc . "\t" . $xfer . "\t";
+		if($io_type & 1) {
+		    print GNUPLOT_DATA_OUTPUT $results{$proc}{$xfer}[0]{"write-only"} . "\t";		
+		}
+		if($io_type & 2) {
+		    print GNUPLOT_DATA_OUTPUT $results{$proc}{$xfer}[1]{"write-only"}. "\t";		
+		}
+		if($io_type & 4) {
+		    print GNUPLOT_DATA_OUTPUT $results{$proc}{$xfer}[2]{"write-only"};
+		}
+	    print GNUPLOT_DATA_OUTPUT "\n";
+
+	    }
+	}
+	
+	close(GNUPLOT_DATA_OUTPUT); 
+	
+	draw_plot(1);
+	
+	unlink(GNUPLOT_DATA_OUTPUT);
+}
+
+open(GNUPLOT_PIPE, "| tee gnuplot.script | gnuplot -persist") || die "Couldn't run gnuplot: $!\n";
+GNUPLOT_PIPE->autoflush(1);
+
+write_excel_file;
+write_ascii_file;
+plot_default_graph1;
+sleep 1;
+plot_default_graph2;
+sleep 1;
+
+plot_3d_graph3 if $plot_3d;
+close(GNUPLOT_PIPE);
diff --git a/tools/perform/iopipe.c b/tools/perform/iopipe.c
new file mode 100644
index 0000000..85063fa
--- /dev/null
+++ b/tools/perform/iopipe.c
@@ -0,0 +1,503 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Programmer:  Robb Matzke <matzke@llnl.gov>
+ *              Thursday, March 12, 1998
+ */
+
+/* See H5private.h for how to include headers */
+#include "hdf5.h"
+
+#include "H5private.h"
+
+#ifdef H5_HAVE_SYS_TIMEB
+#include <sys/timeb.h>
+#endif
+
+
+#define RAW_FILE_NAME  "iopipe.raw"
+#define HDF5_FILE_NAME  "iopipe.h5"
+#define HEADING    "%-16s"
+#define PROGRESS  '='
+
+#if 0
+/* Normal testing */
+#define REQUEST_SIZE_X  4579
+#define REQUEST_SIZE_Y  4579
+#define NREAD_REQUESTS  45
+#define NWRITE_REQUESTS  45
+#else
+/* Speedy testing */
+#define REQUEST_SIZE_X  1000
+#define REQUEST_SIZE_Y  1000
+#define NREAD_REQUESTS  45
+#define NWRITE_REQUESTS  45
+#endif
+
+
+/*-------------------------------------------------------------------------
+ * Function:  print_stats
+ *
+ * Purpose:  Prints statistics
+ *
+ * Return:  void
+ *
+ * Programmer:  Robb Matzke
+ *              Thursday, March 12, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifdef H5_HAVE_GETRUSAGE
+static void
+print_stats (const char *prefix,
+       struct rusage *r_start, struct rusage *r_stop,
+       struct timeval *t_start, struct timeval *t_stop,
+       size_t nbytes)
+#else /* H5_HAVE_GETRUSAGE */
+static void
+print_stats (const char *prefix,
+       struct timeval *r_start, struct timeval *r_stop,
+       struct timeval *t_start, struct timeval *t_stop,
+       size_t nbytes)
+#endif /* H5_HAVE_GETRUSAGE */
+{
+    double  e_time, bw;
+#ifdef H5_HAVE_GETRUSAGE
+    double  u_time, s_time;
+
+    u_time = ((double)(r_stop->ru_utime.tv_sec)+
+        (double)(r_stop->ru_utime.tv_usec)/1000000.0) -
+       ((double)(r_start->ru_utime.tv_sec)+
+        (double)(r_start->ru_utime.tv_usec)/1000000.0);
+
+    s_time = ((double)(r_stop->ru_stime.tv_sec)+
+        (double)(r_stop->ru_stime.tv_usec)/1000000.0) -
+       ((double)(r_start->ru_stime.tv_sec)+
+        (double)(r_start->ru_stime.tv_usec)/1000000.0);
+#endif
+#ifndef H5_HAVE_SYS_TIMEB
+    e_time = ((double)(t_stop->tv_sec)+
+        (double)(t_stop->tv_usec)/1000000.0) -
+       ((double)(t_start->tv_sec)+
+        (double)(t_start->tv_usec)/1000000.0);
+#else
+    e_time = ((double)(t_stop->tv_sec)+
+        (double)(t_stop->tv_usec)/1000.0) -
+       ((double)(t_start->tv_sec)+
+        (double)(t_start->tv_usec)/1000.0);
+#endif
+    bw = (double)nbytes / e_time;
+
+#ifdef H5_HAVE_GETRUSAGE
+    printf (HEADING "%1.2fuser %1.2fsystem %1.2felapsed %1.2fMB/s\n",
+      prefix, u_time, s_time, e_time, bw/(1024*1024));
+#else
+    printf (HEADING "%1.2felapsed %1.2fMB/s\n",
+      prefix, e_time, bw/(1024*1024));
+#endif
+
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:  synchronize
+ *
+ * Purpose:
+ *
+ * Return:  void
+ *
+ * Programmer:  Robb Matzke
+ *              Thursday, March 12, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static void
+synchronize (void)
+{
+#ifdef H5_HAVE_SYSTEM
+#if defined(H5_HAVE_WIN32_API) && ! defined(__CYGWIN__)
+    _flushall();
+#else
+    HDsystem("sync");
+    HDsystem("df >/dev/null");
+#endif
+#endif
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:  main
+ *
+ * Purpose:
+ *
+ * Return:  Success:
+ *
+ *    Failure:
+ *
+ * Programmer:  Robb Matzke
+ *              Thursday, March 12, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+main (void)
+{
+    static hsize_t  size[2] = {REQUEST_SIZE_X, REQUEST_SIZE_Y};
+    static unsigned  nread = NREAD_REQUESTS, nwrite = NWRITE_REQUESTS;
+
+    unsigned char  *the_data = NULL;
+    hid_t    file, dset, file_space = -1;
+    herr_t    status;
+#ifdef H5_HAVE_GETRUSAGE
+    struct rusage  r_start, r_stop;
+#else
+    struct timeval r_start, r_stop;
+#endif
+    struct timeval  t_start, t_stop;
+    int      fd;
+    unsigned    u;
+    hssize_t    n;
+    off_t    offset;
+    hsize_t    start[2];
+    hsize_t    count[2];
+
+
+#ifdef H5_HAVE_SYS_TIMEB
+  struct _timeb *tbstart = malloc(sizeof(struct _timeb));
+  struct _timeb *tbstop = malloc(sizeof(struct _timeb));
+#endif
+    /*
+     * The extra cast in the following statement is a bug workaround for the
+     * Win32 version 5.0 compiler.
+     * 1998-11-06 ptl
+     */
+    printf ("I/O request size is %1.1fMB\n",
+      (double)(hssize_t)(size[0]*size[1])/1024.0*1024);
+
+    /* Open the files */
+    file = H5Fcreate (HDF5_FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+    assert (file>=0);
+    fd = HDopen (RAW_FILE_NAME, O_RDWR|O_CREAT|O_TRUNC, 0666);
+    assert (fd>=0);
+
+    /* Create the dataset */
+    file_space = H5Screate_simple (2, size, size);
+    assert(file_space >= 0);
+    dset = H5Dcreate2(file, "dset", H5T_NATIVE_UCHAR, file_space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+    assert(dset >= 0);
+    the_data = (unsigned char *)malloc((size_t)(size[0] * size[1]));
+
+    /* initial fill for lazy malloc */
+    HDmemset(the_data, 0xAA, (size_t)(size[0] * size[1]));
+
+    /* Fill raw */
+    synchronize ();
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_start);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_start, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstart);
+#endif
+#endif
+    fprintf (stderr, HEADING, "fill raw");
+    for(u = 0; u < nwrite; u++) {
+  putc (PROGRESS, stderr);
+  HDfflush(stderr);
+  HDmemset(the_data, 0xAA, (size_t)(size[0]*size[1]));
+    }
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_stop);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_stop, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstop);
+  t_start.tv_sec = tbstart->time;
+  t_start.tv_usec = tbstart->millitm;
+  t_stop.tv_sec = tbstop->time;
+  t_stop.tv_usec = tbstop->millitm;
+#endif
+#endif
+    putc ('\n', stderr);
+    print_stats ("fill raw",
+     &r_start, &r_stop, &t_start, &t_stop,
+     (size_t)(nread*size[0]*size[1]));
+
+
+    /* Fill hdf5 */
+    synchronize ();
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_start);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_start, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstart);
+#endif
+#endif
+    fprintf (stderr, HEADING, "fill hdf5");
+    for(u = 0; u < nread; u++) {
+  putc (PROGRESS, stderr);
+  HDfflush(stderr);
+  status = H5Dread (dset, H5T_NATIVE_UCHAR, file_space, file_space,
+        H5P_DEFAULT, the_data);
+  assert (status>=0);
+    }
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_stop);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_stop, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstop);
+  t_start.tv_sec = tbstart->time;
+  t_start.tv_usec = tbstart->millitm;
+  t_stop.tv_sec = tbstop->time;
+  t_stop.tv_usec = tbstop->millitm;
+#endif
+#endif
+    putc ('\n', stderr);
+    print_stats ("fill hdf5",
+     &r_start, &r_stop, &t_start, &t_stop,
+     (size_t)(nread*size[0]*size[1]));
+
+    /* Write the raw dataset */
+    synchronize ();
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_start);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_start, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstart);
+#endif
+#endif
+    fprintf (stderr, HEADING, "out raw");
+    for(u = 0; u < nwrite; u++) {
+  putc (PROGRESS, stderr);
+  HDfflush(stderr);
+  offset = HDlseek (fd, (off_t)0, SEEK_SET);
+  assert (0==offset);
+  n = HDwrite (fd, the_data, (size_t)(size[0]*size[1]));
+  assert (n>=0 && (size_t)n==size[0]*size[1]);
+    }
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_stop);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_stop, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstop);
+  t_start.tv_sec = tbstart->time;
+  t_start.tv_usec = tbstart->millitm;
+  t_stop.tv_sec = tbstop->time;
+  t_stop.tv_usec = tbstop->millitm;
+#endif
+#endif
+    putc ('\n', stderr);
+    print_stats ("out raw",
+     &r_start, &r_stop, &t_start, &t_stop,
+     (size_t)(nread*size[0]*size[1]));
+
+    /* Write the hdf5 dataset */
+    synchronize ();
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_start);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_start, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstart);
+#endif
+#endif
+    fprintf (stderr, HEADING, "out hdf5");
+    for(u = 0; u < nwrite; u++) {
+  putc (PROGRESS, stderr);
+  HDfflush(stderr);
+  status = H5Dwrite (dset, H5T_NATIVE_UCHAR, H5S_ALL, H5S_ALL,
+         H5P_DEFAULT, the_data);
+  assert (status>=0);
+    }
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_stop);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_stop, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstop);
+  t_start.tv_sec = tbstart->time;
+  t_start.tv_usec = tbstart->millitm;
+  t_stop.tv_sec = tbstop->time;
+  t_stop.tv_usec = tbstop->millitm;
+#endif
+#endif
+    putc ('\n', stderr);
+    print_stats ("out hdf5",
+     &r_start, &r_stop, &t_start, &t_stop,
+     (size_t)(nread*size[0]*size[1]));
+
+    /* Read the raw dataset */
+    synchronize ();
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_start);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_start, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstart);
+#endif
+#endif
+    fprintf (stderr, HEADING, "in raw");
+    for(u = 0; u < nread; u++) {
+  putc (PROGRESS, stderr);
+  HDfflush(stderr);
+  offset = HDlseek (fd, (off_t)0, SEEK_SET);
+  assert (0==offset);
+  n = HDread (fd, the_data, (size_t)(size[0]*size[1]));
+  assert (n>=0 && (size_t)n==size[0]*size[1]);
+    }
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_stop);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_stop, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstop);
+  t_start.tv_sec = tbstart->time;
+  t_start.tv_usec = tbstart->millitm;
+  t_stop.tv_sec = tbstop->time;
+  t_stop.tv_usec = tbstop->millitm;
+#endif
+#endif
+    putc ('\n', stderr);
+    print_stats ("in raw",
+     &r_start, &r_stop, &t_start, &t_stop,
+     (size_t)(nread*size[0]*size[1]));
+
+
+    /* Read the hdf5 dataset */
+    synchronize ();
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_start);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_start, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstart);
+#endif
+#endif
+    fprintf (stderr, HEADING, "in hdf5");
+    for(u = 0; u < nread; u++) {
+  putc (PROGRESS, stderr);
+  HDfflush(stderr);
+  status = H5Dread (dset, H5T_NATIVE_UCHAR, file_space, file_space,
+        H5P_DEFAULT, the_data);
+  assert (status>=0);
+    }
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_stop);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_stop, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstop);
+  t_start.tv_sec = tbstart->time;
+  t_start.tv_usec = tbstart->millitm;
+  t_stop.tv_sec = tbstop->time;
+  t_stop.tv_usec = tbstop->millitm;
+#endif
+#endif
+    putc ('\n', stderr);
+    print_stats ("in hdf5",
+     &r_start, &r_stop, &t_start, &t_stop,
+     (size_t)(nread*size[0]*size[1]));
+
+    /* Read hyperslab */
+    assert (size[0]>20 && size[1]>20);
+    start[0] = start[1] = 10;
+    count[0] = count[1] = size[0]-20;
+    status = H5Sselect_hyperslab (file_space, H5S_SELECT_SET, start, NULL, count, NULL);
+    assert (status>=0);
+    synchronize ();
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_start);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_start, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstart);
+#endif
+#endif
+    fprintf (stderr, HEADING, "in hdf5 partial");
+    for(u = 0; u < nread; u++) {
+  putc (PROGRESS, stderr);
+  HDfflush(stderr);
+  status = H5Dread (dset, H5T_NATIVE_UCHAR, file_space, file_space,
+        H5P_DEFAULT, the_data);
+  assert (status>=0);
+    }
+#ifdef H5_HAVE_GETRUSAGE
+    HDgetrusage(RUSAGE_SELF, &r_stop);
+#endif
+#ifdef H5_HAVE_GETTIMEOFDAY
+    HDgettimeofday(&t_stop, NULL);
+#else
+#ifdef H5_HAVE_SYS_TIMEB
+  _ftime(tbstop);
+  t_start.tv_sec = tbstart->time;
+  t_start.tv_usec = tbstart->millitm;
+  t_stop.tv_sec = tbstop->time;
+  t_stop.tv_usec = tbstop->millitm;
+#endif
+#endif
+    putc('\n', stderr);
+    print_stats("in hdf5 partial",
+     &r_start, &r_stop, &t_start, &t_stop,
+     (size_t)(nread*count[0]*count[1]));
+
+
+
+    /* Close everything */
+    HDclose(fd);
+    H5Dclose(dset);
+    H5Sclose(file_space);
+    H5Fclose(file);
+    free(the_data);
+
+    return 0;
+}
+
diff --git a/tools/perform/overhead.c b/tools/perform/overhead.c
new file mode 100644
index 0000000..9341e64
--- /dev/null
+++ b/tools/perform/overhead.c
@@ -0,0 +1,416 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Programmer:  Robb Matzke <matzke@llnl.gov>
+ *              Monday, September 28, 1998
+ *
+ * Purpose:  Creates a chunked dataset and measures the storage overhead.
+ */
+
+/* See H5private.h for how to include headers */
+#undef NDEBUG
+#include "hdf5.h"
+#include "H5private.h"
+
+#ifdef H5_STDC_HEADERS
+#   include <ctype.h>
+#   include <fcntl.h>
+#   include <stdlib.h>
+#   include <sys/stat.h>
+#   include <string.h>
+#endif
+
+#ifdef H5_HAVE_IO_H
+#   include <io.h>
+#endif
+
+#ifdef H5_HAVE_UNISTD_H
+#   include <sys/types.h>
+#   include <unistd.h>
+#endif
+
+#ifdef H5_HAVE_IO_H
+#   include <io.h>
+#endif
+
+#ifndef H5_HAVE_ATTRIBUTE
+#   undef __attribute__
+#   define __attribute__(X) /*void*/
+#   define UNUSED /*void*/
+#else
+#   define UNUSED __attribute__((unused))
+#endif
+
+#define FILE_NAME_1  "overhead.h5"
+#ifndef FALSE
+#define FALSE    0
+#endif /* FALSE */
+#ifndef TRUE
+#define TRUE    1
+#endif /* TRUE */
+
+typedef enum fill_t {
+    FILL_ALL,
+    FILL_FORWARD,
+    FILL_REVERSE,
+    FILL_INWARD,
+    FILL_OUTWARD,
+    FILL_RANDOM
+} fill_t;
+
+
+/*-------------------------------------------------------------------------
+ * Function:  usage
+ *
+ * Purpose:  Prints a usage message and exits.
+ *
+ * Return:  never returns
+ *
+ * Programmer:  Robb Matzke
+ *              Wednesday, September 30, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static void
+usage(const char *prog)
+{
+    fprintf(stderr, "usage: %s [STYLE|cache] [LEFT [MIDDLE [RIGHT]]]\n",
+      prog);
+    fprintf(stderr, "\
+    STYLE is the order that the dataset is filled and should be one of:\n\
+        forward   --  Fill the dataset from lowest address to highest\n\
+                      address. This style tests the right split ratio.\n\
+        reverse   --  Fill the dataset from highest address to lowest\n\
+                      address.  This is the reverse order of `forward' and\n\
+                      tests the left split ratio.\n\
+        inward    --  Fill beginning at both the lowest and highest\n\
+                      addresses and work in toward the center of the\n\
+                      dataset.  This tests the middle split ratio.\n\
+        outward   --  Start at the center of the dataset and work outward\n\
+                      toward the lowest and highest addresses.  This tests\n\
+                      both left and right split ratios.\n\
+        random    --  Write the chunks of the dataset in random order.  This\n\
+                      tests all split ratios.\n\
+    If no fill style is specified then all fill styles are tried and a\n\
+    single value is printed for each one.\n\
+\n\
+    If the word `cache' is used instead of a fill style then the raw data\n\
+    cache is enabled.  It is not possible to enable the raw data cache when\n\
+    a specific fill style is used because H5Fflush() is called after each\n\
+    chunk is written in order to calculate overhead during the test.  If\n\
+    the cache is enabled then chunks are written to disk in different orders\n\
+    than the actual H5Dwrite() calls in the test due to collisions and the\n\
+    resulting B-tree will be split differently.\n\
+\n\
+    LEFT, MIDDLE, and RIGHT are the ratios to use for splitting and should\n\
+    be values between zero and one, inclusive.\n");
+    exit(1);
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:  cleanup
+ *
+ * Purpose:  Removes test files
+ *
+ * Return:  void
+ *
+ * Programmer:  Robb Matzke
+ *              Thursday, June  4, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static void
+cleanup (void)
+{
+    if (!getenv ("HDF5_NOCLEANUP")) {
+  remove (FILE_NAME_1);
+    }
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:  display_error_cb
+ *
+ * Purpose:  Displays the error stack after printing "*FAILED*".
+ *
+ * Return:  Success:  0
+ *
+ *    Failure:  -1
+ *
+ * Programmer:  Robb Matzke
+ *    Wednesday, March  4, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+display_error_cb (hid_t estack, void UNUSED *client_data)
+{
+    puts ("*FAILED*");
+    H5Eprint2(estack, stdout);
+
+    return 0;
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:  test
+ *
+ * Purpose:  The guts of the test
+ *
+ * Return:  Success:  0
+ *
+ *    Failure:  number of errors
+ *
+ * Programmer:  Robb Matzke
+ *              Wednesday, September 30, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+test(fill_t fill_style, const double splits[],
+     hbool_t verbose, hbool_t use_rdcc)
+{
+    hid_t  file = (-1), fapl = (-1), dcpl = (-1), xfer = (-1), mspace = (-1), fspace = (-1), dset = (-1);
+    hsize_t  ch_size[1] = {1};    /*chunk size    */
+    hsize_t  cur_size[1] = {1000};    /*current dataset size  */
+    hsize_t  max_size[1] = {H5S_UNLIMITED};  /*maximum dataset size  */
+    hsize_t  hs_start[1];      /*hyperslab start offset*/
+    hsize_t  hs_count[1] = {1};    /*hyperslab nelmts  */
+    int    fd = (-1);      /*h5 file direct  */
+    int  *had = NULL;      /*for random filling  */
+    const char  *sname=NULL;      /*fill style nam  */
+    int    mdc_nelmts;      /*num meta objs to cache*/
+    hsize_t  i;
+    int    j;
+    h5_stat_t  sb;
+
+    if((fapl = H5Pcreate(H5P_FILE_ACCESS)) < 0) goto error;
+    if(!use_rdcc) {
+        if(H5Pget_cache(fapl, &mdc_nelmts, NULL, NULL, NULL) < 0) goto error;
+        if(H5Pset_cache(fapl, mdc_nelmts, 0, 0, 0.0) < 0) goto error;
+    }
+    if((file = H5Fcreate(FILE_NAME_1, H5F_ACC_TRUNC, H5P_DEFAULT, fapl)) < 0) goto error;
+    if((dcpl = H5Pcreate(H5P_DATASET_CREATE)) < 0) goto error;
+    if(H5Pset_chunk(dcpl, 1, ch_size) < 0) goto error;
+    if((xfer = H5Pcreate(H5P_DATASET_XFER)) < 0) goto error;
+    if(H5Pset_btree_ratios(xfer, splits[0], splits[1], splits[2]) < 0) goto error;
+    if((fspace = H5Screate_simple(1, cur_size, max_size)) < 0) goto error;
+    if((mspace = H5Screate_simple(1, ch_size, ch_size)) < 0) goto error;
+    if((dset = H5Dcreate2(file, "chunked", H5T_NATIVE_INT,
+        fspace, H5P_DEFAULT, dcpl, H5P_DEFAULT)) < 0) goto error;
+    if ((fd=HDopen(FILE_NAME_1, O_RDONLY, 0666)) < 0) goto error;
+
+    if(FILL_RANDOM==fill_style) 
+        had = calloc((size_t)cur_size[0], sizeof(int));
+    
+    for (i=1; i<=cur_size[0]; i++) {
+
+        /* Decide which chunk to write to */
+        switch (fill_style) {
+        case FILL_FORWARD:
+            hs_start[0] = i-1;
+            break;
+        case FILL_REVERSE:
+            hs_start[0] = cur_size[0]-i;
+            break;
+        case FILL_INWARD:
+            hs_start[0] = i%2 ? i/2 : cur_size[0]-i/2;
+            break;
+        case FILL_OUTWARD:
+            j = (int)(cur_size[0]-i)+1;
+            hs_start[0] = j%2 ? j/2 : (hssize_t)cur_size[0]-j/2;
+            break;
+        case FILL_RANDOM:
+            for (j=HDrand()%(int)cur_size[0]; had[j]; j=(j+1)%(int)cur_size[0])
+                /*void*/;
+            hs_start[0] = j;
+            had[j] = 1;
+            break;
+        case FILL_ALL:
+            abort();
+        default:
+            /* unknown request */
+            HDfprintf(stderr, "Unknown fill style\n");
+            goto error;
+            break;
+        }
+
+        /* Write the chunk */
+        if (H5Sselect_hyperslab(fspace, H5S_SELECT_SET, hs_start, NULL,
+                hs_count, NULL) < 0) goto error;
+        if (H5Dwrite(dset, H5T_NATIVE_INT, mspace, fspace, xfer, &i) < 0) {
+            goto error;
+        }
+
+        /* Determine overhead */
+        if (verbose) {
+            if (H5Fflush(file, H5F_SCOPE_LOCAL) < 0) goto error;
+            if (HDfstat(fd, &sb) < 0) goto error;
+            /*
+             * The extra cast in the following statement is a bug workaround
+             * for the Win32 version 5.0 compiler.
+             * 1998-11-06 ptl
+             */
+            printf("%4lu %8.3f ***\n",
+                    (unsigned long)i,
+                    (double)(hssize_t)(sb.st_size-i*sizeof(int))/(hssize_t)i);
+        }
+    }
+
+    if(had) {
+        free(had);
+        had = NULL;
+    } /* end if */
+
+    H5Dclose(dset);
+    H5Sclose(mspace);
+    H5Sclose(fspace);
+    H5Pclose(dcpl);
+    H5Pclose(xfer);
+    H5Fclose(file);
+
+    if (!verbose) {
+        switch (fill_style) {
+        case FILL_FORWARD:
+            sname = "forward";
+            break;
+        case FILL_REVERSE:
+            sname = "reverse";
+            break;
+        case FILL_INWARD:
+            sname = "inward";
+            break;
+        case FILL_OUTWARD:
+            sname = "outward";
+            break;
+        case FILL_RANDOM:
+            sname = "random";
+            break;
+        case FILL_ALL:
+            abort();
+        default:
+            /* unknown request */
+            HDfprintf(stderr, "Unknown fill style\n");
+            goto error;
+            break;
+        }
+
+        if (HDfstat(fd, &sb) < 0) goto error;
+        printf("%-7s %8.3f\n", sname,
+                (double)(hssize_t)(sb.st_size-cur_size[0]*sizeof(int))/
+                (hssize_t)cur_size[0]);
+    }
+    HDclose(fd);
+
+    return 0;
+
+ error:
+    H5Dclose(dset);
+    H5Sclose(mspace);
+    H5Sclose(fspace);
+    H5Pclose(dcpl);
+    H5Pclose(xfer);
+    H5Fclose(file);
+    if(had)
+        free(had);
+    HDclose(fd);
+    return 1;
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:  main
+ *
+ * Purpose:
+ *
+ * Return:  Success:        zero
+ *
+ *    Failure:  non-zero
+ *
+ * Programmer:  Robb Matzke
+ *              Monday, September 28, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+main(int argc, char *argv[])
+{
+    hid_t  xfer;
+    fill_t  fill_style = FILL_ALL;
+    hbool_t  use_cache = FALSE;
+    double  splits[3];
+    int    i, j, nerrors=0;
+
+    /* Default split ratios */
+    H5Eset_auto2(H5E_DEFAULT, display_error_cb, NULL);
+
+    if((xfer = H5Pcreate(H5P_DATASET_XFER)) < 0) goto error;
+    if(H5Pget_btree_ratios(xfer, splits+0, splits+1, splits+2) < 0) goto error;
+    if(H5Pclose(xfer) < 0) goto error;
+
+    /* Parse command-line options */
+    for(i = 1, j = 0; i < argc; i++) {
+        if (!strcmp(argv[i], "forward")) {
+            fill_style = FILL_FORWARD;
+        } else if (!strcmp(argv[i], "reverse")) {
+            fill_style = FILL_REVERSE;
+        } else if (!strcmp(argv[i], "inward")) {
+            fill_style = FILL_INWARD;
+        } else if (!strcmp(argv[i], "outward")) {
+            fill_style = FILL_OUTWARD;
+        } else if (!strcmp(argv[i], "random")) {
+            fill_style = FILL_RANDOM;
+        } else if (!strcmp(argv[i], "cache")) {
+            use_cache = TRUE;
+        } else if (j<3 && (isdigit(argv[i][0]) || '.'==argv[i][0])) {
+            splits[j++] = strtod(argv[i], NULL);
+        } else {
+            usage(argv[0]);
+        }
+    }
+
+    if (FILL_ALL==fill_style) {
+        printf("%-7s %8s\n", "Style", "Bytes/Chunk");
+        printf("%-7s %8s\n", "-----", "-----------");
+        nerrors += test(FILL_FORWARD, splits, FALSE, use_cache);
+        nerrors += test(FILL_REVERSE, splits, FALSE, use_cache);
+        nerrors += test(FILL_INWARD,  splits, FALSE, use_cache);
+        nerrors += test(FILL_OUTWARD, splits, FALSE, use_cache);
+        nerrors += test(FILL_RANDOM,  splits, FALSE, use_cache);
+    } 
+    else {
+        if (use_cache) usage(argv[0]);
+        nerrors += test(fill_style,   splits, TRUE, FALSE);
+    }
+    if (nerrors>0) goto error;
+    cleanup();
+    return 0;
+
+ error:
+    fprintf(stderr, "*** ERRORS DETECTED ***\n");
+    return 1;
+}
diff --git a/tools/perform/perf.c b/tools/perform/perf.c
new file mode 100644
index 0000000..7d329f0
--- /dev/null
+++ b/tools/perform/perf.c
@@ -0,0 +1,482 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Author: Albert Cheng of NCSA, May 1, 2001.
+ * This is derived from code given to me by Robert Ross.
+ *
+ * NOTE: This code assumes that all command line arguments make it out to all
+ * the processes that make up the parallel job, which isn't always the case.
+ * So if it doesn't work on some platform, that might be why.
+ */
+
+#include "hdf5.h"
+#include "H5private.h"
+#ifdef H5_HAVE_PARALLEL
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#ifdef H5_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <errno.h>
+#include <string.h>
+#if defined(H5_TIME_WITH_SYS_TIME)
+#   include <sys/time.h>
+#   include <time.h>
+#elif defined(H5_HAVE_SYS_TIME_H)
+#   include <sys/time.h>
+#else
+#   include <time.h>
+#endif
+#include <mpi.h>
+#ifndef MPI_FILE_NULL           /*MPIO may be defined in mpi.h already       */
+#   include <mpio.h>
+#endif
+
+/* Macro definitions */
+/* Verify:
+ * if val is false (0), print mesg and if fatal is true (non-zero), die.
+ */
+#define H5FATAL 1
+#define VRFY(val, mesg, fatal) do {                                            \
+    if (!val) {                                                                \
+  	printf("Proc %d: ", mynod);                 \
+        printf("*** Assertion failed (%s) at line %4d in %s\n",                \
+      mesg, (int)__LINE__, __FILE__);                  \
+  	if (fatal){                     \
+      fflush(stdout);                   \
+      goto die_jar_jar_die;                 \
+  	}                       \
+    }                                                                          \
+} while(0)
+#define RANK 1
+#define MAX_PATH 1024
+
+hsize_t dims[RANK];     /* dataset dim sizes */
+hsize_t block[RANK], stride[RANK], count[RANK];
+hssize_t start[RANK];
+hid_t fid;                  /* HDF5 file ID */
+hid_t acc_tpl;    /* File access templates */
+hid_t sid;       /* Dataspace ID */
+hid_t file_dataspace;  /* File dataspace ID */
+hid_t mem_dataspace;  /* memory dataspace ID */
+hid_t dataset;    /* Dataset ID */
+hsize_t opt_alignment  = 1;
+hsize_t opt_threshold  = 1;
+int  opt_split_vfd  = 0;
+char  *meta_ext, *raw_ext;  /* holds the meta and raw file extension if */
+        /* opt_split_vfd is set */
+
+
+/* DEFAULT VALUES FOR OPTIONS */
+int64_t opt_block     = 1048576*16;
+int     opt_iter      = 1;
+int     opt_stripe    = -1;
+int     opt_correct   = 0;
+int     amode         = O_RDWR | O_CREAT;
+char    opt_file[256] = "perftest.out";
+char    opt_pvfstab[256] = "notset";
+int     opt_pvfstab_set = 0;
+
+const char *FILENAME[] = {
+   opt_file,
+   NULL
+};
+
+/* function prototypes */
+static int parse_args(int argc, char **argv);
+
+extern int errno;
+
+/* globals needed for getopt */
+extern char *optarg;
+
+int main(int argc, char **argv)
+{
+    char *buf, *tmp, *buf2, *tmp2, *check;
+    int i, j, mynod=0, nprocs=1, err, my_correct = 1, correct, myerrno;
+    double stim, etim;
+    double write_tim = 0;
+    double read_tim = 0;
+    double read_bw, write_bw;
+    double max_read_tim, max_write_tim;
+    double min_read_tim, min_write_tim;
+    double ave_read_tim, ave_write_tim;
+    int64_t iter_jump = 0;
+    int64_t seek_position = 0;
+    MPI_File fh;
+    MPI_Status status;
+    int nchars;
+    char filename[MAX_PATH];
+    herr_t ret;           /* Generic return value */
+
+    /* startup MPI and determine the rank of this process */
+    MPI_Init(&argc,&argv);
+    MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
+    MPI_Comm_rank(MPI_COMM_WORLD, &mynod);
+
+    /* parse the command line arguments */
+    parse_args(argc, argv);
+
+    if (mynod == 0) printf("# Using hdf5-io calls.\n");
+
+    /* kindof a weird hack- if the location of the pvfstab file was
+     * specified on the command line, then spit out this location into
+     * the appropriate environment variable: */
+
+#if H5_HAVE_SETENV
+/* no setenv or unsetenv */
+    if (opt_pvfstab_set) {
+            if((setenv("PVFSTAB_FILE", opt_pvfstab, 1)) < 0){
+                    perror("setenv");
+                    goto die_jar_jar_die;
+            }
+    }
+#endif
+
+    /* this is how much of the file data is covered on each iteration of
+     * the test.  used to help determine the seek offset on each
+     * iteration */
+    iter_jump = nprocs * opt_block;
+
+    /* setup a buffer of data to write */
+    if (!(tmp = (char *) malloc(opt_block + 256))) {
+            perror("malloc");
+            goto die_jar_jar_die;
+    }
+    buf = tmp + 128 - (((long)tmp) % 128);  /* align buffer */
+
+    if (opt_correct) {
+            /* do the same buffer setup for verifiable data */
+            if (!(tmp2 = (char *) malloc(opt_block + 256))) {
+                    perror("malloc2");
+                    goto die_jar_jar_die;
+             }
+            buf2 = tmp + 128 - (((long)tmp) % 128);
+    }
+
+    /* setup file access template with parallel IO access. */
+    if (opt_split_vfd){
+  	hid_t mpio_pl;
+
+  	mpio_pl = H5Pcreate (H5P_FILE_ACCESS);
+  	VRFY((acc_tpl >= 0), "", H5FATAL);
+  	ret = H5Pset_fapl_mpio(mpio_pl, MPI_COMM_WORLD, MPI_INFO_NULL);
+  	VRFY((ret >= 0), "", H5FATAL);
+
+  	/* set optional allocation alignment */
+  	if (opt_alignment*opt_threshold != 1){
+      	ret = H5Pset_alignment(acc_tpl, opt_threshold, opt_alignment );
+      	VRFY((ret >= 0), "H5Pset_alignment succeeded", !H5FATAL);
+  	}
+
+  	/* setup file access template */
+  	acc_tpl = H5Pcreate (H5P_FILE_ACCESS);
+  	VRFY((acc_tpl >= 0), "", H5FATAL);
+  	ret = H5Pset_fapl_split(acc_tpl, meta_ext, mpio_pl, raw_ext, mpio_pl);
+  	VRFY((ret >= 0), "H5Pset_fapl_split succeeded", H5FATAL);
+  	ret = H5Pclose(mpio_pl);
+  	VRFY((ret >= 0), "H5Pclose mpio_pl succeeded", H5FATAL);
+    }else{
+  	/* setup file access template */
+  	acc_tpl = H5Pcreate (H5P_FILE_ACCESS);
+  	VRFY((acc_tpl >= 0), "", H5FATAL);
+  	ret = H5Pset_fapl_mpio(acc_tpl, MPI_COMM_WORLD, MPI_INFO_NULL);
+  	VRFY((ret >= 0), "", H5FATAL);
+
+  	/* set optional allocation alignment */
+  	if (opt_alignment*opt_threshold != 1){
+  	    ret = H5Pset_alignment(acc_tpl, opt_threshold, opt_alignment );
+      	VRFY((ret >= 0), "H5Pset_alignment succeeded", !H5FATAL);
+  	}
+    }
+
+    h5_fixname_no_suffix(FILENAME[0], acc_tpl, filename, sizeof filename);
+
+    /* create the parallel file */
+    fid = H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, acc_tpl);
+    VRFY((fid >= 0), "H5Fcreate succeeded", H5FATAL);
+
+    /* define a contiquous dataset of opt_iter*nprocs*opt_block chars */
+    dims[0] = opt_iter * nprocs * opt_block;
+    sid = H5Screate_simple(RANK, dims, NULL);
+    VRFY((sid >= 0), "H5Screate_simple succeeded", H5FATAL);
+    dataset = H5Dcreate2(fid, "Dataset1", H5T_NATIVE_CHAR, sid,
+      		H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+    VRFY((dataset >= 0), "H5Dcreate2 succeeded", H5FATAL);
+
+    /* create the memory dataspace and the file dataspace */
+    dims[0] = opt_block;
+    mem_dataspace = H5Screate_simple(RANK, dims, NULL);
+    VRFY((mem_dataspace >= 0), "", H5FATAL);
+    file_dataspace = H5Dget_space(dataset);
+    VRFY((file_dataspace >= 0), "H5Dget_space succeeded", H5FATAL);
+
+    /* now each process writes a block of opt_block chars in round robbin
+     * fashion until the whole dataset is covered.
+     */
+    for(j=0; j < opt_iter; j++) {
+        /* setup a file dataspace selection */
+        start[0] = (j*iter_jump)+(mynod*opt_block);
+        stride[0] = block[0] = opt_block;
+        count[0]= 1;
+        ret=H5Sselect_hyperslab(file_dataspace, H5S_SELECT_SET, start, stride, count, block);
+        VRFY((ret >= 0), "H5Sset_hyperslab succeeded", H5FATAL);
+
+            if (opt_correct) /* fill in buffer for iteration */ {
+                    for (i=mynod+j, check=buf; i<opt_block; i++,check++) *check=(char)i;
+            }
+
+            /* discover the starting time of the operation */
+       MPI_Barrier(MPI_COMM_WORLD);
+       stim = MPI_Wtime();
+
+        /* write data */
+        ret = H5Dwrite(dataset, H5T_NATIVE_CHAR, mem_dataspace, file_dataspace,
+                H5P_DEFAULT, buf);
+        VRFY((ret >= 0), "H5Dwrite dataset1 succeeded", !H5FATAL);
+
+            /* discover the ending time of the operation */
+       etim = MPI_Wtime();
+
+       write_tim += (etim - stim);
+
+            /* we are done with this "write" iteration */
+    }
+
+    /* close dataset and file */
+    ret=H5Dclose(dataset);
+    VRFY((ret >= 0), "H5Dclose succeeded", H5FATAL);
+    ret=H5Fclose(fid);
+    VRFY((ret >= 0), "H5Fclose succeeded", H5FATAL);
+
+
+
+    /* wait for everyone to synchronize at this point */
+    MPI_Barrier(MPI_COMM_WORLD);
+
+    /* reopen the file for reading */
+    fid=H5Fopen(filename,H5F_ACC_RDONLY,acc_tpl);
+    VRFY((fid >= 0), "", H5FATAL);
+
+    /* open the dataset */
+    dataset = H5Dopen2(fid, "Dataset1", H5P_DEFAULT);
+    VRFY((dataset >= 0), "H5Dopen succeeded", H5FATAL);
+
+    /* we can re-use the same mem_dataspace and file_dataspace
+     * the H5Dwrite used since the dimension size is the same.
+     */
+
+    /* we are going to repeat the read the same pattern the write used */
+    for (j=0; j < opt_iter; j++) {
+        /* setup a file dataspace selection */
+        start[0] = (j*iter_jump)+(mynod*opt_block);
+        stride[0] = block[0] = opt_block;
+        count[0]= 1;
+        ret=H5Sselect_hyperslab(file_dataspace, H5S_SELECT_SET, start, stride, count, block);
+        VRFY((ret >= 0), "H5Sset_hyperslab succeeded", H5FATAL);
+            /* seek to the appropriate spot give the current iteration and
+             * rank within the MPI processes */
+
+            /* discover the start time */
+       MPI_Barrier(MPI_COMM_WORLD);
+       stim = MPI_Wtime();
+
+        /* read in the file data */
+        if (!opt_correct){
+            ret = H5Dread(dataset, H5T_NATIVE_CHAR, mem_dataspace, file_dataspace, H5P_DEFAULT, buf);
+        }
+        else{
+            ret = H5Dread(dataset, H5T_NATIVE_CHAR, mem_dataspace, file_dataspace, H5P_DEFAULT, buf2);
+        }
+        myerrno = errno;
+
+        /* discover the end time */
+       etim = MPI_Wtime();
+       read_tim += (etim - stim);
+        VRFY((ret >= 0), "H5Dwrite dataset1 succeeded", !H5FATAL);
+
+
+       if (ret < 0) fprintf(stderr, "node %d, read error, loc = %Ld: %s\n",
+                    mynod, mynod*opt_block, strerror(myerrno));
+
+        /* if the user wanted to check correctness, compare the write
+         * buffer to the read buffer */
+        if (opt_correct && memcmp(buf, buf2, opt_block)) {
+                fprintf(stderr, "node %d, correctness test failed\n", mynod);
+                my_correct = 0;
+                MPI_Allreduce(&my_correct, &correct, 1, MPI_INT, MPI_MIN,
+                        MPI_COMM_WORLD);
+        }
+
+        /* we are done with this read iteration */
+    }
+
+    /* close dataset and file */
+    ret=H5Dclose(dataset);
+    VRFY((ret >= 0), "H5Dclose succeeded", H5FATAL);
+    ret=H5Fclose(fid);
+    VRFY((ret >= 0), "H5Fclose succeeded", H5FATAL);
+    ret=H5Pclose(acc_tpl);
+    VRFY((ret >= 0), "H5Pclose succeeded", H5FATAL);
+
+    /* compute the read and write times */
+    MPI_Allreduce(&read_tim, &max_read_tim, 1, MPI_DOUBLE, MPI_MAX,
+            MPI_COMM_WORLD);
+    MPI_Allreduce(&read_tim, &min_read_tim, 1, MPI_DOUBLE, MPI_MIN,
+            MPI_COMM_WORLD);
+    MPI_Allreduce(&read_tim, &ave_read_tim, 1, MPI_DOUBLE, MPI_SUM,
+            MPI_COMM_WORLD);
+
+    /* calculate the average from the sum */
+    ave_read_tim = ave_read_tim / nprocs;
+
+    MPI_Allreduce(&write_tim, &max_write_tim, 1, MPI_DOUBLE, MPI_MAX,
+            MPI_COMM_WORLD);
+    MPI_Allreduce(&write_tim, &min_write_tim, 1, MPI_DOUBLE, MPI_MIN,
+            MPI_COMM_WORLD);
+    MPI_Allreduce(&write_tim, &ave_write_tim, 1, MPI_DOUBLE, MPI_SUM,
+            MPI_COMM_WORLD);
+
+    /* calculate the average from the sum */
+    ave_write_tim = ave_write_tim / nprocs;
+
+    /* print out the results on one node */
+    if (mynod == 0) {
+       read_bw = ((int64_t)(opt_block*nprocs*opt_iter))/(max_read_tim*1000000.0);
+       write_bw = ((int64_t)(opt_block*nprocs*opt_iter))/(max_write_tim*1000000.0);
+
+                    printf("nr_procs = %d, nr_iter = %d, blk_sz = %ld\n", nprocs,
+            opt_iter, (long)opt_block);
+
+                    printf("# total_size = %ld\n", (long)(opt_block*nprocs*opt_iter));
+
+                    printf("# Write:  min_time = %f, max_time = %f, mean_time = %f\n",
+                            min_write_tim, max_write_tim, ave_write_tim);
+                    printf("# Read:  min_time = %f, max_time = %f, mean_time = %f\n",
+                            min_read_tim, max_read_tim, ave_read_tim);
+
+       printf("Write bandwidth = %f Mbytes/sec\n", write_bw);
+       printf("Read bandwidth = %f Mbytes/sec\n", read_bw);
+
+            if (opt_correct) {
+                    printf("Correctness test %s.\n", correct ? "passed" : "failed");
+            }
+    }
+
+
+die_jar_jar_die:
+
+#if H5_HAVE_SETENV
+/* no setenv or unsetenv */
+    /* clear the environment variable if it was set earlier */
+    if  (opt_pvfstab_set){
+            unsetenv("PVFSTAB_FILE");
+    }
+#endif
+
+    free(tmp);
+    if (opt_correct) free(tmp2);
+    
+    MPI_Finalize();
+
+    return(0);
+}
+
+static int
+parse_args(int argc, char **argv)
+{
+    int c;
+
+    while ((c = getopt(argc, argv, "s:b:i:f:p:a:2:c")) != EOF) {
+        switch (c) {
+            case 's': /* stripe */
+                opt_stripe = atoi(optarg);
+                break;
+            case 'b': /* block size */
+                opt_block = atoi(optarg);
+                break;
+            case 'i': /* iterations */
+                opt_iter = atoi(optarg);
+                break;
+            case 'f': /* filename */
+                strncpy(opt_file, optarg, 255);
+                FILENAME[0] = opt_file;
+                break;
+            case 'p': /* pvfstab file */
+                strncpy(opt_pvfstab, optarg, 255);
+                opt_pvfstab_set = 1;
+                break;
+            case 'a': /* aligned allocation.
+                       * syntax: -a<alignment>/<threshold>
+                       * e.g., -a4096/512  allocate at 4096 bytes
+                       * boundary if request size >= 512.
+                       */
+                {char *p;
+                opt_alignment = atoi(optarg);
+                if (p=(char*)strchr(optarg, '/'))
+                    opt_threshold = atoi(p+1);
+                }
+                HDfprintf(stdout,
+                    "alignment/threshold=%Hu/%Hu\n",
+                     opt_alignment, opt_threshold);
+                break;
+            case '2': /* use 2-files, i.e., split file driver */
+                opt_split_vfd=1;
+                /* get meta and raw file extension. */
+                /* syntax is <raw_ext>,<meta_ext> */
+                meta_ext = raw_ext = optarg;
+                while (*raw_ext != '\0'){
+                    if (*raw_ext == ','){
+                        *raw_ext = '\0';
+                        raw_ext++;
+                        break;
+                    }
+                    raw_ext++;
+                }
+                printf("split-file-vfd used: %s,%s\n",
+                    meta_ext, raw_ext);
+                break;
+            case 'c': /* correctness */
+                opt_correct = 1;
+                break;
+            case '?': /* unknown */
+            default:
+                break;
+        }
+    }
+
+    return(0);
+}
+
+/*
+ * Local variables:
+ *  c-indent-level: 3
+ *  c-basic-offset: 3
+ *  tab-width: 3
+ * End:
+ */
+
+#else /* H5_HAVE_PARALLEL */
+/* dummy program since H5_HAVE_PARALLEL is not configured in */
+int
+main(int UNUSED argc, char UNUSED **argv)
+{
+    printf("No parallel performance because parallel is not configured in\n");
+    return(0);
+}
+#endif /* H5_HAVE_PARALLEL */
+
diff --git a/tools/perform/perf_meta.c b/tools/perform/perf_meta.c
new file mode 100644
index 0000000..b52871e
--- /dev/null
+++ b/tools/perform/perf_meta.c
@@ -0,0 +1,850 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Programmer:	Raymond Lu <slu@ncsa.uiuc.edu>
+ *		Friday, Oct 3, 2004
+ *
+ * Purpose:	Tests performance of metadata
+ */
+
+#include "h5test.h"
+
+#ifdef H5_HAVE_PARALLEL
+#define MAINPROCESS	(!mpi_rank)	/* define process 0 as main process */
+#endif /*H5_HAVE_PARALLEL*/
+
+/* File_Access_type bits */
+#define FACC_DEFAULT	0x0	/* serial as default */
+#define FACC_MPIO	0x1	/* MPIO */
+
+/* Which test to run */
+int RUN_TEST = 0x0;     /* all tests as default */
+int TEST_1   = 0x1;     /* Test 1 */
+int TEST_2   = 0x2;     /* Test 2 */
+int TEST_3   = 0x4;     /* Test 3 */
+
+
+const char *FILENAME[] = {
+    "meta_perf_1",
+    "meta_perf_2",
+    "meta_perf_3",
+    NULL
+};
+
+/* Default values for performance. Can be changed through command line options */
+int 	NUM_DSETS = 16;
+int 	NUM_ATTRS = 8;
+int 	BATCH_ATTRS = 2;
+hbool_t flush_dset = FALSE;
+hbool_t flush_attr = FALSE;
+int 	nerrors = 0;			/* errors count */
+hid_t	fapl;
+
+/* Data space IDs */
+hid_t	space;
+hid_t	small_space;
+
+/* Performance data */
+typedef struct p_time {
+    double total;
+    double avg;
+    double max;
+    double min;
+    double start;
+    char   func[32];
+} p_time;
+
+/*Test file access type for parallel.  MPIO as default */
+int facc_type = FACC_DEFAULT;
+
+double  retrieve_time(void);
+void    perf(p_time *perf_t, double start_t, double end_t);
+void    print_perf(p_time, p_time, p_time);
+
+
+/*-------------------------------------------------------------------------
+ * Function:	parse_options
+ *
+  Purpose:	Parse command line options
+ *
+ * Programmer:	Raymond Lu
+ *		Friday, Oct 3, 2003
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+parse_options(int argc, char **argv)
+{
+    int t;
+
+    /* Use default values */
+    if(argc==1)
+	return(0);
+
+    while (--argc){
+	if (**(++argv) != '-'){
+	    break;
+	}else{
+	    switch(*(*argv+1)){
+                case 'h':   /* Help page */
+                            return(1);
+
+		case 'd':   /* Number of datasets */
+                            NUM_DSETS = atoi((*argv+1)+1);
+			    if (NUM_DSETS < 0){
+				nerrors++;
+				return(1);
+			    }
+			    break;
+
+		case 'a':   /* Number of attributes per dataset */
+                            NUM_ATTRS = atoi((*argv+1)+1);
+			    if (NUM_ATTRS < 0){
+				nerrors++;
+				return(1);
+			    }
+			    break;
+
+		case 'n':   /* Number of attributes to be created in batch */
+                            BATCH_ATTRS = atoi((*argv+1)+1);
+			    if (BATCH_ATTRS < 0){
+				nerrors++;
+				return(1);
+			    }
+			    break;
+
+		case 'm':   /* Use the MPI-IO driver */
+			    facc_type = FACC_MPIO;
+			    break;
+
+                case 'f':   /* Call H5Fflush for each dataset or attribute */
+                            if(!strcmp("a", (*argv+2)))
+                                flush_attr = TRUE;
+                            else if(!strcmp("d", (*argv+2)))
+                                flush_dset = TRUE;
+                            else {
+                                nerrors++;
+                                return(1);
+                            }
+                            break;
+
+		case 't':   /* Which test to run */
+                            t = atoi((*argv+1)+1);
+			    if (t < 1 || t > 3){
+				nerrors++;
+				return(1);
+			    }
+                            if(t == 1)
+                                RUN_TEST |= TEST_1;
+                            else if(t == 2)
+                                RUN_TEST |= TEST_2;
+                            else
+                                RUN_TEST |= TEST_3;
+
+			    break;
+
+ 		default:    nerrors++;
+			    return(1);
+	    }
+	}
+    } /*while*/
+
+    /* Check valid values */
+#ifndef H5_HAVE_PARALLEL
+    if(facc_type == FACC_MPIO)
+    {
+        nerrors++;
+        return(1);
+    }
+#endif /*H5_HAVE_PARALLEL*/
+
+    if(NUM_ATTRS && !BATCH_ATTRS)
+        NUM_ATTRS = 0;
+
+    if(!NUM_ATTRS && BATCH_ATTRS)
+        BATCH_ATTRS = 0;
+
+    if(!NUM_DSETS) {
+        nerrors++;
+        return(1);
+    }
+
+    if(NUM_ATTRS && BATCH_ATTRS) {
+        if(BATCH_ATTRS > NUM_ATTRS || NUM_ATTRS % BATCH_ATTRS) {
+	    nerrors++;
+            return(1);
+        }
+    }
+
+    return(0);
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	usage
+ *
+  Purpose:	Prints help page
+ *
+ * Programmer:	Raymond Lu
+ *		Friday, Oct 3, 2003
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static void
+usage(void)
+{
+    printf("Usage: perf_meta [-h] [-m] [-d<num_datasets>]"
+           "[-a<num_attributes>]\n"
+           "\t[-n<batch_attributes>] [-f<option>] [-t<test>]\n");
+    printf("\t-h"
+	"\t\t\thelp page.\n");
+    printf("\t-m"
+	"\t\t\tset MPIO as the file driver when parallel HDF5\n"
+        "\t\t\t\tis enabled.  -m must be specified\n"
+        "\t\t\t\twhen running parallel program.\n");
+    printf("\t-d<num_datasets>"
+	"\tset number of datasets for meta data \n"
+        "\t\t\t\tperformance test\n");
+    printf("\t-a<num_attributes>"
+        "\tset number of attributes per dataset for meta \n"
+        "\t\t\t\tdata performance test.\n");
+    printf("\t-n<batch_attributes>"
+	"\tset batch number of attributes for dataset \n"
+        "\t\t\t\tfor meta data performance test.\n");
+    printf("\t-f<option>"
+	"\t\tflush data to disk after closing a dataset \n"
+        "\t\t\t\tor attribute.  Valid options are \"d\" for \n"
+        "\t\t\t\tdataset, \"a\" for attribute.  Disabled is \n"
+        "\t\t\t\tthe default.\n");
+    printf("\t-t<tests>"
+	"\t\trun specific test.  Give only one number each \n"
+        "\t\t\t\ttime. i.e. \"-t1 -t3\" will run test 1 and 3. \n"
+        "\t\t\t\tDefault is all three tests.  The 3 tests are: \n\n"
+        "\t\t\t\t1. Create <num_attributes> attributes for each \n"
+        "\t\t\t\t   of <num_datasets> existing datasets.\n"
+        "\t\t\t\t2. Create <num_attributes> attributes for each \n"
+        "\t\t\t\t   of <num_datasets> new datasets.\n"
+        "\t\t\t\t3. Create <batch_attributes> attributes for \n"
+        "\t\t\t\t   each of <num_dataset> new datasets for \n"
+        "\t\t\t\t   <num_attributes>/<batch_attributes> times.\n");
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	create_dspace
+ *
+ * Purpose:	Attempts to create data space.
+ *
+ * Return:	Success:	0
+ *
+ *		Failure:	-1
+ *
+ * Programmer:	Raymond Lu
+ *		Friday, Oct 3, 2003
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+create_dspace(void)
+{
+    hsize_t	dims[2];
+    hsize_t	small_dims[2];
+
+    /* Create the data space */
+    dims[0] = 256;
+    dims[1] = 512;
+    if((space = H5Screate_simple(2, dims, NULL)) < 0)
+	    goto error;
+
+    /* Create a small data space for attributes */
+    small_dims[0] = 16;
+    small_dims[1] = 8;
+    if((small_space = H5Screate_simple(2, small_dims, NULL)) < 0)
+	    goto error;
+
+    return 0;
+
+error:
+    return -1;
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	create_dsets
+ *
+ * Purpose:	Attempts to create some datasets.
+ *
+ * Return:	Success:	0
+ *
+ *		Failure:	-1
+ *
+ * Programmer:	Raymond Lu
+ *		Friday, Oct 3, 2003
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+create_dsets(hid_t file)
+{
+    hid_t	dataset;
+    char	dset_name[32];
+    int		i;
+
+    /*
+     * Create a dataset using the default dataset creation properties.
+     */
+    for(i = 0; i < NUM_DSETS; i++) {
+	sprintf(dset_name, "dataset %d", i);
+    	if((dataset = H5Dcreate2(file, dset_name, H5T_NATIVE_DOUBLE, space,
+                H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0)
+            goto error;
+
+    	if(H5Dclose(dataset) < 0)
+            goto error;
+    } /* end for */
+
+    return 0;
+
+error:
+    return -1;
+
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	create_attrs_1
+ *
+ * Purpose:	Attempts to create all attributes for each existing dataset.
+ *
+ * Return:	Success:	0
+ *
+ *		Failure:	-1
+ *
+ * Programmer:	Raymond Lu
+ *		Friday, Oct 3, 2003
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+create_attrs_1(void)
+{
+    hid_t	file, dataset, attr;
+    char	filename[128];
+    char	dset_name[64];
+    char	attr_name[128];
+    int		i, j;
+    p_time      attr_t  = {0, 0, 0, 1000000, 0, ""};
+    p_time      open_t  = {0, 0, 0, 1000000, 0, "H5Dopen2"};
+    p_time      close_t = {0, 0, 0, 1000000, 0, ""};
+
+#ifdef H5_HAVE_PARALLEL
+    /* need the rank for printing data */
+    int         mpi_rank;
+    if(facc_type == FACC_MPIO)
+        MPI_Comm_rank(MPI_COMM_WORLD, &mpi_rank);
+#endif /*H5_HAVE_PARALLEL*/
+
+    h5_fixname(FILENAME[0], fapl, filename, sizeof filename);
+
+    if ((file=H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT,
+	fapl)) < 0)
+	goto error;
+
+    if(create_dsets(file) < 0)
+	goto error;
+
+    /*
+     * Create all(user specifies the number) attributes for each dataset
+     */
+    for(i = 0; i < NUM_DSETS; i++) {
+	sprintf(dset_name, "dataset %d", i);
+        open_t.start = retrieve_time();
+	if((dataset = H5Dopen2(file, dset_name, H5P_DEFAULT)) < 0)
+		goto error;
+	perf(&open_t, open_t.start, retrieve_time());
+
+	for(j = 0; j < NUM_ATTRS; j++) {
+            sprintf(attr_name, "all attrs for each dset %d", j);
+            attr_t.start = retrieve_time();
+            if((attr = H5Acreate2(dataset, attr_name, H5T_NATIVE_DOUBLE,
+                    small_space, H5P_DEFAULT, H5P_DEFAULT)) < 0)
+                goto error;
+            if(H5Aclose(attr) < 0)
+                goto error;
+            perf(&attr_t, attr_t.start, retrieve_time());
+            if(flush_attr && H5Fflush(file, H5F_SCOPE_LOCAL) < 0)
+                goto error;
+    	} /* end for */
+
+	close_t.start = retrieve_time();
+    	if(H5Dclose(dataset) < 0)
+            goto error;
+	perf(&close_t, close_t.start, retrieve_time());
+        if(flush_dset && H5Fflush(file,  H5F_SCOPE_LOCAL) < 0)
+            goto error;
+    } /* end for */
+
+    if(facc_type == FACC_MPIO) {
+#ifdef H5_HAVE_PARALLEL
+        MPI_Barrier(MPI_COMM_WORLD);
+#endif /*H5_HAVE_PARALLEL*/
+    }
+
+#ifdef H5_HAVE_PARALLEL
+    if (facc_type == FACC_DEFAULT || (facc_type != FACC_DEFAULT && MAINPROCESS)) /* only process 0 reports */
+#endif /*H5_HAVE_PARALLEL*/
+    {
+        /* Calculate the average time */
+        open_t.avg  = open_t.total / NUM_DSETS;
+        close_t.avg = close_t.total / NUM_DSETS;
+        if(NUM_ATTRS)
+            attr_t.avg  = attr_t.total / (NUM_ATTRS*NUM_DSETS);
+
+        /* Print out the performance result */
+        fprintf(stderr, "1.  Create %d attributes for each of %d existing datasets\n",
+            NUM_ATTRS, NUM_DSETS);
+        print_perf(open_t, close_t, attr_t);
+    }
+
+    if (H5Fclose(file) < 0) goto error;
+
+    return 0;
+
+error:
+    return -1;
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	create_attrs_2
+ *
+ * Purpose:	Attempts to create all attributes for each new dataset.
+ *
+ * Return:	Success:	0
+ *
+ *		Failure:	-1
+ *
+ * Programmer:	Raymond Lu
+ *		Friday, Oct 3, 2003
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+create_attrs_2(void)
+{
+    hid_t	file, dataset, attr;
+    char	filename[128];
+    char	dset_name[64];
+    char	attr_name[128];
+    int		i, j;
+    p_time      attr_t  = {0, 0, 0, 1000000, 0, ""};
+    p_time      create_t  = {0, 0, 0, 1000000, 0, "H5Dcreate2"};
+    p_time      close_t = {0, 0, 0, 1000000, 0, ""};
+
+#ifdef H5_HAVE_PARALLEL
+    /* need the rank for printing data */
+    int         mpi_rank;
+    if(facc_type == FACC_MPIO)
+        MPI_Comm_rank(MPI_COMM_WORLD, &mpi_rank);
+#endif /*H5_HAVE_PARALLEL*/
+
+    h5_fixname(FILENAME[1], fapl, filename, sizeof filename);
+
+    if ((file=H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, fapl)) < 0)
+	goto error;
+
+    /*
+     * Create all(user specifies the number) attributes for each new dataset
+     */
+    for(i = 0; i < NUM_DSETS; i++) {
+	sprintf(dset_name, "dataset %d", i);
+        create_t.start = retrieve_time();
+   	if((dataset = H5Dcreate2(file, dset_name, H5T_NATIVE_DOUBLE,
+                space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0)
+            goto error;
+	perf(&create_t, create_t.start, retrieve_time());
+
+	for(j = 0; j < NUM_ATTRS; j++) {
+            sprintf(attr_name, "all attrs for each dset %d", j);
+            attr_t.start = retrieve_time();
+            if((attr = H5Acreate2(dataset, attr_name, H5T_NATIVE_DOUBLE,
+                    small_space, H5P_DEFAULT, H5P_DEFAULT)) < 0)
+                goto error;
+            if(H5Aclose(attr) < 0)
+                goto error;
+            perf(&attr_t, attr_t.start, retrieve_time());
+            if(flush_attr && H5Fflush(file,  H5F_SCOPE_LOCAL) < 0)
+                goto error;
+	} /* end for */
+
+	close_t.start = retrieve_time();
+    	if(H5Dclose(dataset) < 0)
+            goto error;
+	perf(&close_t, close_t.start, retrieve_time());
+        if(flush_dset && H5Fflush(file,  H5F_SCOPE_LOCAL) < 0)
+            goto error;
+    } /* end for */
+
+#ifdef H5_HAVE_PARALLEL
+    if(facc_type == FACC_MPIO)
+        MPI_Barrier(MPI_COMM_WORLD);
+#endif /*H5_HAVE_PARALLEL*/
+
+#ifdef H5_HAVE_PARALLEL
+    /* only process 0 reports if parallel */
+    if (facc_type == FACC_DEFAULT || (facc_type != FACC_DEFAULT && MAINPROCESS))
+#endif /*H5_HAVE_PARALLEL*/
+    {
+        /* Calculate the average time */
+        create_t.avg = create_t.total / NUM_DSETS;
+        close_t.avg  = close_t.total / NUM_DSETS;
+        if(NUM_ATTRS)
+            attr_t.avg = attr_t.total / (NUM_ATTRS*NUM_DSETS);
+
+        /* Print out the performance result */
+        fprintf(stderr, "2.  Create %d attributes for each of %d new datasets\n",
+            NUM_ATTRS, NUM_DSETS);
+        print_perf(create_t, close_t, attr_t);
+    }
+
+    if (H5Fclose(file) < 0) goto error;
+
+    return 0;
+
+error:
+    return -1;
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	create_attrs_3
+ *
+ * Purpose:	Attempts to create some attributes for each dataset in a
+ * 		loop.
+ *
+ * Return:	Success:	0
+ *
+ *		Failure:	-1
+ *
+ * Programmer:	Raymond Lu
+ *		Friday, Oct 3, 2003
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+create_attrs_3(void)
+{
+    hid_t	file, dataset, attr;
+    char	filename[128];
+    char	dset_name[64];
+    char	attr_name[128];
+    int		loop_num;
+    int		i, j, k;
+    p_time      attr_t  = {0, 0, 0, 1000000, 0, ""};
+    p_time      open_t  = {0, 0, 0, 1000000, 0, "H5Dopen2"};
+    p_time      close_t = {0, 0, 0, 1000000, 0, ""};
+
+#ifdef H5_HAVE_PARALLEL
+    /* need the rank for printing data */
+    int         mpi_rank;
+    if(facc_type == FACC_MPIO)
+        MPI_Comm_rank(MPI_COMM_WORLD, &mpi_rank);
+#endif /*H5_HAVE_PARALLEL*/
+
+    h5_fixname(FILENAME[2], fapl, filename, sizeof filename);
+
+    if ((file=H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT,
+	fapl)) < 0)
+	goto error;
+
+    if(create_dsets(file) < 0)
+	goto error;
+
+    /*
+     * Create some(user specifies the number) attributes for each dataset
+     * in a loop
+     */
+    loop_num = NUM_ATTRS/BATCH_ATTRS;
+
+    for(i = 0; i < loop_num; i++) {
+    	for(j = 0; j < NUM_DSETS; j++) {
+            sprintf(dset_name, "dataset %d", j);
+            open_t.start = retrieve_time();
+            if((dataset = H5Dopen2(file, dset_name, H5P_DEFAULT)) < 0)
+                goto error;
+            perf(&open_t, open_t.start, retrieve_time());
+
+            for(k = 0; k < BATCH_ATTRS; k++) {
+                sprintf(attr_name, "some attrs for each dset %d %d", i, k);
+                attr_t.start = retrieve_time();
+                if((attr = H5Acreate2(dataset, attr_name, H5T_NATIVE_DOUBLE,
+                        small_space, H5P_DEFAULT, H5P_DEFAULT)) < 0)
+                    goto error;
+                if(H5Aclose(attr) < 0)
+                    goto error;
+                perf(&attr_t, attr_t.start, retrieve_time());
+                if(flush_attr && H5Fflush(file,  H5F_SCOPE_LOCAL) < 0)
+                    goto error;
+            } /* end for */
+
+            close_t.start = retrieve_time();
+            if(H5Dclose(dataset) < 0)
+                goto error;
+            perf(&close_t, close_t.start, retrieve_time());
+            if(flush_dset && H5Fflush(file,  H5F_SCOPE_LOCAL) < 0)
+                goto error;
+    	} /* end for */
+    } /* end for */
+
+#ifdef H5_HAVE_PARALLEL
+    if(facc_type == FACC_MPIO)
+        MPI_Barrier(MPI_COMM_WORLD);
+#endif /*H5_HAVE_PARALLEL*/
+
+#ifdef H5_HAVE_PARALLEL
+    /* only process 0 reports if parallel */
+    if (facc_type == FACC_DEFAULT || (facc_type != FACC_DEFAULT && MAINPROCESS))
+#endif /*H5_HAVE_PARALLEL*/
+    {
+        /* Calculate the average time */
+        open_t.avg = open_t.total / (loop_num*NUM_DSETS);
+        close_t.avg = close_t.total / (loop_num*NUM_DSETS);
+        attr_t.avg = attr_t.total / (NUM_ATTRS*NUM_DSETS);
+
+        /* Print out the performance result */
+        fprintf(stderr, "3.  Create %d attributes for each of %d existing datasets for %d times\n",
+            BATCH_ATTRS, NUM_DSETS, loop_num);
+        print_perf(open_t, close_t, attr_t);
+    }
+
+    if (H5Fclose(file) < 0) goto error;
+
+    return 0;
+
+error:
+    return -1;
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	retrieve_time
+ *
+ * Purpose:     Returns time in seconds, in a double number.
+ *
+ * Programmer:	Raymond Lu
+ *		Friday, Oct 3, 2003
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+double retrieve_time(void)
+{
+#ifdef H5_HAVE_PARALLEL
+    if(facc_type == FACC_DEFAULT) {
+#endif /*H5_HAVE_PARALLEL*/
+        struct timeval t;
+        HDgettimeofday(&t, NULL);
+        return ((double)t.tv_sec + (double)t.tv_usec / 1000000);
+#ifdef H5_HAVE_PARALLEL
+    } else {
+        return MPI_Wtime();
+    }
+#endif /*H5_HAVE_PARALLEL*/
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	perf
+ *
+ * Purpose:	Calculate total time, maximal and minimal time of
+ *              performance.
+ *
+ * Programmer:	Raymond Lu
+ *		Friday, Oct 3, 2003
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+void perf(p_time *perf_t, double start_t, double end_t)
+{
+	double t = end_t - start_t;
+
+#ifdef H5_HAVE_PARALLEL
+    if(facc_type == FACC_MPIO) {
+        double reduced_t;
+        double t_max, t_min;
+        int    mpi_size, mpi_rank;
+
+        MPI_Comm_size(MPI_COMM_WORLD, &mpi_size);
+        MPI_Comm_rank(MPI_COMM_WORLD, &mpi_rank);
+        MPI_Barrier(MPI_COMM_WORLD);
+
+        MPI_Reduce(&t, &reduced_t, 1, MPI_DOUBLE, MPI_SUM, 0,
+                MPI_COMM_WORLD);
+        reduced_t /= mpi_size;
+
+        MPI_Reduce(&t, &t_max, 1, MPI_DOUBLE, MPI_MAX, 0,
+                MPI_COMM_WORLD);
+        MPI_Reduce(&t, &t_min, 1, MPI_DOUBLE, MPI_MIN, 0,
+                MPI_COMM_WORLD);
+
+        if (MAINPROCESS) {
+            perf_t->total += reduced_t;
+
+	    if(t_max > perf_t->max)
+		perf_t->max = t_max;
+	    if(t_min < perf_t->min)
+		perf_t->min = t_min;
+        }
+    } else
+#endif /*H5_HAVE_PARALLEL*/
+    {
+	perf_t->total += t;
+
+	if(t > perf_t->max)
+		perf_t->max = t;
+	if(t < perf_t->min)
+		perf_t->min = t;
+    }
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	print_perf
+ *
+ * Purpose:	Print out performance data.
+ *
+ * Programmer:	Raymond Lu
+ *		Friday, Oct 3, 2003
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+void print_perf(p_time open_t, p_time close_t, p_time attr_t)
+{
+    fprintf(stderr, "\t%s:\t\tavg=%.6fs;\tmax=%.6fs;\tmin=%.6fs\n",
+		open_t.func, open_t.avg, open_t.max, open_t.min);
+    fprintf(stderr, "\tH5Dclose:\t\tavg=%.6fs;\tmax=%.6fs;\tmin=%.6fs\n",
+		close_t.avg, close_t.max, close_t.min);
+    if(NUM_ATTRS)
+        fprintf(stderr, "\tH5A(create & close):\tavg=%.6fs;\tmax=%.6fs;\tmin=%.6fs\n",
+		attr_t.avg, attr_t.max, attr_t.min);
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	main
+ *
+ * Purpose:	Tests
+ *
+ * Return:	Success:	exit(0)
+ *
+ *		Failure:	exit(1)
+ *
+ * Programmer:	Raymond Lu
+ *		Friday, Oct 3, 2003
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+main(int argc, char **argv)
+{
+#ifdef H5_HAVE_PARALLEL
+    int mpi_size, mpi_rank;				/* mpi variables */
+#endif /*H5_HAVE_PARALLEL*/
+
+    if(parse_options(argc, argv) != 0) {
+       usage();
+       return 0;
+    }
+
+#ifdef H5_HAVE_PARALLEL
+    if(facc_type == FACC_MPIO) {
+        MPI_Init(&argc, &argv);
+        MPI_Comm_size(MPI_COMM_WORLD, &mpi_size);
+        MPI_Comm_rank(MPI_COMM_WORLD, &mpi_rank);
+    }
+#endif /*H5_HAVE_PARALLEL*/
+
+#ifdef H5_HAVE_PARALLEL
+    if (facc_type == FACC_DEFAULT || (facc_type != FACC_DEFAULT && MAINPROCESS))
+#endif /*H5_HAVE_PARALLEL*/
+        fprintf(stderr, "\t\tPerformance result of metadata for datasets and attributes\n\n");
+
+    fapl = H5Pcreate (H5P_FILE_ACCESS);
+#ifdef H5_HAVE_PARALLEL
+    if(facc_type == FACC_MPIO)
+        H5Pset_fapl_mpio(fapl, MPI_COMM_WORLD, MPI_INFO_NULL);
+#endif /*H5_HAVE_PARALLEL*/
+
+    nerrors += create_dspace() < 0 	?1:0;
+
+    if((RUN_TEST & TEST_1) || !RUN_TEST)
+        nerrors += create_attrs_1() < 0 	?1:0;
+    if((RUN_TEST & TEST_2) || !RUN_TEST)
+        nerrors += create_attrs_2() < 0 	?1:0;
+    if(((RUN_TEST & TEST_3) || !RUN_TEST) && BATCH_ATTRS && NUM_ATTRS)
+        nerrors += create_attrs_3() < 0 	?1:0;
+
+    if (H5Sclose(space) < 0) goto error;
+    if (H5Sclose(small_space) < 0) goto error;
+
+    h5_cleanup(FILENAME, fapl);
+
+#ifdef H5_HAVE_PARALLEL
+    if(facc_type == FACC_MPIO)
+        /* MPI_Finalize must be called AFTER H5close which may use MPI calls */
+        MPI_Finalize();
+#endif /*H5_HAVE_PARALLEL*/
+
+    if (nerrors) goto error;
+#ifdef H5_HAVE_PARALLEL
+    if (facc_type != FACC_DEFAULT && MAINPROCESS)
+#endif /*H5_HAVE_PARALLEL*/
+        printf("All metadata performance tests passed.\n");
+
+    return 0;
+
+ error:
+    nerrors = MAX(1, nerrors);
+#ifdef H5_HAVE_PARALLEL
+    if (facc_type != FACC_DEFAULT && MAINPROCESS)
+#endif /*H5_HAVE_PARALLEL*/
+        printf("***** %d PERFORMANCE TEST%s FAILED! *****\n",
+	   nerrors, 1 == nerrors ? "" : "S");
+
+    return 1;
+}
+
diff --git a/tools/perform/pio_engine.c b/tools/perform/pio_engine.c
new file mode 100644
index 0000000..3535fb4
--- /dev/null
+++ b/tools/perform/pio_engine.c
@@ -0,0 +1,2678 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Author: Albert Cheng of NCSA, Oct 24, 2001.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#ifdef H5_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <errno.h>
+
+#include "hdf5.h"
+
+#ifdef H5_HAVE_PARALLEL
+
+#include <mpi.h>
+
+#ifndef MPI_FILE_NULL           /*MPIO may be defined in mpi.h already       */
+#   include <mpio.h>
+#endif  /* !MPI_FILE_NULL */
+
+#include "pio_perf.h"
+#include "pio_timer.h"
+
+/* Macro definitions */
+
+#if H5_VERS_MAJOR == 1 && H5_VERS_MINOR == 6
+#    define H5DCREATE(fd, name, type, space, dcpl)    H5Dcreate(fd, name, type, space, dcpl)
+#    define H5DOPEN(fd, name)                         H5Dopen(fd, name)
+#else
+#    define H5DCREATE(fd, name, type, space, dcpl)    H5Dcreate2(fd, name, type, space, H5P_DEFAULT, dcpl, H5P_DEFAULT)
+#    define H5DOPEN(fd, name)                         H5Dopen2(fd, name, H5P_DEFAULT)
+#endif
+
+/* sizes of various items. these sizes won't change during program execution */
+/* The following three must have the same type */
+#define ELMT_SIZE           (sizeof(unsigned char))     /* we're doing bytes */
+#define ELMT_MPI_TYPE       MPI_BYTE
+#define ELMT_H5_TYPE        H5T_NATIVE_UCHAR
+
+#define GOTOERROR(errcode)  { ret_code = errcode; goto done; }
+#define GOTODONE        { goto done; }
+#define ERRMSG(mesg) {                                                  \
+    fprintf(stderr, "Proc %d: ", pio_mpi_rank_g);                       \
+    fprintf(stderr, "*** Assertion failed (%s) at line %4d in %s\n",    \
+        mesg, (int)__LINE__, __FILE__);                             \
+}
+
+#define MSG(mesg) {                                     \
+    fprintf(stderr, "Proc %d: ", pio_mpi_rank_g);       \
+    fprintf(stderr, "(%s) at line %4d in %s\n",         \
+        mesg, (int)__LINE__, __FILE__);             \
+}
+
+/* verify: if val is false (0), print mesg. */
+#define VRFY(val, mesg) do {                            \
+    if (!val) {                                         \
+    ERRMSG(mesg);                                   \
+    GOTOERROR(FAIL);                                \
+    }                                                   \
+} while(0)
+
+
+/* POSIX I/O macros */
+#define POSIXCREATE(fn)           HDopen(fn, O_CREAT|O_TRUNC|O_RDWR, 0600)
+#define POSIXOPEN(fn, F)          HDopen(fn, F, 0600)
+#define POSIXCLOSE(F)             HDclose(F)
+#define POSIXSEEK(F,L)            HDlseek(F, L, SEEK_SET)
+#define POSIXWRITE(F,B,S)         HDwrite(F,B,S)
+#define POSIXREAD(F,B,S)          HDread(F,B,S)
+
+enum {
+    PIO_CREATE = 1,
+    PIO_WRITE = 2,
+    PIO_READ = 4
+};
+
+/* Global variables */
+static int  clean_file_g = -1;  /*whether to cleanup temporary test     */
+/*files. -1 is not defined;             */
+/*0 is no cleanup; 1 is do cleanup      */
+
+/*
+ * In a parallel machine, the filesystem suitable for compiling is
+ * unlikely a parallel file system that is suitable for parallel I/O.
+ * There is no standard pathname for the parallel file system.  /tmp
+ * is about the best guess.
+ */
+#ifndef HDF5_PARAPREFIX
+#    define HDF5_PARAPREFIX     ""
+#endif  /* !HDF5_PARAPREFIX */
+
+#ifndef MIN
+#   define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif  /* !MIN */
+
+/* the different types of file descriptors we can expect */
+typedef union _file_descr {
+    int         posixfd;    /* POSIX file handle*/
+    MPI_File    mpifd;      /* MPI file         */
+    hid_t       h5fd;       /* HDF5 file        */
+} file_descr;
+
+/* local functions */
+static char  *pio_create_filename(iotype iot, const char *base_name,
+    char *fullname, size_t size);
+static herr_t do_write(results *res, file_descr *fd, parameters *parms,
+    long ndsets, off_t nelmts, size_t buf_size, void *buffer);
+static herr_t do_read(results *res, file_descr *fd, parameters *parms,
+    long ndsets, off_t nelmts, size_t buf_size, void *buffer /*out*/);
+static herr_t do_fopen(parameters *param, char *fname, file_descr *fd /*out*/,
+    int flags);
+static herr_t do_fclose(iotype iot, file_descr *fd);
+static void do_cleanupfile(iotype iot, char *fname);
+
+/*
+ * Function:        do_pio
+ * Purpose:         PIO Engine where Parallel IO are executed.
+ * Return:          results
+ * Programmer:      Albert Cheng, Bill Wendling 2001/12/12
+ * Modifications:
+ *  Added 2D testing (Christian Chilan, 10. August 2005)
+ */
+    results
+do_pio(parameters param)
+{
+    /* return codes */
+    herr_t      ret_code = 0;   /*return code                           */
+    results     res;
+
+    file_descr  fd;
+    iotype      iot;
+
+    char        fname[FILENAME_MAX];
+    long    nf;
+    long        ndsets;
+    off_t       nbytes;         /*number of bytes per dataset  */
+    off_t   snbytes;    /*general dataset size          */
+                                /*for 1D, it is the actual dataset size */
+                                /*for 2D, it is the size of a side of the dataset square */
+    char        *buffer = NULL; /*data buffer pointer           */
+    size_t      buf_size;       /*general buffer size in bytes     */
+                                /*for 1D, it is the actual buffer size */
+                                /*for 2D, it is the length of the buffer rectangle */
+    size_t      blk_size;       /*data block size in bytes      */
+    size_t  bsize;      /*actual buffer size            */
+
+    /* HDF5 variables */
+    herr_t          hrc;        /*HDF5 return code              */
+
+    /* Sanity check parameters */
+
+    /* IO type */
+    iot = param.io_type;
+
+    switch (iot) {
+        case MPIO:
+            fd.mpifd = MPI_FILE_NULL;
+            res.timers = pio_time_new(MPI_TIMER);
+            break;
+        case POSIXIO:
+            fd.posixfd = -1;
+            res.timers = pio_time_new(MPI_TIMER);
+            break;
+        case PHDF5:
+            fd.h5fd = -1;
+            res.timers = pio_time_new(MPI_TIMER);
+            break;
+        default:
+            /* unknown request */
+            fprintf(stderr, "Unknown IO type request (%d)\n", iot);
+            GOTOERROR(FAIL);
+    }
+
+    ndsets = param.num_dsets;       /* number of datasets per file          */
+    nbytes = param.num_bytes;       /* number of bytes per dataset          */
+    buf_size = param.buf_size;
+    blk_size = param.blk_size;
+
+    if (!param.dim2d){
+        snbytes = nbytes;   /* General dataset size     */
+        bsize = buf_size;   /* Actual buffer size       */
+    }
+    else {
+        snbytes = (off_t)sqrt(nbytes);  /* General dataset size     */
+        bsize = buf_size * blk_size;    /* Actual buffer size       */
+    }
+
+    if (param.num_files < 0 ) {
+    fprintf(stderr,
+        "number of files must be >= 0 (%ld)\n",
+        param.num_files);
+    GOTOERROR(FAIL);
+    }
+
+    if (ndsets < 0 ) {
+    fprintf(stderr,
+        "number of datasets per file must be >= 0 (%ld)\n",
+        ndsets);
+    GOTOERROR(FAIL);
+    }
+
+    if (param.num_procs <= 0 ) {
+    fprintf(stderr,
+        "maximum number of process to use must be > 0 (%d)\n",
+        param.num_procs);
+    GOTOERROR(FAIL);
+    }
+
+    /* Validate transfer buffer size & block size*/
+    if(blk_size<=0) {
+    HDfprintf(stderr,
+        "Transfer block size (%zu) must be > 0\n", blk_size);
+    GOTOERROR(FAIL);
+    }
+    if(buf_size<=0) {
+    HDfprintf(stderr,
+        "Transfer buffer size (%zu) must be > 0\n", buf_size);
+    GOTOERROR(FAIL);
+    }
+    if ((buf_size % blk_size) != 0){
+    HDfprintf(stderr,
+        "Transfer buffer size (%zu) must be a multiple of the "
+        "interleaved I/O block size (%zu)\n",
+        buf_size, blk_size);
+    GOTOERROR(FAIL);
+    }
+    if((snbytes%pio_mpi_nprocs_g)!=0) {
+    HDfprintf(stderr,
+              "Dataset size (%" H5_PRINTF_LL_WIDTH "d) must be a multiple of the "
+              "number of processes (%d)\n",
+              (long long)snbytes, pio_mpi_nprocs_g);
+    GOTOERROR(FAIL);
+    }
+
+    if (!param.dim2d){
+        if(((snbytes/pio_mpi_nprocs_g)%buf_size)!=0) {
+        HDfprintf(stderr,
+            "Dataset size/process (%" H5_PRINTF_LL_WIDTH "d) must be a multiple of the "
+            "trasfer buffer size (%zu)\n",
+            (long long)(snbytes/pio_mpi_nprocs_g), buf_size);
+        GOTOERROR(FAIL);
+        }
+    }
+    else {
+        if((snbytes%buf_size)!=0) {
+        HDfprintf(stderr,
+            "Dataset side size (%" H5_PRINTF_LL_WIDTH "d) must be a multiple of the "
+            "trasfer buffer size (%zu)\n",
+            (long long)snbytes, buf_size);
+        GOTOERROR(FAIL);
+        }
+    }
+
+    /* Allocate transfer buffer */
+    if ((buffer = malloc(bsize)) == NULL){
+    HDfprintf(stderr, "malloc for transfer buffer size (%zu) failed\n",
+        bsize);
+    GOTOERROR(FAIL);
+    }
+
+    if (pio_debug_level >= 4) {
+    int myrank;
+
+    MPI_Comm_rank(pio_comm_g, &myrank);
+
+    /* output all of the times for all iterations */
+    if (myrank == 0)
+        fprintf(output, "Timer details:\n");
+    }
+
+    for (nf = 1; nf <= param.num_files; nf++) {
+    /*
+     * Write performance measurement
+     */
+    /* Open file for write */
+    char base_name[256];
+
+    sprintf(base_name, "#pio_tmp_%lu", nf);
+    pio_create_filename(iot, base_name, fname, sizeof(fname));
+    if (pio_debug_level > 0)
+        HDfprintf(output, "rank %d: data filename=%s\n",
+            pio_mpi_rank_g, fname);
+
+    /* Need barrier to make sure everyone starts at the same time */
+    MPI_Barrier(pio_comm_g);
+
+    set_time(res.timers, HDF5_GROSS_WRITE_FIXED_DIMS, TSTART);
+    hrc = do_fopen(&param, fname, &fd, PIO_CREATE | PIO_WRITE);
+
+    VRFY((hrc == SUCCESS), "do_fopen failed");
+
+    set_time(res.timers, HDF5_FINE_WRITE_FIXED_DIMS, TSTART);
+    hrc = do_write(&res, &fd, &param, ndsets, nbytes, buf_size, buffer);
+    hrc == SUCCESS;
+    set_time(res.timers, HDF5_FINE_WRITE_FIXED_DIMS, TSTOP);
+
+    VRFY((hrc == SUCCESS), "do_write failed");
+
+    /* Close file for write */
+    hrc = do_fclose(iot, &fd);
+
+    set_time(res.timers, HDF5_GROSS_WRITE_FIXED_DIMS, TSTOP);
+    VRFY((hrc == SUCCESS), "do_fclose failed");
+
+    if (!param.h5_write_only) {
+        /*
+         * Read performance measurement
+         */
+        /* Need barrier to make sure everyone is done writing and has
+         * closed the file.  Also to make sure everyone starts reading
+         * at the same time.
+         */
+        MPI_Barrier(pio_comm_g);
+
+        /* Open file for read */
+        set_time(res.timers, HDF5_GROSS_READ_FIXED_DIMS, TSTART);
+        hrc = do_fopen(&param, fname, &fd, PIO_READ);
+
+        VRFY((hrc == SUCCESS), "do_fopen failed");
+
+        set_time(res.timers, HDF5_FINE_READ_FIXED_DIMS, TSTART);
+        hrc = do_read(&res, &fd, &param, ndsets, nbytes, buf_size, buffer);
+        set_time(res.timers, HDF5_FINE_READ_FIXED_DIMS, TSTOP);
+        VRFY((hrc == SUCCESS), "do_read failed");
+
+        /* Close file for read */
+        hrc = do_fclose(iot, &fd);
+
+        set_time(res.timers, HDF5_GROSS_READ_FIXED_DIMS, TSTOP);
+        VRFY((hrc == SUCCESS), "do_fclose failed");
+    }
+
+    /* Need barrier to make sure everyone is done with the file */
+    /* before it may be removed by do_cleanupfile */
+    MPI_Barrier(pio_comm_g);
+    do_cleanupfile(iot, fname);
+    }
+
+done:
+    /* clean up */
+    /* release HDF5 objects */
+
+    /* close any opened files */
+    /* no remove(fname) because that should have happened normally. */
+    switch (iot) {
+        case POSIXIO:
+            if (fd.posixfd != -1)
+            hrc = do_fclose(iot, &fd);
+            break;
+        case MPIO:
+            if (fd.mpifd != MPI_FILE_NULL)
+            hrc = do_fclose(iot, &fd);
+            break;
+        case PHDF5:
+            if (fd.h5fd != -1)
+            hrc = do_fclose(iot, &fd);
+            break;
+    }
+
+    /* release generic resources */
+    if(buffer)
+    free(buffer);
+    res.ret_code = ret_code;
+    return res;
+}
+
+/*
+ * Function:    pio_create_filename
+ * Purpose:     Create a new filename to write to. Determine the correct
+ *              suffix to append to the filename by the type of I/O we're
+ *              doing. Also, place in the /tmp/{$USER,$LOGIN} directory if
+ *              USER or LOGIN are specified in the environment.
+ * Return:      Pointer to filename or NULL
+ * Programmer:  Bill Wendling, 21. November 2001
+ * Modifications:
+ */
+    static char *
+pio_create_filename(iotype iot, const char *base_name, char *fullname, size_t size)
+{
+    const char *prefix, *suffix = "";
+    char *ptr, last = '\0';
+    size_t i, j;
+
+    if (!base_name || !fullname || size < 1)
+        return NULL;
+
+    HDmemset(fullname, 0, size);
+
+    switch (iot) {
+        case POSIXIO:
+            suffix = ".posix";
+            break;
+        case MPIO:
+            suffix = ".mpio";
+            break;
+        case PHDF5:
+            suffix = ".h5";
+            break;
+    }
+
+    /* First use the environment variable and then try the constant */
+    prefix = HDgetenv("HDF5_PARAPREFIX");
+
+#ifdef HDF5_PARAPREFIX
+    if (!prefix)
+        prefix = HDF5_PARAPREFIX;
+#endif  /* HDF5_PARAPREFIX */
+
+    /* Prepend the prefix value to the base name */
+    if (prefix && *prefix) {
+        /* If the prefix specifies the HDF5_PARAPREFIX directory, then
+         * default to using the "/tmp/$USER" or "/tmp/$LOGIN"
+         * directory instead. */
+        register char *user, *login, *subdir;
+
+        user = HDgetenv("USER");
+        login = HDgetenv("LOGIN");
+        subdir = (user ? user : login);
+
+        if (subdir) {
+            for (i = 0; i < size-1 && prefix[i]; i++)
+                fullname[i] = prefix[i];
+
+            fullname[i++] = '/';
+
+            for (j = 0; i < size && subdir[j]; i++, j++)
+                fullname[i] = subdir[j];
+        }
+        else {
+            /* We didn't append the prefix yet */
+            HDstrncpy(fullname, prefix, size);
+            fullname[size - 1] = '\0';
+        }
+
+        if ((HDstrlen(fullname) + HDstrlen(base_name) + 1) < size) {
+            /* Append the base_name with a slash first. Multiple slashes are
+             * handled below. */
+            h5_stat_t buf;
+
+            if (HDstat(fullname, &buf) < 0)
+                /* The directory doesn't exist just yet */
+                if (HDmkdir(fullname, (mode_t) 0755) < 0 && errno != EEXIST) {
+                    /* We couldn't make the "/tmp/${USER,LOGIN}" subdirectory.
+                     * Default to PREFIX's original prefix value. */
+                    HDstrcpy(fullname, prefix);
+                }
+
+            HDstrcat(fullname, "/");
+            HDstrcat(fullname, base_name);
+        }
+        else {
+            /* Buffer is too small */
+            return NULL;
+        }
+    }
+    else if (HDstrlen(base_name) >= size) {
+        /* Buffer is too small */
+        return NULL;
+    }
+    else {
+        HDstrcpy(fullname, base_name);
+    }
+
+    /* Append a suffix */
+    if (suffix) {
+        if (HDstrlen(fullname) + HDstrlen(suffix) >= size)
+            return NULL;
+
+        HDstrcat(fullname, suffix);
+    }
+
+    /* Remove any double slashes in the filename */
+    for (ptr = fullname, i = j = 0; ptr && i < size; i++, ptr++) {
+        if (*ptr != '/' || last != '/')
+            fullname[j++] = *ptr;
+
+        last = *ptr;
+    }
+
+    return fullname;
+}
+
+/*
+ * Function:        do_write
+ * Purpose:         Write the required amount of data to the file.
+ * Return:          SUCCESS or FAIL
+ * Programmer:      Albert Cheng, Bill Wendling, 2001/12/13
+ * Modifications:
+ *  Added 2D testing (Christian Chilan, 10. August 2005)
+ */
+    static herr_t
+do_write(results *res, file_descr *fd, parameters *parms, long ndsets,
+    off_t nbytes, size_t buf_size, void *buffer)
+{
+    int         ret_code = SUCCESS;
+    int         rc;             /*routine return code                   */
+    long        ndset;
+    size_t      blk_size;       /* The block size to subdivide the xfer buffer into */
+    off_t       nbytes_xfer;    /* Total number of bytes transferred so far */
+    size_t      nbytes_xfer_advance; /* Number of bytes transferred in a single I/O operation */
+    size_t      nbytes_toxfer;  /* Number of bytes to transfer a particular time */
+    char        dname[64];
+    off_t       dset_offset=0;  /*dataset offset in a file              */
+    off_t       bytes_begin[2];    /*first elmt this process transfer      */
+    off_t       bytes_count;    /*number of elmts this process transfer */
+    off_t       snbytes=0;  /*size of a side of the dataset square  */
+    unsigned char *buf_p;       /* Current buffer pointer               */
+
+    /* POSIX variables */
+    off_t       file_offset;    /* File offset of the next transfer     */
+    off_t       file_offset_advance;    /* File offset advance after each I/O operation */
+    off_t       posix_file_offset;    /* Base file offset of the next transfer      */
+
+    /* MPI variables */
+    MPI_Offset  mpi_file_offset;    /* Base file offset of the next transfer*/
+    MPI_Offset  mpi_offset;         /* Offset in MPI file                   */
+    MPI_Offset  mpi_offset_advance; /* Offset advance after each I/O operation */
+    MPI_Datatype mpi_file_type;     /* MPI derived type for 1D file            */
+    MPI_Datatype mpi_blk_type;      /* MPI derived type for 1D buffer          */
+    MPI_Datatype mpi_cont_type;     /* MPI derived type for 2D contiguous file */
+    MPI_Datatype mpi_partial_buffer_cont;       /* MPI derived type for partial 2D contiguous buffer */
+    MPI_Datatype mpi_inter_type;    /* MPI derived type for 2D interleaved file  */
+    MPI_Datatype mpi_partial_buffer_inter;      /* MPI derived type for partial 2D interleaved buffer */
+    MPI_Datatype mpi_full_buffer;       /* MPI derived type for 2D full buffer */
+    MPI_Datatype mpi_full_chunk;        /* MPI derived type for 2D full chunk */
+    MPI_Datatype mpi_chunk_inter_type;  /* MPI derived type for 2D chunk interleaved file */
+    MPI_Datatype mpi_collective_type;   /* Generic MPI derived type for 2D collective access */
+    MPI_Status  mpi_status;
+    int         mrc;                /* MPI return code                      */
+
+    /* HDF5 variables */
+    herr_t      hrc;                    /*HDF5 return code              */
+    hsize_t     h5dims[2];              /*dataset dim sizes             */
+    hid_t       h5dset_space_id = -1;   /*dataset space ID              */
+    hid_t       h5mem_space_id = -1;    /*memory dataspace ID           */
+    hid_t       h5ds_id = -1;           /*dataset handle                */
+    hsize_t     h5block[2];     /*dataspace selection           */
+    hsize_t     h5stride[2];
+    hsize_t     h5count[2];
+    hsize_t     h5start[2];
+    hssize_t    h5offset[2];            /* Selection offset within dataspace */
+    hid_t       h5dcpl = -1;            /* Dataset creation property list */
+    hid_t       h5dxpl = -1;            /* Dataset transfer property list */
+
+    /* Get the parameters from the parameter block */
+    blk_size=parms->blk_size;
+
+    /* There are two kinds of transfer patterns, contiguous and interleaved.
+     * Let 0,1,2,...,n be data accessed by process 0,1,2,...,n
+     *     where n is rank of the last process.
+     * In contiguous pattern, data are accessed as
+     *    000...111...222...nnn...
+     * In interleaved pattern, data are accessed as
+     *    012...n012...n...
+     * These are all in the scope of one dataset.
+     */
+
+    /* 1D dataspace */
+    if (!parms->dim2d){
+        /* Contiguous Pattern: */
+        if (!parms->interleaved) {
+            bytes_begin[0] = (off_t)(((double)nbytes*pio_mpi_rank_g)/pio_mpi_nprocs_g);
+        } /* end if */
+        /* Interleaved Pattern: */
+        else {
+            bytes_begin[0] = (off_t)(blk_size*pio_mpi_rank_g);
+        } /* end else */
+
+        /* Prepare buffer for verifying data */
+        if (parms->verify)
+            memset(buffer,pio_mpi_rank_g+1,buf_size);
+    }/* end if */
+    /* 2D dataspace */
+    else {
+        /* nbytes is always the number of bytes per dataset (1D or 2D). If the
+           dataspace is 2D, snbytes is the size of a side of the dataset square.
+         */
+        snbytes = (off_t)sqrt(nbytes);
+
+        /* Contiguous Pattern: */
+        if (!parms->interleaved) {
+            bytes_begin[0] = (off_t)((double)snbytes*pio_mpi_rank_g / pio_mpi_nprocs_g);
+            bytes_begin[1] = 0;
+        } /* end if */
+        /* Interleaved Pattern: */
+        else {
+            bytes_begin[0] = 0;
+
+            if(!parms->h5_use_chunks || parms->io_type==PHDF5)
+                bytes_begin[1] = (off_t)(blk_size*pio_mpi_rank_g);
+            else
+                bytes_begin[1] = (off_t)(blk_size*blk_size*pio_mpi_rank_g);
+        } /* end else */
+
+        /* Prepare buffer for verifying data */
+        if (parms->verify)
+            memset(buffer,pio_mpi_rank_g+1,buf_size*blk_size);
+    } /* end else */
+
+
+    /* Calculate the total number of bytes (bytes_count) to be
+     * transferred by this process. It may be different for different
+     * transfer pattern due to rounding to integral values.
+     */
+    /*
+     * Calculate the beginning bytes of this process and the next.
+     * bytes_count is the difference between these two beginnings.
+     * This way, it eliminates any rounding errors.
+     * (This is tricky, don't mess with the formula, rounding errors
+     * can easily get introduced) */
+    bytes_count = (off_t)(((double)nbytes*(pio_mpi_rank_g+1)) / pio_mpi_nprocs_g)
+    - (off_t)(((double)nbytes*pio_mpi_rank_g) / pio_mpi_nprocs_g);
+
+    /* debug */
+    if (pio_debug_level >= 4) {
+        HDprint_rank(output);
+        if (!parms->dim2d) {
+        HDfprintf(output, "Debug(do_write): "
+            "buf_size=%zu, bytes_begin=%" H5_PRINTF_LL_WIDTH "d, bytes_count=%" H5_PRINTF_LL_WIDTH "d\n",
+            buf_size, (long long)bytes_begin[0],
+            (long long)bytes_count);
+        } else {
+        HDfprintf(output, "Debug(do_write): "
+            "linear buf_size=%zu, bytes_begin=(%" H5_PRINTF_LL_WIDTH "d,%" H5_PRINTF_LL_WIDTH "d), bytes_count=%" H5_PRINTF_LL_WIDTH "d\n",
+            buf_size*blk_size, (long long)bytes_begin[0],
+            (long long)bytes_begin[1], (long long)bytes_count);
+        }
+    }
+
+    /* I/O Access specific setup */
+    switch (parms->io_type) {
+    case POSIXIO:
+        /* No extra setup */
+        break;
+
+    case MPIO: /* MPI-I/O setup */
+        /* 1D dataspace */
+        if (!parms->dim2d){
+            /* Build block's derived type */
+            mrc = MPI_Type_contiguous((int)blk_size,
+                MPI_BYTE, &mpi_blk_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Build file's derived type */
+            mrc = MPI_Type_vector((int)(buf_size/blk_size), (int)1,
+                (int)pio_mpi_nprocs_g, mpi_blk_type, &mpi_file_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit file type */
+            mrc = MPI_Type_commit( &mpi_file_type );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Commit buffer type */
+            mrc = MPI_Type_commit( &mpi_blk_type );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+        } /* end if */
+        /* 2D dataspace */
+        else {
+            /* Build partial buffer derived type for contiguous access */
+
+            mrc = MPI_Type_contiguous((int)buf_size, MPI_BYTE,
+                &mpi_partial_buffer_cont);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit partial buffer derived type */
+            mrc = MPI_Type_commit(&mpi_partial_buffer_cont);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Build contiguous file's derived type */
+            mrc = MPI_Type_vector((int)blk_size, (int)1, (int)(snbytes/buf_size),
+                mpi_partial_buffer_cont, &mpi_cont_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit contiguous file type */
+            mrc = MPI_Type_commit(&mpi_cont_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Build partial buffer derived type for interleaved access */
+            mrc = MPI_Type_contiguous((int)blk_size, MPI_BYTE,
+                &mpi_partial_buffer_inter);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit partial buffer derived type */
+            mrc = MPI_Type_commit(&mpi_partial_buffer_inter);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Build interleaved file's derived type */
+            mrc = MPI_Type_vector((int)buf_size, (int)1, (int)(snbytes/blk_size),
+                mpi_partial_buffer_inter, &mpi_inter_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit interleaved file type */
+            mrc = MPI_Type_commit(&mpi_inter_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Build full buffer derived type */
+            mrc = MPI_Type_contiguous((int)(blk_size*buf_size), MPI_BYTE,
+                &mpi_full_buffer);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit full buffer derived type */
+            mrc = MPI_Type_commit(&mpi_full_buffer);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Build full chunk derived type */
+            mrc = MPI_Type_contiguous((int)(blk_size*blk_size), MPI_BYTE,
+                &mpi_full_chunk);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit full chunk derived type */
+            mrc = MPI_Type_commit(&mpi_full_chunk);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Build chunk interleaved file's derived type */
+            mrc = MPI_Type_vector((int)(buf_size/blk_size), (int)1, (int)(snbytes/blk_size),
+                mpi_full_chunk, &mpi_chunk_inter_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit chunk interleaved file type */
+            mrc = MPI_Type_commit(&mpi_chunk_inter_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+        } /* end else */
+        break;
+
+    case PHDF5: /* HDF5 setup */
+        /* 1D dataspace */
+        if (!parms->dim2d){
+            if(nbytes>0) {
+                /* define a contiguous dataset of nbytes native bytes */
+                h5dims[0] = nbytes;
+                h5dset_space_id = H5Screate_simple(1, h5dims, NULL);
+                VRFY((h5dset_space_id >= 0), "H5Screate_simple");
+
+                /* Set up the file dset space id to select the pattern to access */
+                if (!parms->interleaved){
+                /* Contiguous pattern */
+                h5start[0] = bytes_begin[0];
+                h5stride[0] = h5block[0] = blk_size;
+                h5count[0] = buf_size/blk_size;
+                } /* end if */
+                else {
+                /* Interleaved access pattern */
+                /* Skip offset over blocks of other processes */
+                h5start[0] = bytes_begin[0];
+                h5stride[0] = blk_size*pio_mpi_nprocs_g;
+                h5block[0] = blk_size;
+                h5count[0] = buf_size/blk_size;
+                } /* end else */
+                hrc = H5Sselect_hyperslab(h5dset_space_id, H5S_SELECT_SET,
+                    h5start, h5stride, h5count, h5block);
+                VRFY((hrc >= 0), "H5Sselect_hyperslab");
+            } /* end if */
+            else {
+                h5dset_space_id = H5Screate(H5S_SCALAR);
+                VRFY((h5dset_space_id >= 0), "H5Screate");
+            } /* end else */
+
+            /* Create the memory dataspace that corresponds to the xfer buffer */
+            if(buf_size>0) {
+                h5dims[0] = buf_size;
+                h5mem_space_id = H5Screate_simple(1, h5dims, NULL);
+                VRFY((h5mem_space_id >= 0), "H5Screate_simple");
+            } /* end if */
+            else {
+                h5mem_space_id = H5Screate(H5S_SCALAR);
+                VRFY((h5mem_space_id >= 0), "H5Screate");
+            } /* end else */
+        } /* end if */
+        /* 2D dataspace */
+        else {
+            if(nbytes>0) {
+                /* define a contiguous dataset of nbytes native bytes */
+                h5dims[0] = snbytes;
+                h5dims[1] = snbytes;
+                h5dset_space_id = H5Screate_simple(2, h5dims, NULL);
+                VRFY((h5dset_space_id >= 0), "H5Screate_simple");
+
+                /* Set up the file dset space id to select the pattern to access */
+                if (!parms->interleaved){
+                /* Contiguous pattern */
+                h5start[0] = bytes_begin[0];
+                h5start[1] = bytes_begin[1];
+                h5stride[0] = 1;
+                h5stride[1] = h5block[0] = h5block[1] = blk_size;
+                h5count[0] = 1;
+                h5count[1] = buf_size/blk_size;
+                } /* end if */
+                else {
+                /* Interleaved access pattern */
+                /* Skip offset over blocks of other processes */
+                h5start[0] = bytes_begin[0];
+                h5start[1] = bytes_begin[1];
+                h5stride[0] = blk_size;
+                h5stride[1] = blk_size*pio_mpi_nprocs_g;
+                h5block[0] = h5block[1] = blk_size;
+                h5count[0] = buf_size/blk_size;
+                h5count[1] = 1;
+                } /* end else */
+                hrc = H5Sselect_hyperslab(h5dset_space_id, H5S_SELECT_SET,
+                    h5start, h5stride, h5count, h5block);
+                VRFY((hrc >= 0), "H5Sselect_hyperslab");
+            } /* end if */
+            else {
+                h5dset_space_id = H5Screate(H5S_SCALAR);
+                VRFY((h5dset_space_id >= 0), "H5Screate");
+            } /* end else */
+
+            /* Create the memory dataspace that corresponds to the xfer buffer */
+            if(buf_size>0) {
+                if (!parms->interleaved){
+                h5dims[0] = blk_size;
+                h5dims[1] = buf_size;
+                }else{
+                h5dims[0] = buf_size;
+                h5dims[1] = blk_size;
+                }
+                h5mem_space_id = H5Screate_simple(2, h5dims, NULL);
+                VRFY((h5mem_space_id >= 0), "H5Screate_simple");
+            } /* end if */
+            else {
+                h5mem_space_id = H5Screate(H5S_SCALAR);
+                VRFY((h5mem_space_id >= 0), "H5Screate");
+            } /* end else */
+        } /* end else */
+
+        /* Create the dataset transfer property list */
+        h5dxpl = H5Pcreate(H5P_DATASET_XFER);
+        if (h5dxpl < 0) {
+        fprintf(stderr, "HDF5 Property List Create failed\n");
+        GOTOERROR(FAIL);
+        }
+
+        /* Change to collective I/O, if asked */
+        if(parms->collective) {
+            hrc = H5Pset_dxpl_mpio(h5dxpl, H5FD_MPIO_COLLECTIVE);
+            if (hrc < 0) {
+                fprintf(stderr, "HDF5 Property List Set failed\n");
+                GOTOERROR(FAIL);
+            } /* end if */
+        } /* end if */
+        break;
+    } /* end switch */
+
+    for (ndset = 1; ndset <= ndsets; ++ndset) {
+
+    /* Calculate dataset offset within a file */
+
+    /* create dataset */
+    switch (parms->io_type) {
+        case POSIXIO:
+        case MPIO:
+            /* both posix and mpi io just need dataset offset in file*/
+            dset_offset = (ndset - 1) * nbytes;
+            break;
+
+        case PHDF5:
+            h5dcpl = H5Pcreate(H5P_DATASET_CREATE);
+            if (h5dcpl < 0) {
+                fprintf(stderr, "HDF5 Property List Create failed\n");
+                GOTOERROR(FAIL);
+            }
+            /* 1D dataspace */
+            if (!parms->dim2d){
+                /* Make the dataset chunked if asked */
+                if(parms->h5_use_chunks) {
+                /* Set the chunk size to be the same as the buffer size */
+                h5dims[0] = blk_size;
+                hrc = H5Pset_chunk(h5dcpl, 1, h5dims);
+                if (hrc < 0) {
+                    fprintf(stderr, "HDF5 Property List Set failed\n");
+                    GOTOERROR(FAIL);
+                } /* end if */
+                } /* end if */
+            }/* end if */
+            else{
+                /* 2D dataspace */
+                if(parms->h5_use_chunks) {
+                /* Set the chunk size to be the same as the block size */
+                h5dims[0] = blk_size;
+                h5dims[1] = blk_size;
+                hrc = H5Pset_chunk(h5dcpl, 2, h5dims);
+                if (hrc < 0) {
+                    fprintf(stderr, "HDF5 Property List Set failed\n");
+                    GOTOERROR(FAIL);
+                } /* end if */
+                } /* end if */
+            }/* end else */
+
+            sprintf(dname, "Dataset_%ld", ndset);
+            h5ds_id = H5DCREATE(fd->h5fd, dname, ELMT_H5_TYPE,
+                h5dset_space_id, h5dcpl);
+
+            if (h5ds_id < 0) {
+                fprintf(stderr, "HDF5 Dataset Create failed\n");
+                GOTOERROR(FAIL);
+            }
+
+            hrc = H5Pclose(h5dcpl);
+            /* verifying the close of the dcpl */
+            if (hrc < 0) {
+                fprintf(stderr, "HDF5 Property List Close failed\n");
+                GOTOERROR(FAIL);
+            }
+            break;
+    }
+
+    /* The task is to transfer bytes_count bytes, starting at
+     * bytes_begin position, using transfer buffer of buf_size bytes.
+     * If interleaved, select buf_size at a time, in round robin
+     * fashion, according to number of process. Otherwise, select
+     * all bytes_count in contiguous.
+     */
+    nbytes_xfer = 0 ;
+
+    /* 1D dataspace */
+    if (!parms->dim2d){
+        /* Set base file offset for all I/O patterns and POSIX access */
+        posix_file_offset = dset_offset + bytes_begin[0];
+
+        /* Set base file offset for all I/O patterns and MPI access */
+        mpi_file_offset = (MPI_Offset)(dset_offset + bytes_begin[0]);
+    } /* end if */
+    else {
+        /* Set base file offset for all I/O patterns and POSIX access */
+        posix_file_offset=dset_offset + bytes_begin[0]*snbytes+
+        bytes_begin[1];
+
+        /* Set base file offset for all I/O patterns and MPI access */
+        mpi_file_offset=(MPI_Offset)(dset_offset + bytes_begin[0]*snbytes+
+            bytes_begin[1]);
+    } /* end else */
+
+    /* Start "raw data" write timer */
+    set_time(res->timers, HDF5_RAW_WRITE_FIXED_DIMS, TSTART);
+
+    while (nbytes_xfer < bytes_count){
+        /* Write */
+        /* Calculate offset of write within a dataset/file */
+        switch (parms->io_type) {
+        case POSIXIO:
+            /* 1D dataspace */
+            if (!parms->dim2d){
+                /* Contiguous pattern */
+                if (!parms->interleaved) {
+                    /* Compute file offset */
+                    file_offset = posix_file_offset + (off_t)nbytes_xfer;
+
+                    /* only care if seek returns error */
+                    rc = POSIXSEEK(fd->posixfd, file_offset) < 0 ? -1 : 0;
+                    VRFY((rc==0), "POSIXSEEK");
+
+                    /* check if all bytes are written */
+                    rc = ((ssize_t)buf_size ==
+                        POSIXWRITE(fd->posixfd, buffer, buf_size));
+                    VRFY((rc != 0), "POSIXWRITE");
+
+                    /* Advance global offset in dataset */
+                    nbytes_xfer+=buf_size;
+                } /* end if */
+                /* Interleaved access pattern */
+                else {
+                    /* Set the base of user's buffer */
+                    buf_p=(unsigned char *)buffer;
+
+                    /* Set the number of bytes to transfer this time */
+                    nbytes_toxfer = buf_size;
+
+                    /* Loop over the buffers to write */
+                    while(nbytes_toxfer>0) {
+                        /* Skip offset over blocks of other processes */
+                        file_offset = posix_file_offset +
+                            (off_t)(nbytes_xfer*pio_mpi_nprocs_g);
+
+                        /* only care if seek returns error */
+                        rc = POSIXSEEK(fd->posixfd, file_offset) < 0 ? -1 : 0;
+                        VRFY((rc==0), "POSIXSEEK");
+
+                        /* check if all bytes are written */
+                        rc = ((ssize_t)blk_size ==
+                            POSIXWRITE(fd->posixfd, buf_p, blk_size));
+                        VRFY((rc != 0), "POSIXWRITE");
+
+                        /* Advance location in buffer */
+                        buf_p+=blk_size;
+
+                        /* Advance global offset in dataset */
+                        nbytes_xfer+=blk_size;
+
+                        /* Decrement number of bytes left this time */
+                        nbytes_toxfer-=blk_size;
+                    } /* end while */
+                } /* end else */
+            } /* end if */
+            /* 2D dataspace */
+            else {
+                /* Contiguous storage */
+                if (!parms->h5_use_chunks) {
+                    /* Contiguous access pattern */
+                    if (!parms->interleaved) {
+                        /* Compute file offset */
+                        file_offset=posix_file_offset+(off_t)(((nbytes_xfer/blk_size)
+                            /snbytes)*(blk_size*snbytes)+((nbytes_xfer/blk_size)%snbytes));
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = buf_size;
+
+                        /* Global offset advance after each I/O operation */
+                        file_offset_advance = (off_t)snbytes;
+                    } /* end if */
+                    /* Interleaved access pattern */
+                    else {
+                        /* Compute file offset */
+                        file_offset=posix_file_offset+(off_t)((((nbytes_xfer/buf_size)
+                            *pio_mpi_nprocs_g)/snbytes)*(buf_size*snbytes)
+                            +((nbytes_xfer/buf_size)*pio_mpi_nprocs_g)%snbytes);
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = blk_size;
+
+                        /* Global offset advance after each I/O operation */
+                        file_offset_advance = (off_t)snbytes;
+                    } /* end else */
+                } /* end if */
+                /* Chunked storage */
+                else {
+                    /*Contiguous access pattern */
+                    if (!parms->interleaved) {
+                        /* Compute file offset */
+                        file_offset=posix_file_offset+(off_t)nbytes_xfer;
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = blk_size * buf_size;
+
+                        /* Global offset advance after each I/O operation */
+                        file_offset_advance = 0;
+                    } /* end if */
+                    /*Interleaved access pattern */
+                    else {
+                        /* Compute file offset */
+                        /* Before simplification */
+                        /* file_offset=posix_file_offset+(off_t)((nbytes_xfer/(buf_size/blk_size)
+                        *pio_mpi_nprocs_g)/(snbytes/blk_size*(blk_size*blk_size))*(buf_size/blk_size
+                        *snbytes/blk_size*(blk_size*blk_size))+((nbytes_xfer/(buf_size/blk_size))
+                        *pio_mpi_nprocs_g)%(snbytes/blk_size*(blk_size*blk_size))); */
+
+                        file_offset=posix_file_offset+(off_t)(((nbytes_xfer/(buf_size/blk_size)
+                        *pio_mpi_nprocs_g)/(snbytes*blk_size))*(buf_size*snbytes)+((nbytes_xfer/(buf_size/blk_size))
+                        *pio_mpi_nprocs_g)%(snbytes*blk_size));
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = blk_size * blk_size;
+
+                        /* Global offset advance after each I/O operation */
+                        /* file_offset_advance = (off_t)(snbytes/blk_size*(blk_size*blk_size)); */
+                        file_offset_advance = (off_t)(snbytes*blk_size);
+                    } /* end else */
+                } /* end else */
+
+                /* Common code for file access */
+
+                /* Set the base of user's buffer */
+                buf_p = (unsigned char *)buffer;
+
+                /* Set the number of bytes to transfer this time */
+                nbytes_toxfer = buf_size*blk_size;
+
+                /* Loop over portions of the buffer to write */
+                while(nbytes_toxfer>0){
+                    /* only care if seek returns error */
+                    rc = POSIXSEEK(fd->posixfd, file_offset) < 0 ? -1 : 0;
+                    VRFY((rc==0), "POSIXSEEK");
+
+                    /* check if all bytes are written */
+                    rc = ((ssize_t)nbytes_xfer_advance ==
+                        POSIXWRITE(fd->posixfd, buf_p, nbytes_xfer_advance));
+                    VRFY((rc != 0), "POSIXWRITE");
+
+                    /* Advance location in buffer */
+                    buf_p+=nbytes_xfer_advance;
+
+                    /* Advance global offset in dataset */
+                    nbytes_xfer+=nbytes_xfer_advance;
+
+                    /* Decrement number of bytes left this time */
+                    nbytes_toxfer-=nbytes_xfer_advance;
+
+                    /* Partially advance file offset */
+                    file_offset+=file_offset_advance;
+                } /* end while */
+
+            } /* end else */
+
+            break;
+
+        case MPIO:
+            /* 1D dataspace */
+            if (!parms->dim2d){
+                /* Independent file access */
+                if(!parms->collective) {
+                    /* Contiguous pattern */
+                    if (!parms->interleaved){
+                        /* Compute offset in file */
+                        mpi_offset = mpi_file_offset +
+                            nbytes_xfer;
+
+                        /* Perform independent write */
+                        mrc = MPI_File_write_at(fd->mpifd, mpi_offset, buffer,
+                            (int)(buf_size/blk_size), mpi_blk_type,
+                            &mpi_status);
+                        VRFY((mrc==MPI_SUCCESS), "MPIO_WRITE");
+
+                        /* Advance global offset in dataset */
+                        nbytes_xfer+=buf_size;
+                    } /* end if */
+                    /* Interleaved access pattern */
+                    else {
+                        /* Set the base of user's buffer */
+                        buf_p=(unsigned char *)buffer;
+
+                        /* Set the number of bytes to transfer this time */
+                        nbytes_toxfer = buf_size;
+
+                        /* Loop over the buffers to write */
+                        while(nbytes_toxfer>0) {
+                            /* Skip offset over blocks of other processes */
+                            mpi_offset = mpi_file_offset +
+                            (nbytes_xfer*pio_mpi_nprocs_g);
+
+                            /* Perform independent write */
+                            mrc = MPI_File_write_at(fd->mpifd, mpi_offset, buf_p,
+                                (int)1, mpi_blk_type, &mpi_status);
+                            VRFY((mrc==MPI_SUCCESS), "MPIO_WRITE");
+
+                            /* Advance location in buffer */
+                            buf_p+=blk_size;
+
+                            /* Advance global offset in dataset */
+                            nbytes_xfer+=blk_size;
+
+                            /* Decrement number of bytes left this time */
+                            nbytes_toxfer-=blk_size;
+                        } /* end while */
+                    } /* end else */
+                } /* end if */
+                /* Collective file access */
+                else {
+                    /* Contiguous access pattern */
+                    if (!parms->interleaved){
+                        /* Compute offset in file */
+                        mpi_offset = mpi_file_offset +
+                            nbytes_xfer;
+
+                        /* Perform independent write */
+                        mrc = MPI_File_write_at_all(fd->mpifd, mpi_offset, buffer,
+                            (int)(buf_size/blk_size), mpi_blk_type, &mpi_status);
+                        VRFY((mrc==MPI_SUCCESS), "MPIO_WRITE");
+
+                        /* Advance global offset in dataset */
+                        nbytes_xfer+=buf_size;
+                    } /* end if */
+                    /* Interleaved access pattern */
+                    else {
+                        /* Compute offset in file */
+                        mpi_offset = mpi_file_offset +
+                            (nbytes_xfer*pio_mpi_nprocs_g);
+
+                        /* Set the file view */
+                        mrc = MPI_File_set_view(fd->mpifd, mpi_offset, mpi_blk_type,
+                            mpi_file_type, (char*)"native",  h5_io_info_g);
+                        VRFY((mrc==MPI_SUCCESS), "MPIO_VIEW");
+
+                        /* Perform write */
+                        mrc = MPI_File_write_at_all(fd->mpifd, 0, buffer,
+                            (int)(buf_size/blk_size), mpi_blk_type, &mpi_status);
+                        VRFY((mrc==MPI_SUCCESS), "MPIO_WRITE");
+
+                        /* Advance global offset in dataset */
+                        nbytes_xfer+=buf_size;
+                    } /* end else */
+                } /* end else */
+            } /* end if */
+            /* 2D dataspace */
+            else {
+                /* Contiguous storage */
+                if (!parms->h5_use_chunks) {
+                    /* Contiguous access pattern */
+                    if (!parms->interleaved) {
+                        /* Compute offset in file */
+                        mpi_offset=mpi_file_offset+((nbytes_xfer/blk_size)/snbytes)*
+                            (blk_size*snbytes)+((nbytes_xfer/blk_size)%snbytes);
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = buf_size;
+
+                        /* Global offset advance after each I/O operation */
+                        mpi_offset_advance = snbytes;
+
+                        /* MPI type to be used for collective access */
+                        mpi_collective_type = mpi_cont_type;
+                    } /* end if */
+                    /* Interleaved access pattern */
+                    else {
+                        /* Compute offset in file */
+                        mpi_offset=mpi_file_offset+(((nbytes_xfer/buf_size)*pio_mpi_nprocs_g)/snbytes)*
+                            (buf_size*snbytes)+((nbytes_xfer/buf_size)*pio_mpi_nprocs_g)%snbytes;
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = blk_size;
+
+                        /* Global offset advance after each I/O operation */
+                        mpi_offset_advance = snbytes;
+
+                        /* MPI type to be used for collective access */
+                        mpi_collective_type = mpi_inter_type;
+                    } /* end else */
+                } /* end if */
+                /* Chunked storage */
+                else {
+                    /*Contiguous access pattern */
+                    if (!parms->interleaved) {
+                        /* Compute offset in file */
+                        mpi_offset=mpi_file_offset+nbytes_xfer;
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = blk_size * buf_size;
+
+                        /* Global offset advance after each I/O operation */
+                        mpi_offset_advance = 0;
+
+                        /* MPI type to be used for collective access */
+                        mpi_collective_type = mpi_full_buffer;
+                    } /* end if */
+                    /*Interleaved access pattern */
+                    else {
+                        /* Compute offset in file */
+                        /* Before simplification */
+                        /* mpi_offset=mpi_file_offset+(nbytes_xfer/(buf_size/blk_size)
+                            *pio_mpi_nprocs_g)/(snbytes/blk_size*(blk_size*blk_size))*
+                            (buf_size/blk_size*snbytes/blk_size*(blk_size*blk_size))+
+                            ((nbytes_xfer/(buf_size/blk_size))*pio_mpi_nprocs_g)%(snbytes
+                            /blk_size*(blk_size*blk_size)); */
+                        mpi_offset=mpi_file_offset+((nbytes_xfer/(buf_size/blk_size)
+                            *pio_mpi_nprocs_g)/(snbytes*blk_size))*(buf_size*snbytes)
+                            +((nbytes_xfer/(buf_size/blk_size))*pio_mpi_nprocs_g)%(snbytes*blk_size);
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = blk_size * blk_size;
+
+                        /* Global offset advance after each I/O operation */
+                        /* mpi_offset_advance = (MPI_Offset)(snbytes/blk_size*(blk_size*blk_size)); */
+                        mpi_offset_advance = (MPI_Offset)(snbytes*blk_size);
+
+                        /* MPI type to be used for collective access */
+                        mpi_collective_type = mpi_chunk_inter_type;
+                    } /* end else */
+                } /* end else */
+
+                /* Common code for independent file access */
+                if (!parms->collective) {
+                    /* Set the base of user's buffer */
+                    buf_p = (unsigned char *)buffer;
+
+                    /* Set the number of bytes to transfer this time */
+                    nbytes_toxfer = buf_size * blk_size;
+
+                    /* Loop over portions of the buffer to write */
+                    while(nbytes_toxfer>0){
+                        /* Perform independent write */
+                        mrc = MPI_File_write_at(fd->mpifd, mpi_offset, buf_p,
+                            (int)nbytes_xfer_advance, MPI_BYTE, &mpi_status);
+                        VRFY((mrc==MPI_SUCCESS), "MPIO_WRITE");
+
+                        /* Advance location in buffer */
+                        buf_p+=nbytes_xfer_advance;
+
+                        /* Advance global offset in dataset */
+                        nbytes_xfer+=nbytes_xfer_advance;
+
+                        /* Decrement number of bytes left this time */
+                        nbytes_toxfer-=nbytes_xfer_advance;
+
+                        /* Partially advance global offset in dataset */
+                        mpi_offset+=mpi_offset_advance;
+                    } /* end while */
+                } /* end if */
+
+                /* Common code for collective file access */
+                else {
+                    /* Set the file view */
+                    mrc = MPI_File_set_view(fd->mpifd, mpi_offset, MPI_BYTE,
+                        mpi_collective_type, (char *)"native", h5_io_info_g);
+                    VRFY((mrc==MPI_SUCCESS), "MPIO_VIEW");
+
+                    /* Perform write */
+                    MPI_File_write_at_all(fd->mpifd, 0, buffer,(int)(buf_size*blk_size),
+                        MPI_BYTE, &mpi_status);
+                    VRFY((mrc==MPI_SUCCESS), "MPIO_WRITE");
+
+                    /* Advance global offset in dataset */
+                    nbytes_xfer+=buf_size*blk_size;
+                } /* end else */
+
+            } /* end else */
+
+            break;
+
+        case PHDF5:
+            /* 1D dataspace */
+            if (!parms->dim2d){
+            /* Set up the file dset space id to move the selection to process */
+            if (!parms->interleaved){
+                /* Contiguous pattern */
+                h5offset[0] = nbytes_xfer;
+            } /* end if */
+            else {
+                /* Interleaved access pattern */
+                /* Skip offset over blocks of other processes */
+                h5offset[0] = (nbytes_xfer*pio_mpi_nprocs_g);
+            } /* end else */
+            hrc = H5Soffset_simple(h5dset_space_id, h5offset);
+            VRFY((hrc >= 0), "H5Soffset_simple");
+
+            /* Write the buffer out */
+            hrc = H5Dwrite(h5ds_id, ELMT_H5_TYPE, h5mem_space_id,
+                h5dset_space_id, h5dxpl, buffer);
+            VRFY((hrc >= 0), "H5Dwrite");
+
+            /* Increment number of bytes transferred */
+            nbytes_xfer += buf_size;
+            } /* end if */
+            /* 2D dataspace */
+            else {
+            /* Set up the file dset space id to move the selection to process */
+            if (!parms->interleaved){
+                /* Contiguous pattern */
+                h5offset[0] = (nbytes_xfer/(snbytes*blk_size))*blk_size;
+                h5offset[1] = (nbytes_xfer%(snbytes*blk_size))/blk_size;
+
+            } /* end if */
+            else {
+                /* Interleaved access pattern */
+                /* Skip offset over blocks of other processes */
+                h5offset[0] = ((nbytes_xfer*pio_mpi_nprocs_g)/(snbytes*buf_size))*buf_size;
+                h5offset[1] = ((nbytes_xfer*pio_mpi_nprocs_g)%(snbytes*buf_size))/buf_size;
+
+            } /* end else */
+            hrc = H5Soffset_simple(h5dset_space_id, h5offset);
+            VRFY((hrc >= 0), "H5Soffset_simple");
+
+            /* Write the buffer out */
+            hrc = H5Dwrite(h5ds_id, ELMT_H5_TYPE, h5mem_space_id,
+                h5dset_space_id, h5dxpl, buffer);
+            VRFY((hrc >= 0), "H5Dwrite");
+
+            /* Increment number of bytes transferred */
+            nbytes_xfer += buf_size*blk_size;
+
+            } /* end else */
+
+            break;
+        } /* switch (parms->io_type) */
+    } /* end while */
+
+    /* Stop "raw data" write timer */
+    set_time(res->timers, HDF5_RAW_WRITE_FIXED_DIMS, TSTOP);
+
+    /* Calculate write time */
+
+    /* Close dataset. Only HDF5 needs to do an explicit close. */
+    if (parms->io_type == PHDF5) {
+        hrc = H5Dclose(h5ds_id);
+
+        if (hrc < 0) {
+        fprintf(stderr, "HDF5 Dataset Close failed\n");
+        GOTOERROR(FAIL);
+        }
+
+        h5ds_id = -1;
+    } /* end if */
+    } /* end for */
+
+done:
+    /* release MPI-I/O objects */
+    if (parms->io_type == MPIO) {
+        /* 1D dataspace */
+        if (!parms->dim2d){
+            /* Free file type */
+            mrc = MPI_Type_free( &mpi_file_type );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free buffer type */
+            mrc = MPI_Type_free( &mpi_blk_type );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+        } /* end if */
+        /* 2D dataspace */
+        else {
+            /* Free partial buffer type for contiguous access */
+            mrc = MPI_Type_free( &mpi_partial_buffer_cont );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free contiguous file type */
+            mrc = MPI_Type_free( &mpi_cont_type );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free partial buffer type for interleaved access */
+            mrc = MPI_Type_free( &mpi_partial_buffer_inter );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free interleaved file type */
+            mrc = MPI_Type_free( &mpi_inter_type );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free full buffer type */
+            mrc = MPI_Type_free(&mpi_full_buffer);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free full chunk type */
+            mrc = MPI_Type_free(&mpi_full_chunk);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free chunk interleaved file type */
+            mrc = MPI_Type_free(&mpi_chunk_inter_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+        } /* end else */
+    } /* end if */
+
+    /* release HDF5 objects */
+    if (h5dset_space_id != -1) {
+    hrc = H5Sclose(h5dset_space_id);
+    if (hrc < 0){
+        fprintf(stderr, "HDF5 Dataset Space Close failed\n");
+        ret_code = FAIL;
+    } else {
+        h5dset_space_id = -1;
+    }
+    }
+
+    if (h5mem_space_id != -1) {
+    hrc = H5Sclose(h5mem_space_id);
+    if (hrc < 0) {
+        fprintf(stderr, "HDF5 Memory Space Close failed\n");
+        ret_code = FAIL;
+    } else {
+        h5mem_space_id = -1;
+    }
+    }
+
+    if (h5dxpl != -1) {
+    hrc = H5Pclose(h5dxpl);
+    if (hrc < 0) {
+        fprintf(stderr, "HDF5 Dataset Transfer Property List Close failed\n");
+        ret_code = FAIL;
+    } else {
+        h5dxpl = -1;
+    }
+    }
+
+    return ret_code;
+}
+
+/*
+ * Function:        do_read
+ * Purpose:         read the required amount of data from the file.
+ * Return:          SUCCESS or FAIL
+ * Programmer:      Albert Cheng 2001/12/13
+ * Modifications:
+ *  Added 2D testing (Christian Chilan, 10. August 2005)
+ */
+    static herr_t
+do_read(results *res, file_descr *fd, parameters *parms, long ndsets,
+    off_t nbytes, size_t buf_size, void *buffer /*out*/)
+{
+    int         ret_code = SUCCESS;
+    int         rc;             /*routine return code                   */
+    long        ndset;
+    size_t      blk_size;       /* The block size to subdivide the xfer buffer into */
+    size_t      bsize;          /* Size of the actual buffer */
+    off_t       nbytes_xfer;    /* Total number of bytes transferred so far */
+    size_t      nbytes_xfer_advance; /* Number of bytes transferred in a single I/O operation */
+    size_t      nbytes_toxfer;  /* Number of bytes to transfer a particular time */
+    char        dname[64];
+    off_t       dset_offset=0;  /*dataset offset in a file              */
+    off_t       bytes_begin[2];    /*first elmt this process transfer      */
+    off_t       bytes_count;    /*number of elmts this process transfer */
+    off_t       snbytes=0;      /*size of a side of the dataset square */
+    unsigned char *buf_p;       /* Current buffer pointer               */
+
+    /* POSIX variables */
+    off_t       file_offset;    /* File offset of the next transfer    */
+    off_t       file_offset_advance; /* File offset advance after each I/O operation */
+    off_t       posix_file_offset;    /* Base file offset of the next transfer      */
+
+    /* MPI variables */
+    MPI_Offset  mpi_file_offset;/* Base file offset of the next transfer*/
+    MPI_Offset  mpi_offset;     /* Offset in MPI file                   */
+    MPI_Offset  mpi_offset_advance; /* Offset advance after each I/O operation */
+    MPI_Datatype mpi_file_type; /* MPI derived type for 1D file            */
+    MPI_Datatype mpi_blk_type;  /* MPI derived type for 1D buffer          */
+    MPI_Datatype mpi_cont_type; /* MPI derived type for 2D contiguous file */
+    MPI_Datatype mpi_partial_buffer_cont;       /* MPI derived type for partial 2D contiguous buffer */
+    MPI_Datatype mpi_inter_type;    /* MPI derived type for 2D interleaved file  */
+    MPI_Datatype mpi_partial_buffer_inter;      /* MPI derived type for partial 2D interleaved buffer */
+    MPI_Datatype mpi_full_buffer;       /* MPI derived type for 2D full buffer */
+    MPI_Datatype mpi_full_chunk;        /* MPI derived type for 2D full chunk */
+    MPI_Datatype mpi_chunk_inter_type;  /* MPI derived type for 2D chunk interleaved file */
+    MPI_Datatype mpi_collective_type;   /* Generic MPI derived type for 2D collective access */
+    MPI_Status  mpi_status;
+    int         mrc;            /* MPI return code                      */
+
+    /* HDF5 variables */
+    herr_t      hrc;                    /*HDF5 return code              */
+    hsize_t     h5dims[2];              /*dataset dim sizes             */
+    hid_t       h5dset_space_id = -1;   /*dataset space ID              */
+    hid_t       h5mem_space_id = -1;    /*memory dataspace ID           */
+    hid_t       h5ds_id = -1;           /*dataset handle                */
+    hsize_t h5block[2];     /*dataspace selection           */
+    hsize_t h5stride[2];
+    hsize_t h5count[2];
+    hsize_t h5start[2];
+    hssize_t    h5offset[2];            /* Selection offset within dataspace */
+    hid_t       h5dxpl = -1;            /* Dataset transfer property list */
+
+    /* Get the parameters from the parameter block */
+    blk_size=parms->blk_size;
+
+    /* There are two kinds of transfer patterns, contiguous and interleaved.
+     * Let 0,1,2,...,n be data accessed by process 0,1,2,...,n
+     *     where n is rank of the last process.
+     * In contiguous pattern, data are accessed as
+     *    000...111...222...nnn...
+     * In interleaved pattern, data are accessed as
+     *    012...n012...n...
+     * These are all in the scope of one dataset.
+     */
+
+    /* 1D dataspace */
+    if (!parms->dim2d){
+        bsize = buf_size;
+        /* Contiguous Pattern: */
+        if (!parms->interleaved) {
+             bytes_begin[0] = (off_t)(((double)nbytes*pio_mpi_rank_g)/pio_mpi_nprocs_g);
+        } /* end if */
+        /* Interleaved Pattern: */
+        else {
+            bytes_begin[0] = (off_t)(blk_size*pio_mpi_rank_g);
+        } /* end else */
+    }/* end if */
+    /* 2D dataspace */
+    else {
+        /* nbytes is always the number of bytes per dataset (1D or 2D). If the
+           dataspace is 2D, snbytes is the size of a side of the 'dataset square'.
+         */
+        snbytes = (off_t)sqrt(nbytes);
+
+        bsize = buf_size * blk_size;
+
+        /* Contiguous Pattern: */
+        if (!parms->interleaved) {
+            bytes_begin[0] = (off_t)((double)snbytes*pio_mpi_rank_g / pio_mpi_nprocs_g);
+            bytes_begin[1] = 0;
+        } /* end if */
+        /* Interleaved Pattern: */
+        else {
+            bytes_begin[0] = 0;
+
+            if (!parms->h5_use_chunks || parms->io_type==PHDF5)
+                bytes_begin[1] = (off_t)(blk_size*pio_mpi_rank_g);
+            else
+                bytes_begin[1] = (off_t)(blk_size*blk_size*pio_mpi_rank_g);
+        } /* end else */
+    } /* end else */
+
+    /* Calculate the total number of bytes (bytes_count) to be
+     * transferred by this process. It may be different for different
+     * transfer pattern due to rounding to integral values.
+     */
+    /*
+     * Calculate the beginning bytes of this process and the next.
+     * bytes_count is the difference between these two beginnings.
+     * This way, it eliminates any rounding errors.
+     * (This is tricky, don't mess with the formula, rounding errors
+     * can easily get introduced) */
+    bytes_count = (off_t)(((double)nbytes*(pio_mpi_rank_g+1)) / pio_mpi_nprocs_g)
+    - (off_t)(((double)nbytes*pio_mpi_rank_g) / pio_mpi_nprocs_g);
+
+    /* debug */
+    if (pio_debug_level >= 4) {
+        HDprint_rank(output);
+        if (!parms->dim2d) {
+        HDfprintf(output, "Debug(do_write): "
+            "buf_size=%zu, bytes_begin=%" H5_PRINTF_LL_WIDTH "d, bytes_count=%" H5_PRINTF_LL_WIDTH "d\n",
+            buf_size, (long long)bytes_begin[0],
+            (long long)bytes_count);
+        } else {
+        HDfprintf(output, "Debug(do_write): "
+            "linear buf_size=%zu, bytes_begin=(%" H5_PRINTF_LL_WIDTH "d,%" H5_PRINTF_LL_WIDTH "d), bytes_count=%" H5_PRINTF_LL_WIDTH "d\n",
+            buf_size*blk_size, (long long)bytes_begin[0],
+            (long long)bytes_begin[1], (long long)bytes_count);
+        }
+    }
+
+    /* I/O Access specific setup */
+    switch (parms->io_type) {
+    case POSIXIO:
+        /* No extra setup */
+        break;
+
+    case MPIO: /* MPI-I/O setup */
+        /* 1D dataspace */
+        if (!parms->dim2d){
+            /* Build block's derived type */
+            mrc = MPI_Type_contiguous((int)blk_size,
+                MPI_BYTE, &mpi_blk_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Build file's derived type */
+            mrc = MPI_Type_vector((int)(buf_size/blk_size), (int)1,
+                (int)pio_mpi_nprocs_g, mpi_blk_type, &mpi_file_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit file type */
+            mrc = MPI_Type_commit( &mpi_file_type );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Commit buffer type */
+            mrc = MPI_Type_commit( &mpi_blk_type );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+        } /* end if */
+        /* 2D dataspace */
+        else {
+            /* Build partial buffer derived type for contiguous access */
+            mrc = MPI_Type_contiguous((int)buf_size, MPI_BYTE,
+                &mpi_partial_buffer_cont);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit partial buffer derived type */
+            mrc = MPI_Type_commit(&mpi_partial_buffer_cont);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Build contiguous file's derived type */
+            mrc = MPI_Type_vector((int)blk_size, (int)1, (int)(snbytes/buf_size),
+                mpi_partial_buffer_cont, &mpi_cont_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit contiguous file type */
+            mrc = MPI_Type_commit(&mpi_cont_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Build partial buffer derived type for interleaved access */
+            mrc = MPI_Type_contiguous((int)blk_size, MPI_BYTE,
+                &mpi_partial_buffer_inter);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit partial buffer derived type */
+            mrc = MPI_Type_commit(&mpi_partial_buffer_inter);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Build interleaved file's derived type */
+            mrc = MPI_Type_vector((int)buf_size, (int)1, (int)(snbytes/blk_size),
+                mpi_partial_buffer_inter, &mpi_inter_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit interleaved file type */
+            mrc = MPI_Type_commit(&mpi_inter_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Build full buffer derived type */
+            mrc = MPI_Type_contiguous((int)(blk_size*buf_size), MPI_BYTE,
+                &mpi_full_buffer);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit full buffer derived type */
+            mrc = MPI_Type_commit(&mpi_full_buffer);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Build full chunk derived type */
+            mrc = MPI_Type_contiguous((int)(blk_size*blk_size), MPI_BYTE,
+                &mpi_full_chunk);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit full chunk derived type */
+            mrc = MPI_Type_commit(&mpi_full_chunk);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+
+            /* Build chunk interleaved file's derived type */
+            mrc = MPI_Type_vector((int)(buf_size/blk_size), (int)1, (int)(snbytes/blk_size),
+                mpi_full_chunk, &mpi_chunk_inter_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");
+
+            /* Commit chunk interleaved file type */
+            mrc = MPI_Type_commit(&mpi_chunk_inter_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
+        } /* end else */
+        break;
+
+    case PHDF5: /* HDF5 setup */
+        /* 1D dataspace */
+        if (!parms->dim2d){
+        if(nbytes>0) {
+            /* define a contiguous dataset of nbytes native bytes */
+            h5dims[0] = nbytes;
+            h5dset_space_id = H5Screate_simple(1, h5dims, NULL);
+            VRFY((h5dset_space_id >= 0), "H5Screate_simple");
+
+            /* Set up the file dset space id to select the pattern to access */
+            if (!parms->interleaved){
+            /* Contiguous pattern */
+            h5start[0] = bytes_begin[0];
+            h5stride[0] = h5block[0] = blk_size;
+            h5count[0] = buf_size/blk_size;
+            } /* end if */
+            else {
+            /* Interleaved access pattern */
+            /* Skip offset over blocks of other processes */
+            h5start[0] = bytes_begin[0];
+            h5stride[0] = blk_size*pio_mpi_nprocs_g;
+            h5block[0] = blk_size;
+            h5count[0] = buf_size/blk_size;
+            } /* end else */
+            hrc = H5Sselect_hyperslab(h5dset_space_id, H5S_SELECT_SET,
+                h5start, h5stride, h5count, h5block);
+            VRFY((hrc >= 0), "H5Sselect_hyperslab");
+        } /* end if */
+        else {
+            h5dset_space_id = H5Screate(H5S_SCALAR);
+            VRFY((h5dset_space_id >= 0), "H5Screate");
+        } /* end else */
+
+        /* Create the memory dataspace that corresponds to the xfer buffer */
+        if(buf_size>0) {
+            h5dims[0] = buf_size;
+            h5mem_space_id = H5Screate_simple(1, h5dims, NULL);
+            VRFY((h5mem_space_id >= 0), "H5Screate_simple");
+        } /* end if */
+        else {
+            h5mem_space_id = H5Screate(H5S_SCALAR);
+            VRFY((h5mem_space_id >= 0), "H5Screate");
+        } /* end else */
+        } /* end if */
+        /* 2D dataspace */
+        else {
+        if(nbytes>0) {
+            /* define a contiguous dataset of nbytes native bytes */
+            h5dims[0] = snbytes;
+            h5dims[1] = snbytes;
+            h5dset_space_id = H5Screate_simple(2, h5dims, NULL);
+            VRFY((h5dset_space_id >= 0), "H5Screate_simple");
+
+            /* Set up the file dset space id to select the pattern to access */
+            if (!parms->interleaved){
+            /* Contiguous pattern */
+            h5start[0] = bytes_begin[0];
+            h5start[1] = bytes_begin[1];
+            h5stride[0] = 1;
+            h5stride[1] = h5block[0] = h5block[1] = blk_size;
+            h5count[0] = 1;
+            h5count[1] = buf_size/blk_size;
+            } /* end if */
+            else {
+            /* Interleaved access pattern */
+            /* Skip offset over blocks of other processes */
+            h5start[0] = bytes_begin[0];
+            h5start[1] = bytes_begin[1];
+            h5stride[0] = blk_size;
+            h5stride[1] = blk_size*pio_mpi_nprocs_g;
+            h5block[0] = h5block[1] = blk_size;
+            h5count[0] = buf_size/blk_size;
+            h5count[1] = 1;
+            } /* end else */
+            hrc = H5Sselect_hyperslab(h5dset_space_id, H5S_SELECT_SET,
+                h5start, h5stride, h5count, h5block);
+            VRFY((hrc >= 0), "H5Sselect_hyperslab");
+        } /* end if */
+        else {
+            h5dset_space_id = H5Screate(H5S_SCALAR);
+            VRFY((h5dset_space_id >= 0), "H5Screate");
+        } /* end else */
+
+        /* Create the memory dataspace that corresponds to the xfer buffer */
+        if(buf_size>0) {
+            if (!parms->interleaved){
+            h5dims[0] = blk_size;
+            h5dims[1] = buf_size;
+            }else{
+            h5dims[0] = buf_size;
+            h5dims[1] = blk_size;
+            }
+            h5mem_space_id = H5Screate_simple(2, h5dims, NULL);
+            VRFY((h5mem_space_id >= 0), "H5Screate_simple");
+        } /* end if */
+        else {
+            h5mem_space_id = H5Screate(H5S_SCALAR);
+            VRFY((h5mem_space_id >= 0), "H5Screate");
+        } /* end else */
+        } /* end else */
+
+        /* Create the dataset transfer property list */
+        h5dxpl = H5Pcreate(H5P_DATASET_XFER);
+        if (h5dxpl < 0) {
+        fprintf(stderr, "HDF5 Property List Create failed\n");
+        GOTOERROR(FAIL);
+        }
+
+        /* Change to collective I/O, if asked */
+        if(parms->collective) {
+        hrc = H5Pset_dxpl_mpio(h5dxpl, H5FD_MPIO_COLLECTIVE);
+        if (hrc < 0) {
+            fprintf(stderr, "HDF5 Property List Set failed\n");
+            GOTOERROR(FAIL);
+        } /* end if */
+        } /* end if */
+        break;
+    } /* end switch */
+
+    for (ndset = 1; ndset <= ndsets; ++ndset) {
+
+    /* Calculate dataset offset within a file */
+
+    /* create dataset */
+    switch (parms->io_type) {
+        case POSIXIO:
+        case MPIO:
+        /* both posix and mpi io just need dataset offset in file*/
+        dset_offset = (ndset - 1) * nbytes;
+        break;
+
+        case PHDF5:
+        sprintf(dname, "Dataset_%ld", ndset);
+        h5ds_id = H5DOPEN(fd->h5fd, dname);
+        if (h5ds_id < 0) {
+            fprintf(stderr, "HDF5 Dataset open failed\n");
+            GOTOERROR(FAIL);
+        }
+
+        break;
+    }
+
+    /* The task is to transfer bytes_count bytes, starting at
+     * bytes_begin position, using transfer buffer of buf_size bytes.
+     * If interleaved, select buf_size at a time, in round robin
+     * fashion, according to number of process. Otherwise, select
+     * all bytes_count in contiguous.
+     */
+    nbytes_xfer = 0 ;
+
+    /* 1D dataspace */
+    if (!parms->dim2d){
+        /* Set base file offset for all I/O patterns and POSIX access */
+        posix_file_offset = dset_offset + bytes_begin[0];
+
+        /* Set base file offset for all I/O patterns and MPI access */
+        mpi_file_offset = (MPI_Offset)(dset_offset + bytes_begin[0]);
+    } /* end if */
+    else {
+        /* Set base file offset for all I/O patterns and POSIX access */
+        posix_file_offset=dset_offset + bytes_begin[0]*snbytes+
+        bytes_begin[1];
+
+        /* Set base file offset for all I/O patterns and MPI access */
+        mpi_file_offset=(MPI_Offset)(dset_offset + bytes_begin[0]*snbytes+
+            bytes_begin[1]);
+    } /* end else */
+
+    /* Start "raw data" read timer */
+    set_time(res->timers, HDF5_RAW_READ_FIXED_DIMS, TSTART);
+
+    while (nbytes_xfer < bytes_count){
+        /* Read */
+        /* Calculate offset of read within a dataset/file */
+        switch (parms->io_type) {
+        case POSIXIO:
+            /* 1D dataspace */
+            if (!parms->dim2d){
+                /* Contiguous pattern */
+                if (!parms->interleaved) {
+                    /* Compute file offset */
+                    file_offset = posix_file_offset + (off_t)nbytes_xfer;
+
+                    /* only care if seek returns error */
+                    rc = POSIXSEEK(fd->posixfd, file_offset) < 0 ? -1 : 0;
+                    VRFY((rc==0), "POSIXSEEK");
+
+                    /* check if all bytes are read */
+                    rc = ((ssize_t)buf_size ==
+                        POSIXREAD(fd->posixfd, buffer, buf_size));
+                    VRFY((rc != 0), "POSIXREAD");
+
+                    /* Advance global offset in dataset */
+                    nbytes_xfer+=buf_size;
+                } /* end if */
+                /* Interleaved access pattern */
+                else {
+                    /* Set the base of user's buffer */
+                    buf_p=(unsigned char *)buffer;
+
+                    /* Set the number of bytes to transfer this time */
+                    nbytes_toxfer = buf_size;
+
+                    /* Loop over the buffers to read */
+                    while(nbytes_toxfer>0) {
+                    /* Skip offset over blocks of other processes */
+                    file_offset = posix_file_offset +
+                        (off_t)(nbytes_xfer*pio_mpi_nprocs_g);
+
+                    /* only care if seek returns error */
+                    rc = POSIXSEEK(fd->posixfd, file_offset) < 0 ? -1 : 0;
+                    VRFY((rc==0), "POSIXSEEK");
+
+                    /* check if all bytes are read */
+                    rc = ((ssize_t)blk_size ==
+                        POSIXREAD(fd->posixfd, buf_p, blk_size));
+                    VRFY((rc != 0), "POSIXREAD");
+
+                    /* Advance location in buffer */
+                    buf_p+=blk_size;
+
+                    /* Advance global offset in dataset */
+                    nbytes_xfer+=blk_size;
+
+                    /* Decrement number of bytes left this time */
+                    nbytes_toxfer-=blk_size;
+                    } /* end while */
+                } /* end else */
+            } /* end if */
+            /* 2D dataspace */
+            else {
+                /* Contiguous storage */
+                if (!parms->h5_use_chunks) {
+                    /* Contiguous access pattern */
+                    if (!parms->interleaved) {
+                        /* Compute file offset */
+                        file_offset=posix_file_offset+(off_t)(((nbytes_xfer/blk_size)
+                            /snbytes)*(blk_size*snbytes)+((nbytes_xfer/blk_size)%snbytes));
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = buf_size;
+
+                        /* Global offset advance after each I/O operation */
+                        file_offset_advance = (off_t)snbytes;
+                    } /* end if */
+                    /* Interleaved access pattern */
+                    else {
+                        /* Compute file offset */
+                        file_offset=posix_file_offset+(off_t)((((nbytes_xfer/buf_size)
+                            *pio_mpi_nprocs_g)/snbytes)*(buf_size*snbytes)
+                            +((nbytes_xfer/buf_size)*pio_mpi_nprocs_g)%snbytes);
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = blk_size;
+
+                        /* Global offset advance after each I/O operation */
+                        file_offset_advance = (off_t)snbytes;
+                    } /* end else */
+                } /* end if */
+                /* Chunked storage */
+                else {
+                    /*Contiguous access pattern */
+                    if (!parms->interleaved) {
+                        /* Compute file offset */
+                        file_offset=posix_file_offset+(off_t)nbytes_xfer;
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = blk_size * buf_size;
+
+                        /* Global offset advance after each I/O operation */
+                        file_offset_advance = 0;
+                    } /* end if */
+                    /*Interleaved access pattern */
+                    else {
+                        /* Compute file offset */
+                        /* Before simplification */
+                        /* file_offset=posix_file_offset+(off_t)((nbytes_xfer/(buf_size/blk_size)
+                        *pio_mpi_nprocs_g)/(snbytes/blk_size*(blk_size*blk_size))*(buf_size/blk_size
+                        *snbytes/blk_size*(blk_size*blk_size))+((nbytes_xfer/(buf_size/blk_size))
+                        *pio_mpi_nprocs_g)%(snbytes/blk_size*(blk_size*blk_size))); */
+
+                        file_offset=posix_file_offset+(off_t)(((nbytes_xfer/(buf_size/blk_size)
+                        *pio_mpi_nprocs_g)/(snbytes*blk_size))*(buf_size*snbytes)+((nbytes_xfer/(buf_size/blk_size))
+                        *pio_mpi_nprocs_g)%(snbytes*blk_size));
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = blk_size * blk_size;
+
+                        /* Global offset advance after each I/O operation */
+                        /* file_offset_advance = (off_t)(snbytes/blk_size*(blk_size*blk_size)); */
+                        file_offset_advance = (off_t)(snbytes*blk_size);
+                    } /* end else */
+                } /* end else */
+
+                /* Common code for file access */
+
+                /* Set the base of user's buffer */
+                buf_p = (unsigned char *)buffer;
+
+                /* Set the number of bytes to transfer this time */
+                nbytes_toxfer = buf_size*blk_size;
+
+                /* Loop over portions of the buffer to read */
+                while(nbytes_toxfer>0){
+                    /* only care if seek returns error */
+                    rc = POSIXSEEK(fd->posixfd, file_offset) < 0 ? -1 : 0;
+                    VRFY((rc==0), "POSIXSEEK");
+
+                    /* check if all bytes are read */
+                    rc = ((ssize_t)nbytes_xfer_advance ==
+                        POSIXREAD(fd->posixfd, buf_p, nbytes_xfer_advance));
+                    VRFY((rc != 0), "POSIXREAD");
+
+                    /* Advance location in buffer */
+                    buf_p+=nbytes_xfer_advance;
+
+                    /* Advance global offset in dataset */
+                    nbytes_xfer+=nbytes_xfer_advance;
+
+                    /* Decrement number of bytes left this time */
+                    nbytes_toxfer-=nbytes_xfer_advance;
+
+                    /* Partially advance file offset */
+                    file_offset+=file_offset_advance;
+                } /* end while */
+
+            } /* end else */
+            break;
+
+        case MPIO:
+            /* 1D dataspace */
+            if (!parms->dim2d){
+                /* Independent file access */
+                if(!parms->collective) {
+                    /* Contiguous pattern */
+                    if (!parms->interleaved){
+                        /* Compute offset in file */
+                        mpi_offset = mpi_file_offset +
+                            nbytes_xfer;
+
+                        /* Perform independent read */
+                        mrc = MPI_File_read_at(fd->mpifd, mpi_offset, buffer,
+                            (int)(buf_size/blk_size), mpi_blk_type,
+                            &mpi_status);
+                        VRFY((mrc==MPI_SUCCESS), "MPIO_READ");
+
+                        /* Advance global offset in dataset */
+                        nbytes_xfer+=buf_size;
+                    } /* end if */
+                    /* Interleaved access pattern */
+                    else {
+                        /* Set the base of user's buffer */
+                        buf_p=(unsigned char *)buffer;
+
+                        /* Set the number of bytes to transfer this time */
+                        nbytes_toxfer = buf_size;
+
+                        /* Loop over the buffers to read */
+                        while(nbytes_toxfer>0) {
+                            /* Skip offset over blocks of other processes */
+                            mpi_offset = mpi_file_offset +
+                            (nbytes_xfer*pio_mpi_nprocs_g);
+
+                            /* Perform independent read */
+                            mrc = MPI_File_read_at(fd->mpifd, mpi_offset, buf_p,
+                                (int)1, mpi_blk_type, &mpi_status);
+                            VRFY((mrc==MPI_SUCCESS), "MPIO_READ");
+
+                            /* Advance location in buffer */
+                            buf_p+=blk_size;
+
+                            /* Advance global offset in dataset */
+                            nbytes_xfer+=blk_size;
+
+                            /* Decrement number of bytes left this time */
+                            nbytes_toxfer-=blk_size;
+                        } /* end while */
+                    } /* end else */
+                } /* end if */
+                /* Collective file access */
+                else {
+                    /* Contiguous access pattern */
+                    if (!parms->interleaved){
+                        /* Compute offset in file */
+                        mpi_offset = mpi_file_offset +
+                            nbytes_xfer;
+
+                        /* Perform collective read */
+                        mrc = MPI_File_read_at_all(fd->mpifd, mpi_offset, buffer,
+                            (int)(buf_size/blk_size), mpi_blk_type, &mpi_status);
+                        VRFY((mrc==MPI_SUCCESS), "MPIO_READ");
+
+                        /* Advance global offset in dataset */
+                        nbytes_xfer+=buf_size;
+                    } /* end if */
+                    /* Interleaved access pattern */
+                    else {
+                        /* Compute offset in file */
+                        mpi_offset = mpi_file_offset +
+                            (nbytes_xfer*pio_mpi_nprocs_g);
+
+                        /* Set the file view */
+                        mrc = MPI_File_set_view(fd->mpifd, mpi_offset, mpi_blk_type,
+                            mpi_file_type, (char*)"native",  h5_io_info_g);
+                        VRFY((mrc==MPI_SUCCESS), "MPIO_VIEW");
+
+                        /* Perform collective read */
+                        mrc = MPI_File_read_at_all(fd->mpifd, 0, buffer,
+                            (int)(buf_size/blk_size), mpi_blk_type, &mpi_status);
+                        VRFY((mrc==MPI_SUCCESS), "MPIO_READ");
+
+                        /* Advance global offset in dataset */
+                        nbytes_xfer+=buf_size;
+                    } /* end else */
+                } /* end else */
+            } /* end if */
+            /* 2D dataspace */
+            else {
+                /* Contiguous storage */
+                if (!parms->h5_use_chunks) {
+                    /* Contiguous access pattern */
+                    if (!parms->interleaved) {
+                        /* Compute offset in file */
+                        mpi_offset=mpi_file_offset+((nbytes_xfer/blk_size)/snbytes)*
+                            (blk_size*snbytes)+((nbytes_xfer/blk_size)%snbytes);
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = buf_size;
+
+                        /* Global offset advance after each I/O operation */
+                        mpi_offset_advance = snbytes;
+
+                        /* MPI type to be used for collective access */
+                        mpi_collective_type = mpi_cont_type;
+                    } /* end if */
+                    /* Interleaved access pattern */
+                    else {
+                        /* Compute offset in file */
+                        mpi_offset=mpi_file_offset+(((nbytes_xfer/buf_size)*pio_mpi_nprocs_g)/snbytes)*
+                            (buf_size*snbytes)+((nbytes_xfer/buf_size)*pio_mpi_nprocs_g)%snbytes;
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = blk_size;
+
+                        /* Global offset advance after each I/O operation */
+                        mpi_offset_advance = snbytes;
+
+                        /* MPI type to be used for collective access */
+                        mpi_collective_type = mpi_inter_type;
+                    } /* end else */
+                } /* end if */
+                /* Chunked storage */
+                else {
+                    /*Contiguous access pattern */
+                    if (!parms->interleaved) {
+                        /* Compute offset in file */
+                        mpi_offset=mpi_file_offset+nbytes_xfer;
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = blk_size * buf_size;
+
+                        /* Global offset advance after each I/O operation */
+                        mpi_offset_advance = 0;
+
+                        /* MPI type to be used for collective access */
+                        mpi_collective_type = mpi_full_buffer;
+                    } /* end if */
+                    /*Interleaved access pattern */
+                    else {
+                        /* Compute offset in file */
+                        /* Before simplification */
+                        /* mpi_offset=mpi_file_offset+(nbytes_xfer/(buf_size/blk_size)
+                            *pio_mpi_nprocs_g)/(snbytes/blk_size*(blk_size*blk_size))*
+                            (buf_size/blk_size*snbytes/blk_size*(blk_size*blk_size))+
+                            ((nbytes_xfer/(buf_size/blk_size))*pio_mpi_nprocs_g)%(snbytes
+                            /blk_size*(blk_size*blk_size)); */
+                        mpi_offset=mpi_file_offset+((nbytes_xfer/(buf_size/blk_size)
+                            *pio_mpi_nprocs_g)/(snbytes*blk_size))*(buf_size*snbytes)
+                            +((nbytes_xfer/(buf_size/blk_size))*pio_mpi_nprocs_g)%(snbytes*blk_size);
+
+                        /* Number of bytes to be transferred per I/O operation */
+                        nbytes_xfer_advance = blk_size * blk_size;
+
+                        /* Global offset advance after each I/O operation */
+                        /* mpi_offset_advance = (MPI_Offset)(snbytes/blk_size*(blk_size*blk_size)); */
+                        mpi_offset_advance = (MPI_Offset)(snbytes*blk_size);
+
+                        /* MPI type to be used for collective access */
+                        mpi_collective_type = mpi_chunk_inter_type;
+                    } /* end else */
+                } /* end else */
+
+                /* Common code for independent file access */
+                if (!parms->collective) {
+                    /* Set the base of user's buffer */
+                    buf_p = (unsigned char *)buffer;
+
+                    /* Set the number of bytes to transfer this time */
+                    nbytes_toxfer = buf_size * blk_size;
+
+                    /* Loop over portions of the buffer to read */
+                    while(nbytes_toxfer>0){
+                        /* Perform independent read */
+                        mrc = MPI_File_read_at(fd->mpifd, mpi_offset, buf_p,
+                            (int)nbytes_xfer_advance, MPI_BYTE, &mpi_status);
+                        VRFY((mrc==MPI_SUCCESS), "MPIO_READ");
+
+                        /* Advance location in buffer */
+                        buf_p+=nbytes_xfer_advance;
+
+                        /* Advance global offset in dataset */
+                        nbytes_xfer+=nbytes_xfer_advance;
+
+                        /* Decrement number of bytes left this time */
+                        nbytes_toxfer-=nbytes_xfer_advance;
+
+                        /* Partially advance global offset in dataset */
+                        mpi_offset+=mpi_offset_advance;
+                    } /* end while */
+                } /* end if */
+
+                /* Common code for collective file access */
+                else {
+                    /* Set the file view */
+                    mrc = MPI_File_set_view(fd->mpifd, mpi_offset, MPI_BYTE,
+                        mpi_collective_type, (char *)"native", h5_io_info_g);
+                    VRFY((mrc==MPI_SUCCESS), "MPIO_VIEW");
+
+                    /* Perform read */
+                    MPI_File_read_at_all(fd->mpifd, 0, buffer,(int)(buf_size*blk_size),
+                        MPI_BYTE, &mpi_status);
+                    VRFY((mrc==MPI_SUCCESS), "MPIO_READ");
+
+                    /* Advance global offset in dataset */
+                    nbytes_xfer+=buf_size*blk_size;
+                } /* end else */
+
+            } /* end else */
+            break;
+
+        case PHDF5:
+            /* 1D dataspace */
+            if (!parms->dim2d){
+            /* Set up the file dset space id to move the selection to process */
+            if (!parms->interleaved){
+                /* Contiguous pattern */
+                h5offset[0] = nbytes_xfer;
+            } /* end if */
+            else {
+                /* Interleaved access pattern */
+                /* Skip offset over blocks of other processes */
+                h5offset[0] = (nbytes_xfer*pio_mpi_nprocs_g);
+            } /* end else */
+            hrc = H5Soffset_simple(h5dset_space_id, h5offset);
+            VRFY((hrc >= 0), "H5Soffset_simple");
+
+            /* Read the buffer in */
+            hrc = H5Dread(h5ds_id, ELMT_H5_TYPE, h5mem_space_id,
+                h5dset_space_id, h5dxpl, buffer);
+            VRFY((hrc >= 0), "H5Dread");
+
+            /* Increment number of bytes transferred */
+            nbytes_xfer += buf_size;
+            } /* end if */
+            /* 2D dataspace */
+            else {
+            /* Set up the file dset space id to move the selection to process */
+            if (!parms->interleaved){
+                /* Contiguous pattern */
+                h5offset[0] = (nbytes_xfer/(snbytes*blk_size))*blk_size;
+                h5offset[1] = (nbytes_xfer%(snbytes*blk_size))/blk_size;
+            } /* end if */
+            else {
+                /* Interleaved access pattern */
+                /* Skip offset over blocks of other processes */
+                h5offset[0] = ((nbytes_xfer*pio_mpi_nprocs_g)/(snbytes*buf_size))*buf_size;
+                h5offset[1] = ((nbytes_xfer*pio_mpi_nprocs_g)%(snbytes*buf_size))/buf_size;
+
+            } /* end else */
+            hrc = H5Soffset_simple(h5dset_space_id, h5offset);
+            VRFY((hrc >= 0), "H5Soffset_simple");
+
+            /* Write the buffer out */
+            hrc = H5Dread(h5ds_id, ELMT_H5_TYPE, h5mem_space_id,
+                h5dset_space_id, h5dxpl, buffer);
+            VRFY((hrc >= 0), "H5Dread");
+
+            /* Increment number of bytes transferred */
+            nbytes_xfer += buf_size*blk_size;
+
+            } /* end else */
+            break;
+        } /* switch (parms->io_type) */
+
+        /* Verify raw data, if asked */
+        if (parms->verify) {
+        /* Verify data read */
+        unsigned char *ucharptr = (unsigned char *)buffer;
+        size_t i;
+        int nerror=0;
+
+        for (i = 0; i < bsize; ++i){
+            if (*ucharptr++ != pio_mpi_rank_g+1) {
+            if (++nerror < 20){
+                /* report at most 20 errors */
+                HDprint_rank(output);
+                HDfprintf(output, "read data error, expected (%d), "
+                    "got (%d)\n",
+                    pio_mpi_rank_g+1,
+                    (int)*(ucharptr-1));
+            } /* end if */
+            } /* end if */
+        } /* end for */
+        if (nerror >= 20) {
+            HDprint_rank(output);
+            HDfprintf(output, "...");
+            HDfprintf(output, "total read data errors=%d\n",
+                nerror);
+        } /* end if */
+        }   /* if (parms->verify) */
+
+    } /* end while */
+
+    /* Stop "raw data" read timer */
+    set_time(res->timers, HDF5_RAW_READ_FIXED_DIMS, TSTOP);
+
+    /* Calculate read time */
+
+    /* Close dataset. Only HDF5 needs to do an explicit close. */
+    if (parms->io_type == PHDF5) {
+        hrc = H5Dclose(h5ds_id);
+
+        if (hrc < 0) {
+        fprintf(stderr, "HDF5 Dataset Close failed\n");
+        GOTOERROR(FAIL);
+        }
+
+        h5ds_id = -1;
+    } /* end if */
+    } /* end for */
+
+done:
+    /* release MPI-I/O objects */
+    if (parms->io_type == MPIO) {
+        /* 1D dataspace */
+        if (!parms->dim2d){
+            /* Free file type */
+            mrc = MPI_Type_free( &mpi_file_type );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free buffer type */
+            mrc = MPI_Type_free( &mpi_blk_type );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+        } /* end if */
+        /* 2D dataspace */
+        else {
+            /* Free partial buffer type for contiguous access */
+            mrc = MPI_Type_free( &mpi_partial_buffer_cont );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free contiguous file type */
+            mrc = MPI_Type_free( &mpi_cont_type );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free partial buffer type for interleaved access */
+            mrc = MPI_Type_free( &mpi_partial_buffer_inter );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free interleaved file type */
+            mrc = MPI_Type_free( &mpi_inter_type );
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free full buffer type */
+            mrc = MPI_Type_free(&mpi_full_buffer);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free full chunk type */
+            mrc = MPI_Type_free(&mpi_full_chunk);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+
+            /* Free chunk interleaved file type */
+            mrc = MPI_Type_free(&mpi_chunk_inter_type);
+            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_FREE");
+        } /* end else */
+    } /* end if */
+
+    /* release HDF5 objects */
+    if (h5dset_space_id != -1) {
+    hrc = H5Sclose(h5dset_space_id);
+    if (hrc < 0){
+        fprintf(stderr, "HDF5 Dataset Space Close failed\n");
+        ret_code = FAIL;
+    } else {
+        h5dset_space_id = -1;
+    }
+    }
+
+    if (h5mem_space_id != -1) {
+    hrc = H5Sclose(h5mem_space_id);
+    if (hrc < 0) {
+        fprintf(stderr, "HDF5 Memory Space Close failed\n");
+        ret_code = FAIL;
+    } else {
+        h5mem_space_id = -1;
+    }
+    }
+
+    if (h5dxpl != -1) {
+    hrc = H5Pclose(h5dxpl);
+    if (hrc < 0) {
+        fprintf(stderr, "HDF5 Dataset Transfer Property List Close failed\n");
+        ret_code = FAIL;
+    } else {
+        h5dxpl = -1;
+    }
+    }
+
+    return ret_code;
+}
+
+/*
+ * Function:    do_fopen
+ * Purpose:     Open the specified file.
+ * Return:      SUCCESS or FAIL
+ * Programmer:  Albert Cheng, Bill Wendling, 2001/12/13
+ * Modifications:
+ */
+    static herr_t
+do_fopen(parameters *param, char *fname, file_descr *fd /*out*/, int flags)
+{
+    int ret_code = SUCCESS, mrc;
+    hid_t acc_tpl = -1;         /* file access templates */
+
+    switch (param->io_type) {
+        case POSIXIO:
+            if (flags & (PIO_CREATE | PIO_WRITE))
+                fd->posixfd = POSIXCREATE(fname);
+            else
+                fd->posixfd = POSIXOPEN(fname, O_RDONLY);
+
+            if (fd->posixfd < 0 ) {
+                fprintf(stderr, "POSIX File Open failed(%s)\n", fname);
+                GOTOERROR(FAIL);
+            }
+
+
+            /* The perils of POSIX I/O in a parallel environment. The problem is:
+             *
+             *      - Process n opens a file with truncation and then starts
+             *        writing to the file.
+             *      - Process m also opens the file with truncation, but after
+             *        process n has already started to write to the file. Thus,
+             *        all of the stuff process n wrote is now lost.
+             */
+            MPI_Barrier(pio_comm_g);
+
+            break;
+
+        case MPIO:
+            if (flags & (PIO_CREATE | PIO_WRITE)) {
+                MPI_File_delete(fname, h5_io_info_g);
+                mrc = MPI_File_open(pio_comm_g, fname, MPI_MODE_CREATE | MPI_MODE_RDWR,
+                    h5_io_info_g, &fd->mpifd);
+
+                if (mrc != MPI_SUCCESS) {
+                    fprintf(stderr, "MPI File Open failed(%s)\n", fname);
+                    GOTOERROR(FAIL);
+                }
+
+                /*since MPI_File_open with MPI_MODE_CREATE does not truncate  */
+                /*filesize , set size to 0 explicitedly.    */
+                mrc = MPI_File_set_size(fd->mpifd, (MPI_Offset)0);
+                if (mrc != MPI_SUCCESS) {
+                    fprintf(stderr, "MPI_File_set_size failed\n");
+                    GOTOERROR(FAIL);
+                }
+            } else {
+                mrc = MPI_File_open(pio_comm_g, fname, MPI_MODE_RDONLY, h5_io_info_g, &fd->mpifd);
+                if (mrc != MPI_SUCCESS) {
+                    fprintf(stderr, "MPI File Open failed(%s)\n", fname);
+                    GOTOERROR(FAIL);
+                }
+            }
+
+            break;
+
+        case PHDF5:
+            if ((acc_tpl = H5Pcreate(H5P_FILE_ACCESS)) < 0) {
+                fprintf(stderr, "HDF5 Property List Create failed\n");
+                GOTOERROR(FAIL);
+            }
+
+            /* Set the file driver to the MPI-IO driver */
+            if (H5Pset_fapl_mpio(acc_tpl, pio_comm_g, h5_io_info_g) < 0) {
+                fprintf(stderr, "HDF5 Property List Set failed\n");
+                GOTOERROR(FAIL);
+            }
+
+            /* Set the alignment of objects in HDF5 file */
+            if (H5Pset_alignment(acc_tpl, param->h5_thresh, param->h5_align) < 0) {
+                fprintf(stderr, "HDF5 Property List Set failed\n");
+                GOTOERROR(FAIL);
+            }
+
+            /* create the parallel file */
+            if (flags & (PIO_CREATE | PIO_WRITE))
+                fd->h5fd = H5Fcreate(fname, H5F_ACC_TRUNC, H5P_DEFAULT, acc_tpl);
+            else
+                fd->h5fd = H5Fopen(fname, H5F_ACC_RDONLY, acc_tpl);
+            if (fd->h5fd < 0) {
+                fprintf(stderr, "HDF5 File Create failed(%s)\n", fname);
+                GOTOERROR(FAIL);
+            }
+
+            /* verifying the close of the acc_tpl */
+            if (H5Pclose(acc_tpl) < 0) {
+                fprintf(stderr, "HDF5 Property List Close failed\n");
+                GOTOERROR(FAIL);
+            }
+
+            break;
+    }
+
+done:
+    return ret_code;
+}
+
+/*
+ * Function:    do_fclose
+ * Purpose:     Close the specified file descriptor.
+ * Return:      SUCCESS or FAIL
+ * Programmer:  Albert Cheng, Bill Wendling, 2001/12/13
+ * Modifications:
+ */
+    static herr_t
+do_fclose(iotype iot, file_descr *fd /*out*/)
+{
+    herr_t ret_code = SUCCESS, hrc;
+    int mrc = 0, rc = 0;
+
+    switch (iot) {
+    case POSIXIO:
+        rc = POSIXCLOSE(fd->posixfd);
+
+        if (rc != 0){
+        fprintf(stderr, "POSIX File Close failed\n");
+        GOTOERROR(FAIL);
+        }
+
+        fd->posixfd = -1;
+        break;
+
+    case MPIO:
+        mrc = MPI_File_close(&fd->mpifd);
+
+        if (mrc != MPI_SUCCESS){
+        fprintf(stderr, "MPI File close failed\n");
+        GOTOERROR(FAIL);
+        }
+
+        fd->mpifd = MPI_FILE_NULL;
+        break;
+
+    case PHDF5:
+        hrc = H5Fclose(fd->h5fd);
+
+        if (hrc < 0) {
+        fprintf(stderr, "HDF5 File Close failed\n");
+        GOTOERROR(FAIL);
+        }
+
+        fd->h5fd = -1;
+        break;
+    }
+
+done:
+    return ret_code;
+}
+
+
+/*
+ * Function:    do_fclose
+ * Purpose:     Cleanup temporary file unless HDF5_NOCLEANUP is set.
+ *      Only Proc 0 of the PIO communicator will do the cleanup.
+ *      Other processes just return.
+ * Return:      void
+ * Programmer:  Albert Cheng 2001/12/12
+ * Modifications:
+ */
+    static void
+do_cleanupfile(iotype iot, char *fname)
+{
+    if (pio_mpi_rank_g != 0)
+    return;
+
+    if (clean_file_g == -1)
+    clean_file_g = (getenv("HDF5_NOCLEANUP")==NULL) ? 1 : 0;
+
+    if (clean_file_g){
+    switch (iot){
+        case POSIXIO:
+        remove(fname);
+        break;
+        case MPIO:
+        case PHDF5:
+        MPI_File_delete(fname, h5_io_info_g);
+        break;
+    }
+    }
+}
+
+#ifdef TIME_MPI
+/* instrument the MPI_File_wrirte_xxx and read_xxx calls to measure
+ * pure time spent in MPI_File code.
+ */
+int MPI_File_read_at(MPI_File fh, MPI_Offset offset, void *buf,
+    int count, MPI_Datatype datatype, MPI_Status *status)
+{
+    int err;
+    set_time(timer_g, HDF5_MPI_READ, TSTART);
+    err=PMPI_File_read_at(fh, offset, buf, count, datatype, status);
+    set_time(timer_g, HDF5_MPI_READ, TSTOP);
+    return err;
+}
+
+
+int MPI_File_read_at_all(MPI_File fh, MPI_Offset offset, void *buf,
+    int count, MPI_Datatype datatype, MPI_Status *status)
+{
+    int err;
+    set_time(timer_g, HDF5_MPI_READ, TSTART);
+    err=PMPI_File_read_at_all(fh, offset, buf, count, datatype, status);
+    set_time(timer_g, HDF5_MPI_READ, TSTOP);
+    return err;
+}
+
+int MPI_File_write_at(MPI_File fh, MPI_Offset offset, void *buf,
+    int count, MPI_Datatype datatype, MPI_Status *status)
+{
+    int err;
+    set_time(timer_g, HDF5_MPI_WRITE, TSTART);
+    err=PMPI_File_write_at(fh, offset, buf, count, datatype, status);
+    set_time(timer_g, HDF5_MPI_WRITE, TSTOP);
+    return err;
+}
+
+int MPI_File_write_at_all(MPI_File fh, MPI_Offset offset, void *buf,
+    int count, MPI_Datatype datatype, MPI_Status *status)
+{
+    int err;
+    set_time(timer_g, HDF5_MPI_WRITE, TSTART);
+    err=PMPI_File_write_at_all(fh, offset, buf, count, datatype, status);
+    set_time(timer_g, HDF5_MPI_WRITE, TSTOP);
+    return err;
+}
+
+#endif  /* TIME_MPI */
+#endif /* H5_HAVE_PARALLEL */
+
+
+
+
+
diff --git a/tools/perform/pio_perf.c b/tools/perform/pio_perf.c
new file mode 100644
index 0000000..cf41cbe
--- /dev/null
+++ b/tools/perform/pio_perf.c
@@ -0,0 +1,1696 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Parallel HDF5 Performance Testing Code
+ * --------------------------------------
+ *
+ * Portable code to test performance on the different platforms we support.
+ * This is what the report should look like:
+ *
+ *  nprocs = Max#Procs
+ *      IO API = POSIXIO
+ *          # Files = 1, # of dsets = 1000, Elements per dset = 37000
+ *              Write Results = x MB/s
+ *              Read Results = x MB/s
+ *          # Files = 1, # of dsets = 3000, Elements per dset = 37000
+ *              Write Results = x MB/s
+ *              Read Results = x MB/s
+ *
+ *          . . .
+ *
+ *      IO API = MPIO
+ *          # Files = 1, # of dsets = 1000, Elements per dset = 37000
+ *              Write Results = x MB/s
+ *              Read Results = x MB/s
+ *          # Files = 1, # of dsets = 3000, Elements per dset = 37000
+ *              Write Results = x MB/s
+ *              Read Results = x MB/s
+ *
+ *          . . .
+ *
+ *      IO API = PHDF5
+ *          # Files = 1, # of dsets = 1000, Elements per dset = 37000
+ *              Write Results = x MB/s
+ *              Read Results = x MB/s
+ *          # Files = 1, # of dsets = 3000, Elements per dset = 37000
+ *              Write Results = x MB/s
+ *              Read Results = x MB/s
+ *
+ *          . . .
+ *
+ *  nprocs = Max#Procs / 2
+ *
+ *      . . .
+ *
+ */
+
+/* system header files */
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "hdf5.h"
+
+#ifdef H5_HAVE_PARALLEL
+
+/* library header files */
+#include <mpi.h>
+
+/* our header files */
+#include "pio_perf.h"
+
+/* useful macros */
+#define TAB_SPACE           4
+
+#define ONE_KB              1024
+#define ONE_MB              (ONE_KB * ONE_KB)
+#define ONE_GB              (ONE_MB * ONE_KB)
+
+#define PIO_POSIX           0x1
+#define PIO_MPI             0x2
+#define PIO_HDF5            0x4
+
+/* report 0.0 in case t is zero too */
+#define MB_PER_SEC(bytes,t) (((t)==0.0) ? 0.0 : ((((double)bytes) / ONE_MB) / (t)))
+
+#ifndef TRUE
+#define TRUE    1
+#endif  /* TRUE */
+#ifndef FALSE
+#define FALSE   (!TRUE)
+#endif  /* FALSE */
+
+/* global variables */
+FILE       *output;             /* output file                          */
+int         comm_world_rank_g;  /* my rank in MPI_COMM_RANK             */
+int         comm_world_nprocs_g;/* num. of processes of MPI_COMM_WORLD  */
+MPI_Comm    pio_comm_g;         /* Communicator to run the PIO          */
+int         pio_mpi_rank_g;     /* MPI rank of pio_comm_g               */
+int         pio_mpi_nprocs_g;   /* Number of processes of pio_comm_g    */
+int         pio_debug_level = 0;/* The debug level:
+                                 *   0 - Off
+                                 *   1 - Minimal
+                                 *   2 - Some more
+                                 *   3 - Maximal
+                                 *   4 - Maximal & then some
+                                 */
+
+/* local variables */
+static const char  *progname = "h5perf";
+
+/*
+ * Command-line options: The user can specify short or long-named
+ * parameters. The long-named ones can be partially spelled. When
+ * adding more, make sure that they don't clash with each other.
+ */
+#if 1
+static const char *s_opts = "a:A:B:cCd:D:e:F:ghi:Imno:p:P:stT:wx:X:";
+#else
+static const char *s_opts = "a:A:bB:cCd:D:e:F:ghi:Imno:p:P:stT:wx:X:";
+#endif  /* 1 */
+static struct long_options l_opts[] = {
+    { "align", require_arg, 'a' },
+    { "alig", require_arg, 'a' },
+    { "ali", require_arg, 'a' },
+    { "al", require_arg, 'a' },
+    { "api", require_arg, 'A' },
+    { "ap", require_arg, 'A' },
+#if 0
+    /* a sighting of the elusive binary option */
+    { "binary", no_arg, 'b' },
+    { "binar", no_arg, 'b' },
+    { "bina", no_arg, 'b' },
+    { "bin", no_arg, 'b' },
+    { "bi", no_arg, 'b' },
+#endif  /* 0 */
+    { "block-size", require_arg, 'B' },
+    { "block-siz", require_arg, 'B' },
+    { "block-si", require_arg, 'B' },
+    { "block-s", require_arg, 'B' },
+    { "block-", require_arg, 'B' },
+    { "block", require_arg, 'B' },
+    { "bloc", require_arg, 'B' },
+    { "blo", require_arg, 'B' },
+    { "bl", require_arg, 'B' },
+    { "chunk", no_arg, 'c' },
+    { "chun", no_arg, 'c' },
+    { "chu", no_arg, 'c' },
+    { "ch", no_arg, 'c' },
+    { "collective", no_arg, 'C' },
+    { "collectiv", no_arg, 'C' },
+    { "collecti", no_arg, 'C' },
+    { "collect", no_arg, 'C' },
+    { "collec", no_arg, 'C' },
+    { "colle", no_arg, 'C' },
+    { "coll", no_arg, 'C' },
+    { "col", no_arg, 'C' },
+    { "co", no_arg, 'C' },
+    { "debug", require_arg, 'D' },
+    { "debu", require_arg, 'D' },
+    { "deb", require_arg, 'D' },
+    { "de", require_arg, 'D' },
+    { "geometry", no_arg, 'g' },
+    { "geometr", no_arg, 'g' },
+    { "geomet", no_arg, 'g' },
+    { "geome", no_arg, 'g' },
+    { "geom", no_arg, 'g' },
+    { "geo", no_arg, 'g' },
+    { "ge", no_arg, 'g' },
+    { "help", no_arg, 'h' },
+    { "hel", no_arg, 'h' },
+    { "he", no_arg, 'h' },
+    { "interleaved", require_arg, 'I' },
+    { "interleave", require_arg, 'I' },
+    { "interleav", require_arg, 'I' },
+    { "interlea", require_arg, 'I' },
+    { "interle", require_arg, 'I' },
+    { "interl", require_arg, 'I' },
+    { "inter", require_arg, 'I' },
+    { "inte", require_arg, 'I' },
+    { "int", require_arg, 'I' },
+    { "in", require_arg, 'I' },
+    { "max-num-processes", require_arg, 'P' },
+    { "max-num-processe", require_arg, 'P' },
+    { "max-num-process", require_arg, 'P' },
+    { "max-num-proces", require_arg, 'P' },
+    { "max-num-proce", require_arg, 'P' },
+    { "max-num-proc", require_arg, 'P' },
+    { "max-num-pro", require_arg, 'P' },
+    { "max-num-pr", require_arg, 'P' },
+    { "max-num-p", require_arg, 'P' },
+    { "min-num-processes", require_arg, 'p' },
+    { "min-num-processe", require_arg, 'p' },
+    { "min-num-process", require_arg, 'p' },
+    { "min-num-proces", require_arg, 'p' },
+    { "min-num-proce", require_arg, 'p' },
+    { "min-num-proc", require_arg, 'p' },
+    { "min-num-pro", require_arg, 'p' },
+    { "min-num-pr", require_arg, 'p' },
+    { "min-num-p", require_arg, 'p' },
+    { "max-xfer-size", require_arg, 'X' },
+    { "max-xfer-siz", require_arg, 'X' },
+    { "max-xfer-si", require_arg, 'X' },
+    { "max-xfer-s", require_arg, 'X' },
+    { "max-xfer", require_arg, 'X' },
+    { "max-xfe", require_arg, 'X' },
+    { "max-xf", require_arg, 'X' },
+    { "max-x", require_arg, 'X' },
+    { "min-xfer-size", require_arg, 'x' },
+    { "min-xfer-siz", require_arg, 'x' },
+    { "min-xfer-si", require_arg, 'x' },
+    { "min-xfer-s", require_arg, 'x' },
+    { "min-xfer", require_arg, 'x' },
+    { "min-xfe", require_arg, 'x' },
+    { "min-xf", require_arg, 'x' },
+    { "min-x", require_arg, 'x' },
+    { "num-bytes", require_arg, 'e' },
+    { "num-byte", require_arg, 'e' },
+    { "num-byt", require_arg, 'e' },
+    { "num-by", require_arg, 'e' },
+    { "num-b", require_arg, 'e' },
+    { "num-dsets", require_arg, 'd' },
+    { "num-dset", require_arg, 'd' },
+    { "num-dse", require_arg, 'd' },
+    { "num-ds", require_arg, 'd' },
+    { "num-d", require_arg, 'd' },
+    { "num-files", require_arg, 'F' },
+    { "num-file", require_arg, 'F' },
+    { "num-fil", require_arg, 'F' },
+    { "num-fi", require_arg, 'F' },
+    { "num-f", require_arg, 'F' },
+    { "num-iterations", require_arg, 'i' },
+    { "num-iteration", require_arg, 'i' },
+    { "num-iteratio", require_arg, 'i' },
+    { "num-iterati", require_arg, 'i' },
+    { "num-iterat", require_arg, 'i' },
+    { "num-itera", require_arg, 'i' },
+    { "num-iter", require_arg, 'i' },
+    { "num-ite", require_arg, 'i' },
+    { "num-it", require_arg, 'i' },
+    { "num-i", require_arg, 'i' },
+    { "output", require_arg, 'o' },
+    { "outpu", require_arg, 'o' },
+    { "outp", require_arg, 'o' },
+    { "out", require_arg, 'o' },
+    { "ou", require_arg, 'o' },
+    { "threshold", require_arg, 'T' },
+    { "threshol", require_arg, 'T' },
+    { "thresho", require_arg, 'T' },
+    { "thresh", require_arg, 'T' },
+    { "thres", require_arg, 'T' },
+    { "thre", require_arg, 'T' },
+    { "thr", require_arg, 'T' },
+    { "th", require_arg, 'T' },
+    { "write-only", require_arg, 'w' },
+    { "write-onl", require_arg, 'w' },
+    { "write-on", require_arg, 'w' },
+    { "write-o", require_arg, 'w' },
+    { "write", require_arg, 'w' },
+    { "writ", require_arg, 'w' },
+    { "wri", require_arg, 'w' },
+    { "wr", require_arg, 'w' },
+    { NULL, 0, '\0' }
+};
+
+struct options {
+    long io_types;              /* bitmask of which I/O types to test   */
+    const char *output_file;    /* file to print report to              */
+    long num_dsets;             /* number of datasets                   */
+    long num_files;             /* number of files                      */
+    off_t num_bpp;              /* number of bytes per proc per dset    */
+    int num_iters;              /* number of iterations                 */
+    int max_num_procs;          /* maximum number of processes to use   */
+    int min_num_procs;          /* minimum number of processes to use   */
+    size_t max_xfer_size;       /* maximum transfer buffer size         */
+    size_t min_xfer_size;       /* minimum transfer buffer size         */
+    size_t blk_size;            /* Block size                           */
+    unsigned interleaved;       /* Interleaved vs. contiguous blocks    */
+    unsigned collective;        /* Collective vs. independent I/O       */
+    unsigned dim2d;             /* 1D vs. 2D geometry                   */
+    int print_times;       	/* print times as well as throughputs   */
+    int print_raw;         	/* print raw data throughput info       */
+    off_t h5_alignment;         /* alignment in HDF5 file               */
+    off_t h5_threshold;         /* threshold for alignment in HDF5 file */
+    int h5_use_chunks;     	/* Make HDF5 dataset chunked            */
+    int h5_write_only;        	/* Perform the write tests only         */
+    int verify;        		/* Verify data correctness              */
+};
+
+typedef struct _minmax {
+    double min;
+    double max;
+    double sum;
+    int num;
+} minmax;
+
+/* local functions */
+static off_t parse_size_directive(const char *size);
+static struct options *parse_command_line(int argc, char *argv[]);
+static void run_test_loop(struct options *options);
+static int run_test(iotype iot, parameters parms, struct options *opts);
+static void output_all_info(minmax *mm, int count, int indent_level);
+static void get_minmax(minmax *mm, double val);
+static minmax accumulate_minmax_stuff(minmax *mm, int count);
+static int create_comm_world(int num_procs, int *doing_pio);
+static int destroy_comm_world(void);
+static void output_results(const struct options *options, const char *name,
+                           minmax *table, int table_size, off_t data_size);
+static void output_times(const struct options *options, const char *name,
+                           minmax *table, int table_size);
+static void output_report(const char *fmt, ...);
+static void print_indent(register int indent);
+static void usage(const char *prog);
+static void report_parameters(struct options *opts);
+
+/*
+ * Function:    main
+ * Purpose:     Start things up. Initialize MPI and then call the test looping
+ *              function.
+ * Return:      EXIT_SUCCESS or EXIT_FAILURE
+ * Programmer:  Bill Wendling, 30. October 2001
+ * Modifications:
+ */
+int
+main(int argc, char **argv)
+{
+    int ret;
+    int exit_value = EXIT_SUCCESS;
+    struct options *opts = NULL;
+
+#ifndef STANDALONE
+    /* Initialize h5tools lib */
+    h5tools_init();
+#endif
+
+    output = stdout;
+
+    /* initialize MPI and get the maximum num of processors we started with */
+    MPI_Init(&argc, &argv);
+    ret = MPI_Comm_size(MPI_COMM_WORLD, &comm_world_nprocs_g);
+
+    if (ret != MPI_SUCCESS) {
+        fprintf(stderr, "%s: MPI_Comm_size call failed\n", progname);
+
+        if (ret == MPI_ERR_COMM)
+            fprintf(stderr, "invalid MPI communicator\n");
+        else
+            fprintf(stderr, "invalid argument\n");
+
+        exit_value = EXIT_FAILURE;
+        goto finish;
+    }
+
+    ret = MPI_Comm_rank(MPI_COMM_WORLD, &comm_world_rank_g);
+
+    if (ret != MPI_SUCCESS) {
+        fprintf(stderr, "%s: MPI_Comm_rank call failed\n", progname);
+
+        if (ret == MPI_ERR_COMM)
+            fprintf(stderr, "invalid MPI communicator\n");
+        else
+            fprintf(stderr, "invalid argument\n");
+
+        exit_value = EXIT_FAILURE;
+        goto finish;
+    }
+
+    pio_comm_g = MPI_COMM_WORLD;
+
+    h5_set_info_object();
+    opts = parse_command_line(argc, argv);
+
+    if (!opts) {
+        exit_value = EXIT_FAILURE;
+        goto finish;
+    }
+
+    if (opts->output_file) {
+        if ((output = fopen(opts->output_file, "w")) == NULL) {
+            fprintf(stderr, "%s: cannot open output file\n", progname);
+            perror(opts->output_file);
+            goto finish;
+        }
+    }
+
+    if ((pio_debug_level == 0 && comm_world_rank_g == 0) || pio_debug_level > 0)
+        report_parameters(opts);
+
+    run_test_loop(opts);
+
+finish:
+    MPI_Finalize();
+    free(opts);
+    return exit_value;
+}
+
+/*
+ * Function:    run_test_loop
+ * Purpose:     Run the I/O tests. Write the results to OUTPUT.
+ *
+ *            - The slowest changing part of the test is the number of
+ *              processors to use. For each loop iteration, we divide that
+ *              number by 2 and rerun the test.
+ *
+ *            - The second slowest is what type of IO API to perform. We have
+ *              three choices: POSIXIO, MPI-IO, and PHDF5.
+ *
+ *            - Then we change the size of the buffer. This information is
+ *              inferred from the number of datasets to create and the number
+ *              of integers to put into each dataset. The backend code figures
+ *              this out.
+ *
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 30. October 2001
+ * Modifications:
+ *    Added 2D testing (Christian Chilan, 10. August 2005)
+ */
+static void
+run_test_loop(struct options *opts)
+{
+    parameters parms;
+    int num_procs;
+    int doing_pio;      /* if this process is doing PIO */
+
+    parms.num_files = opts->num_files;
+    parms.num_dsets = opts->num_dsets;
+    parms.num_iters = opts->num_iters;
+    parms.blk_size = opts->blk_size;
+    parms.interleaved = opts->interleaved;
+    parms.collective = opts->collective;
+    parms.dim2d = opts->dim2d;
+    parms.h5_align = opts->h5_alignment;
+    parms.h5_thresh = opts->h5_threshold;
+    parms.h5_use_chunks = opts->h5_use_chunks;
+    parms.h5_write_only = opts->h5_write_only;
+    parms.verify = opts->verify;
+
+    /* start with max_num_procs and decrement it by half for each loop. */
+    /* if performance needs restart, fewer processes may be needed. */
+    for (num_procs = opts->max_num_procs;
+            num_procs >= opts->min_num_procs; num_procs >>= 1) {
+        register size_t buf_size;
+
+        parms.num_procs = num_procs;
+
+        if (create_comm_world(parms.num_procs, &doing_pio) != SUCCESS) {
+            /* do something harsh */
+        }
+
+    /* only processes doing PIO will run the tests */
+    if (doing_pio){
+            output_report("Number of processors = %ld\n", parms.num_procs);
+
+            /* multiply the xfer buffer size by 2 for each loop iteration */
+            for (buf_size = opts->min_xfer_size;
+                    buf_size <= opts->max_xfer_size; buf_size <<= 1) {
+                parms.buf_size = buf_size;
+
+        if (parms.dim2d){
+            parms.num_bytes = (off_t)pow((double)(opts->num_bpp*parms.num_procs),2);
+            if (parms.interleaved)
+            output_report("Transfer Buffer Size: %ldx%ld bytes, File size: %.2f MBs\n",
+                buf_size, opts->blk_size,
+                ((double)parms.num_dsets * (double)parms.num_bytes)
+                / ONE_MB);
+            else
+            output_report("Transfer Buffer Size: %ldx%ld bytes, File size: %.2f MBs\n",
+                opts->blk_size, buf_size,
+                ((double)parms.num_dsets * (double)parms.num_bytes)
+                / ONE_MB);
+
+            print_indent(1);
+            output_report("  # of files: %ld, # of datasets: %ld, dataset size: %.2fx%.2f KBs\n",
+                parms.num_files, parms.num_dsets, (double)(opts->num_bpp*parms.num_procs)/ONE_KB,
+                (double)(opts->num_bpp*parms.num_procs)/ONE_KB);
+        }
+        else{
+            parms.num_bytes = (off_t)opts->num_bpp*parms.num_procs;
+            output_report("Transfer Buffer Size: %ld bytes, File size: %.2f MBs\n",
+                buf_size,((double)parms.num_dsets * (double)parms.num_bytes) / ONE_MB);
+
+            print_indent(1);
+            output_report("  # of files: %ld, # of datasets: %ld, dataset size: %.2f MBs\n",
+                parms.num_files, parms.num_dsets, (double)(opts->num_bpp*parms.num_procs)/ONE_MB);
+        }
+
+                if (opts->io_types & PIO_POSIX)
+                    run_test(POSIXIO, parms, opts);
+
+                if (opts->io_types & PIO_MPI)
+                    run_test(MPIO, parms, opts);
+
+                if (opts->io_types & PIO_HDF5)
+                    run_test(PHDF5, parms, opts);
+
+                /* Run the tests once if buf_size==0, but then break out */
+                if(buf_size==0)
+                    break;
+            }
+
+            if (destroy_comm_world() != SUCCESS) {
+                /* do something harsh */
+            }
+    }
+    }
+}
+
+/*
+ * Function:    run_test
+ * Purpose:     Inner loop call to actually run the I/O test.
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 18. December 2001
+ * Modifications:
+ */
+static int
+run_test(iotype iot, parameters parms, struct options *opts)
+{
+    results         res;
+    register int    i, ret_value = SUCCESS;
+    int             comm_size;
+    off_t           raw_size;
+    minmax         *write_mpi_mm_table=NULL;
+    minmax         *write_mm_table=NULL;
+    minmax         *write_gross_mm_table=NULL;
+    minmax         *write_raw_mm_table=NULL;
+    minmax         *read_mpi_mm_table=NULL;
+    minmax         *read_mm_table=NULL;
+    minmax         *read_gross_mm_table=NULL;
+    minmax         *read_raw_mm_table=NULL;
+    minmax         *read_open_mm_table=NULL;
+    minmax         *read_close_mm_table=NULL;
+    minmax         *write_open_mm_table=NULL;
+    minmax         *write_close_mm_table=NULL;
+    minmax          write_mpi_mm = {0.0, 0.0, 0.0, 0};
+    minmax          write_mm = {0.0, 0.0, 0.0, 0};
+    minmax          write_gross_mm = {0.0, 0.0, 0.0, 0};
+    minmax          write_raw_mm = {0.0, 0.0, 0.0, 0};
+    minmax          read_mpi_mm = {0.0, 0.0, 0.0, 0};
+    minmax          read_mm = {0.0, 0.0, 0.0, 0};
+    minmax          read_gross_mm = {0.0, 0.0, 0.0, 0};
+    minmax          read_raw_mm = {0.0, 0.0, 0.0, 0};
+    minmax          read_open_mm = {0.0, 0.0, 0.0, 0};
+    minmax          read_close_mm = {0.0, 0.0, 0.0, 0};
+    minmax          write_open_mm = {0.0, 0.0, 0.0, 0};
+    minmax          write_close_mm = {0.0, 0.0, 0.0, 0};
+
+    raw_size = parms.num_files * (off_t)parms.num_dsets * (off_t)parms.num_bytes;
+    parms.io_type = iot;
+    print_indent(2);
+    output_report("IO API = ");
+
+    switch (iot) {
+        case POSIXIO:
+            output_report("POSIX\n");
+            break;
+        case MPIO:
+            output_report("MPIO\n");
+            break;
+        case PHDF5:
+            output_report("PHDF5 (w/MPI-IO driver)\n");
+            break;
+    }
+
+    MPI_Comm_size(pio_comm_g, &comm_size);
+
+    /* allocate space for tables minmax and that it is sufficient */
+    /* to initialize all elements to zeros by calloc.             */
+    write_mpi_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+    write_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+    write_gross_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+    write_raw_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+    write_open_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+    write_close_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+    if (!parms.h5_write_only) {
+        read_mpi_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+        read_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+        read_gross_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+        read_raw_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+        read_open_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+        read_close_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+    }
+
+    /* Do IO iteration times, collecting statistics each time */
+    for (i = 0; i < parms.num_iters; ++i) {
+        double t;
+
+        MPI_Barrier(pio_comm_g);
+        res = do_pio(parms);
+
+        /* gather all of the "mpi write" times */
+        t = get_time(res.timers, HDF5_MPI_WRITE);
+        get_minmax(&write_mpi_mm, t);
+
+        write_mpi_mm_table[i] = write_mpi_mm;
+
+        /* gather all of the "write" times */
+        t = get_time(res.timers, HDF5_FINE_WRITE_FIXED_DIMS);
+        get_minmax(&write_mm, t);
+
+        write_mm_table[i] = write_mm;
+
+        /* gather all of the "write" times from open to close */
+        t = get_time(res.timers, HDF5_GROSS_WRITE_FIXED_DIMS);
+        get_minmax(&write_gross_mm, t);
+
+        write_gross_mm_table[i] = write_gross_mm;
+
+        /* gather all of the raw "write" times */
+        t = get_time(res.timers, HDF5_RAW_WRITE_FIXED_DIMS);
+        get_minmax(&write_raw_mm, t);
+
+        write_raw_mm_table[i] = write_raw_mm;
+
+        /* gather all of the file open times (time from open to first write) */
+        t = get_time(res.timers, HDF5_FILE_WRITE_OPEN);
+        get_minmax(&write_open_mm, t);
+
+        write_open_mm_table[i] = write_open_mm;
+
+        /* gather all of the file close times (time from last write to close) */
+        t = get_time(res.timers, HDF5_FILE_WRITE_CLOSE);
+        get_minmax(&write_close_mm, t);
+
+        write_close_mm_table[i] = write_close_mm;
+
+        if (!parms.h5_write_only) {
+            /* gather all of the "mpi read" times */
+            t = get_time(res.timers, HDF5_MPI_READ);
+            get_minmax(&read_mpi_mm, t);
+
+            read_mpi_mm_table[i] = read_mpi_mm;
+
+            /* gather all of the "read" times */
+            t = get_time(res.timers, HDF5_FINE_READ_FIXED_DIMS);
+            get_minmax(&read_mm, t);
+
+            read_mm_table[i] = read_mm;
+
+            /* gather all of the "read" times from open to close */
+            t = get_time(res.timers, HDF5_GROSS_READ_FIXED_DIMS);
+            get_minmax(&read_gross_mm, t);
+
+            read_gross_mm_table[i] = read_gross_mm;
+
+            /* gather all of the raw "read" times */
+            t = get_time(res.timers, HDF5_RAW_READ_FIXED_DIMS);
+            get_minmax(&read_raw_mm, t);
+
+            read_raw_mm_table[i] = read_raw_mm;
+
+            /* gather all of the file open times (time from open to first read) */
+            t = get_time(res.timers, HDF5_FILE_READ_OPEN);
+            get_minmax(&read_open_mm, t);
+
+            read_open_mm_table[i] = read_open_mm;
+
+            /* gather all of the file close times (time from last read to close) */
+            t = get_time(res.timers, HDF5_FILE_READ_CLOSE);
+            get_minmax(&read_close_mm, t);
+
+            read_close_mm_table[i] = read_close_mm;
+
+         }
+
+         pio_time_destroy(res.timers);
+    }
+
+    /*
+     * Show various statistics
+     */
+    /* Write statistics	*/
+    /* Print the raw data throughput if desired */
+    if (opts->print_raw) {
+        /* accumulate and output the max, min, and average "raw write" times */
+        if (pio_debug_level >= 3) {
+            /* output all of the times for all iterations */
+            print_indent(3);
+            output_report("Raw Data Write details:\n");
+            output_all_info(write_raw_mm_table, parms.num_iters, 4);
+        }
+
+        output_results(opts,"Raw Data Write",write_raw_mm_table,parms.num_iters,raw_size);
+    } /* end if */
+
+    /* show mpi write statics */
+    if (pio_debug_level >= 3) {
+        /* output all of the times for all iterations */
+        print_indent(3);
+        output_report("MPI Write details:\n");
+        output_all_info(write_mpi_mm_table, parms.num_iters, 4);
+    }
+
+    /* We don't currently output the MPI write results */
+
+    /* accumulate and output the max, min, and average "write" times */
+    if (pio_debug_level >= 3) {
+        /* output all of the times for all iterations */
+        print_indent(3);
+        output_report("Write details:\n");
+        output_all_info(write_mm_table, parms.num_iters, 4);
+    }
+
+    output_results(opts,"Write",write_mm_table,parms.num_iters,raw_size);
+
+    /* accumulate and output the max, min, and average "gross write" times */
+    if (pio_debug_level >= 3) {
+        /* output all of the times for all iterations */
+        print_indent(3);
+        output_report("Write Open-Close details:\n");
+        output_all_info(write_gross_mm_table, parms.num_iters, 4);
+    }
+
+    output_results(opts,"Write Open-Close",write_gross_mm_table,parms.num_iters,raw_size);
+
+    if (opts->print_times) {
+        output_times(opts,"Write File Open",write_open_mm_table,parms.num_iters);
+        output_times(opts,"Write File Close",write_close_mm_table,parms.num_iters);
+    }
+
+    /* Print out time from open to first write */
+    if (pio_debug_level >= 3) {
+       /* output all of the times for all iterations */
+       print_indent(3);
+       output_report("Write file open details:\n");
+       output_all_info(write_open_mm_table, parms.num_iters, 4);
+    }
+
+    /* Print out time from last write to close */
+    if (pio_debug_level >= 3) {
+       /* output all of the times for all iterations */
+       print_indent(3);
+       output_report("Write file close details:\n");
+       output_all_info(write_close_mm_table, parms.num_iters, 4);
+    }
+
+    if (!parms.h5_write_only) {
+        /* Read statistics	*/
+        /* Print the raw data throughput if desired */
+        if (opts->print_raw) {
+            /* accumulate and output the max, min, and average "raw read" times */
+            if (pio_debug_level >= 3) {
+                /* output all of the times for all iterations */
+                print_indent(3);
+                output_report("Raw Data Read details:\n");
+                output_all_info(read_raw_mm_table, parms.num_iters, 4);
+            }
+
+            output_results(opts, "Raw Data Read", read_raw_mm_table,
+                           parms.num_iters, raw_size);
+        } /* end if */
+
+        /* show mpi read statics */
+        if (pio_debug_level >= 3) {
+            /* output all of the times for all iterations */
+            print_indent(3);
+            output_report("MPI Read details:\n");
+            output_all_info(read_mpi_mm_table, parms.num_iters, 4);
+        }
+
+        /* We don't currently output the MPI read results */
+
+        /* accumulate and output the max, min, and average "read" times */
+        if (pio_debug_level >= 3) {
+            /* output all of the times for all iterations */
+            print_indent(3);
+            output_report("Read details:\n");
+            output_all_info(read_mm_table, parms.num_iters, 4);
+        }
+
+        output_results(opts, "Read", read_mm_table, parms.num_iters, raw_size);
+
+        /* accumulate and output the max, min, and average "gross read" times */
+        if (pio_debug_level >= 3) {
+            /* output all of the times for all iterations */
+            print_indent(3);
+            output_report("Read Open-Close details:\n");
+            output_all_info(read_gross_mm_table, parms.num_iters, 4);
+        }
+
+        output_results(opts, "Read Open-Close", read_gross_mm_table,parms.num_iters, raw_size);
+
+        if (opts->print_times) {
+            output_times(opts,"Read File Open",read_open_mm_table,parms.num_iters);
+            output_times(opts,"Read File Close",read_close_mm_table,parms.num_iters);
+        }
+
+        /* Print out time from open to first read */
+        if (pio_debug_level >= 3) {
+            /* output all of the times for all iterations */
+            print_indent(3);
+            output_report("Read file open details:\n");
+            output_all_info(read_open_mm_table, parms.num_iters, 4);
+        }
+
+        /* Print out time from last read to close */
+        if (pio_debug_level >= 3) {
+            /* output all of the times for all iterations */
+            print_indent(3);
+            output_report("Read file close details:\n");
+            output_all_info(read_close_mm_table, parms.num_iters, 4);
+        }
+
+    }
+
+    /* clean up our mess */
+    free(write_mpi_mm_table);
+    free(write_mm_table);
+    free(write_gross_mm_table);
+    free(write_raw_mm_table);
+    free(write_open_mm_table);
+    free(write_close_mm_table);
+
+    if (!parms.h5_write_only) {
+        free(read_mpi_mm_table);
+        free(read_mm_table);
+        free(read_gross_mm_table);
+        free(read_raw_mm_table);
+        free(read_open_mm_table);
+        free(read_close_mm_table);
+    }
+
+    return ret_value;
+}
+
+/*
+ * Function:    output_all_info
+ * Purpose:
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 29. January 2002
+ * Modifications:
+ */
+static void
+output_all_info(minmax *mm, int count, int indent_level)
+{
+    int i;
+
+    for (i = 0; i < count; ++i) {
+        print_indent(indent_level);
+        output_report("Iteration %d:\n", i + 1);
+        print_indent(indent_level + 1);
+        output_report("Minimum Time: %.2fs\n", mm[i].min);
+        print_indent(indent_level + 1);
+        output_report("Maximum Time: %.2fs\n", mm[i].max);
+    }
+}
+
+/*
+ * Function:    get_minmax
+ * Purpose:     Gather all the min, max and total of val.
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 21. December 2001
+ * Modifications:
+ *    Use MPI_Allreduce to do it. -akc, 2002/01/11
+ */
+static void
+get_minmax(minmax *mm, double val)
+{
+    int myrank;
+
+    MPI_Comm_rank(pio_comm_g, &myrank);
+    MPI_Comm_size(pio_comm_g, &mm->num);
+
+    MPI_Allreduce(&val, &mm->max, 1, MPI_DOUBLE, MPI_MAX, pio_comm_g);
+    MPI_Allreduce(&val, &mm->min, 1, MPI_DOUBLE, MPI_MIN, pio_comm_g);
+    MPI_Allreduce(&val, &mm->sum, 1, MPI_DOUBLE, MPI_SUM, pio_comm_g);
+}
+
+/*
+ * Function:    accumulate_minmax_stuff
+ * Purpose:     Accumulate the minimum, maximum, and average of the times
+ *              across all processes.
+ * Return:      TOTAL_MM - the total of all of these.
+ * Programmer:  Bill Wendling, 21. December 2001
+ * Modifications:
+ *              Changed to use seconds instead of MB/s - QAK, 5/9/02
+ */
+static minmax
+accumulate_minmax_stuff(minmax *mm, int count)
+{
+    int i;
+    minmax total_mm;
+
+    total_mm.sum = 0.0;
+    total_mm.max = -DBL_MAX;
+    total_mm.min = DBL_MAX;
+    total_mm.num = count;
+
+    for (i = 0; i < count; ++i) {
+        double m = mm[i].max;
+
+        total_mm.sum += m;
+
+        if (m < total_mm.min)
+            total_mm.min = m;
+
+        if (m > total_mm.max)
+            total_mm.max = m;
+    }
+
+    return total_mm;
+}
+
+/*
+ * Function:    create_comm_world
+ * Purpose:     Create an MPI Comm world and store it in pio_comm_g, which
+ *              is a global variable.
+ * Return:      SUCCESS on success.
+ *              FAIL otherwise.
+ * Programmer:  Bill Wendling, 19. December 2001
+ * Modifications:
+ */
+static int
+create_comm_world(int num_procs, int *doing_pio)
+{
+    /* MPI variables */
+    int     mrc;     /* return values                */
+    int     color;              /* for communicator creation    */
+    int     myrank, nprocs;
+
+    pio_comm_g = MPI_COMM_NULL;
+
+    /*
+     * Create a sub communicator for this PIO run. Easier to use the first N
+     * processes.
+     */
+    MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
+
+    if (num_procs > nprocs) {
+        fprintf(stderr,
+                "number of process(%d) must be <= number of processes in MPI_COMM_WORLD(%d)\n",
+                num_procs, nprocs);
+        goto error_done;
+    }
+
+    MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
+    color = (myrank < num_procs);
+    mrc = MPI_Comm_split(MPI_COMM_WORLD, color, myrank, &pio_comm_g);
+
+    if (mrc != MPI_SUCCESS) {
+        fprintf(stderr, "MPI_Comm_split failed\n");
+        goto error_done;
+    }
+
+    if (!color) {
+        /* not involved in this run */
+        mrc = destroy_comm_world();
+        goto done;
+    }
+
+    /* determine the MPI rank in the PIO communicator */
+    MPI_Comm_size(pio_comm_g, &pio_mpi_nprocs_g);
+    MPI_Comm_rank(pio_comm_g, &pio_mpi_rank_g);
+
+done:
+    *doing_pio = color;
+    return SUCCESS;
+
+error_done:
+    destroy_comm_world();
+    return FAIL;
+}
+
+/*
+ * Function:    destroy_comm_world
+ * Purpose:     Destroy the created MPI Comm world which is stored in the
+ *              pio_comm_g global variable.
+ * Return:      SUCCESS on success.
+ *              FAIL otherwise.
+ * Programmer:  Bill Wendling, 19. December 2001
+ * Modifications:
+ */
+static int
+destroy_comm_world(void)
+{
+    int     mrc = SUCCESS;      /* return code      */
+
+    /* release MPI resources */
+    if (pio_comm_g != MPI_COMM_NULL)
+        mrc = (MPI_Comm_free(&pio_comm_g) == MPI_SUCCESS ? SUCCESS : FAIL);
+
+    return mrc;
+}
+
+/*
+ * Function:    output_results
+ * Purpose:     Print information about the time & bandwidth for a given
+ *                  minmax & # of iterations.
+ * Return:      Nothing
+ * Programmer:  Quincey Koziol, 9. May 2002
+ * Modifications:
+ */
+static void
+output_results(const struct options *opts, const char *name, minmax *table,
+    int table_size,off_t data_size)
+{
+    minmax          total_mm;
+
+    total_mm = accumulate_minmax_stuff(table, table_size);
+
+    print_indent(3);
+    output_report("%s (%d iteration(s)):\n", name,table_size);
+
+    /* Note: The maximum throughput uses the minimum amount of time & vice versa */
+
+    print_indent(4);
+    output_report("Maximum Throughput: %6.2f MB/s", MB_PER_SEC(data_size,total_mm.min));
+    if(opts->print_times)
+        output_report(" (%7.3f s)\n", total_mm.min);
+    else
+        output_report("\n");
+
+    print_indent(4);
+    output_report("Average Throughput: %6.2f MB/s",
+                  MB_PER_SEC(data_size,total_mm.sum / total_mm.num));
+    if(opts->print_times)
+        output_report(" (%7.3f s)\n", (total_mm.sum / total_mm.num));
+    else
+        output_report("\n");
+
+    print_indent(4);
+    output_report("Minimum Throughput: %6.2f MB/s", MB_PER_SEC(data_size,total_mm.max));
+    if(opts->print_times)
+        output_report(" (%7.3f s)\n", total_mm.max);
+    else
+        output_report("\n");
+
+}
+
+static void
+output_times(const struct options *opts, const char *name, minmax *table,
+    int table_size)
+{
+    minmax          total_mm;
+
+    total_mm = accumulate_minmax_stuff(table, table_size);
+
+    print_indent(3);
+    output_report("%s (%d iteration(s)):\n", name,table_size);
+
+    /* Note: The maximum throughput uses the minimum amount of time & vice versa */
+
+    print_indent(4);
+        output_report("Minimum Accumulated Time using %d file(s): %7.5f s\n", opts->num_files,(total_mm.min));
+
+    print_indent(4);
+        output_report("Average Accumulated Time using %d file(s): %7.5f s\n", opts->num_files,(total_mm.sum / total_mm.num));
+
+    print_indent(4);
+        output_report("Maximum Accumulated Time using %d file(s): %7.5f s\n", opts->num_files,(total_mm.max));
+}
+
+/*
+ * Function:    output_report
+ * Purpose:     Print a line of the report. Only do so if I'm the 0 process.
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 19. December 2001
+ * Modifications:
+ */
+static void
+output_report(const char *fmt, ...)
+{
+    int myrank;
+
+    MPI_Comm_rank(pio_comm_g, &myrank);
+
+    if (myrank == 0) {
+        va_list ap;
+
+        va_start(ap, fmt);
+        vfprintf(output, fmt, ap);
+        va_end(ap);
+    }
+}
+
+/*
+ * Function:    print_indent
+ * Purpose:     Print spaces to indent a new line of text for pretty printing
+ *              things.
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 29. October 2001
+ * Modifications:
+ */
+static void
+print_indent(register int indent)
+{
+    int myrank;
+
+    MPI_Comm_rank(pio_comm_g, &myrank);
+
+    if (myrank == 0) {
+	indent *= TAB_SPACE;
+
+	for (; indent > 0; --indent)
+	    fputc(' ', output);
+    }
+}
+
+static void
+recover_size_and_print(long long val, const char *end)
+{
+    if (val >= ONE_KB && (val % ONE_KB) == 0) {
+        if (val >= ONE_MB && (val % ONE_MB) == 0) {
+            if (val >= ONE_GB && (val % ONE_GB) == 0)
+                HDfprintf(output, "%" H5_PRINTF_LL_WIDTH "d""GB%s", val / ONE_GB, end);
+            else
+                HDfprintf(output, "%" H5_PRINTF_LL_WIDTH "d""MB%s", val / ONE_MB, end);
+        } else {
+            HDfprintf(output, "%" H5_PRINTF_LL_WIDTH "d""KB%s", val / ONE_KB, end);
+        }
+    } else {
+        HDfprintf(output, "%" H5_PRINTF_LL_WIDTH "d""%s", val, end);
+    }
+}
+
+static void
+print_io_api(long io_types)
+{
+    if (io_types & PIO_POSIX)
+	HDfprintf(output, "posix ");
+    if (io_types & PIO_MPI)
+	HDfprintf(output, "mpiio ");
+    if (io_types & PIO_HDF5)
+	HDfprintf(output, "phdf5 ");
+    HDfprintf(output, "\n");
+}
+
+static void
+report_parameters(struct options *opts)
+{
+    int rank = comm_world_rank_g;
+
+    print_version("HDF5 Library");	/* print library version */
+    HDfprintf(output, "rank %d: ==== Parameters ====\n", rank);
+
+    HDfprintf(output, "rank %d: IO API=", rank);
+    print_io_api(opts->io_types);
+
+    HDfprintf(output, "rank %d: Number of files=%ld\n", rank,
+              opts->num_files);
+    HDfprintf(output, "rank %d: Number of datasets=%ld\n", rank,
+              opts->num_dsets);
+    HDfprintf(output, "rank %d: Number of iterations=%d\n", rank,
+              opts->num_iters);
+    HDfprintf(output, "rank %d: Number of processes=%d:%d\n", rank,
+              opts->min_num_procs, opts->max_num_procs);
+
+    if (opts->dim2d){
+    HDfprintf(output, "rank %d: Number of bytes per process per dataset=", rank);
+    recover_size_and_print((long long)(opts->num_bpp * opts->num_bpp * opts->min_num_procs), ":");
+    recover_size_and_print((long long)(opts->num_bpp * opts->num_bpp * opts->max_num_procs), "\n");
+
+    HDfprintf(output, "rank %d: Size of dataset(s)=", rank);
+    recover_size_and_print((long long)(opts->num_bpp * opts->min_num_procs), "x");
+    recover_size_and_print((long long)(opts->num_bpp * opts->min_num_procs), ":");
+    recover_size_and_print((long long)(opts->num_bpp * opts->max_num_procs), "x");
+    recover_size_and_print((long long)(opts->num_bpp * opts->max_num_procs), "\n");
+
+    HDfprintf(output, "rank %d: File size=", rank);
+    recover_size_and_print((long long)(pow(opts->num_bpp * opts->min_num_procs,2)
+            * opts->num_dsets), ":");
+    recover_size_and_print((long long)(pow(opts->num_bpp * opts->max_num_procs,2)
+            * opts->num_dsets), "\n");
+
+    HDfprintf(output, "rank %d: Transfer buffer size=", rank);
+    if(opts->interleaved){
+        recover_size_and_print((long long)opts->min_xfer_size, "x");
+        recover_size_and_print((long long)opts->blk_size, ":");
+        recover_size_and_print((long long)opts->max_xfer_size, "x");
+        recover_size_and_print((long long)opts->blk_size, "\n");
+    }
+    else{
+        recover_size_and_print((long long)opts->blk_size, "x");
+        recover_size_and_print((long long)opts->min_xfer_size, ":");
+        recover_size_and_print((long long)opts->blk_size, "x");
+        recover_size_and_print((long long)opts->max_xfer_size, "\n");
+    }
+    HDfprintf(output, "rank %d: Block size=", rank);
+    recover_size_and_print((long long)opts->blk_size, "x");
+    recover_size_and_print((long long)opts->blk_size, "\n");
+    }
+    else{
+    HDfprintf(output, "rank %d: Number of bytes per process per dataset=", rank);
+    recover_size_and_print((long long)opts->num_bpp, "\n");
+
+    HDfprintf(output, "rank %d: Size of dataset(s)=", rank);
+    recover_size_and_print((long long)(opts->num_bpp * opts->min_num_procs), ":");
+    recover_size_and_print((long long)(opts->num_bpp * opts->max_num_procs), "\n");
+
+    HDfprintf(output, "rank %d: File size=", rank);
+    recover_size_and_print((long long)(opts->num_bpp * opts->min_num_procs
+            * opts->num_dsets), ":");
+    recover_size_and_print((long long)(opts->num_bpp * opts->max_num_procs
+            * opts->num_dsets), "\n");
+
+    HDfprintf(output, "rank %d: Transfer buffer size=", rank);
+    recover_size_and_print((long long)opts->min_xfer_size, ":");
+    recover_size_and_print((long long)opts->max_xfer_size, "\n");
+    HDfprintf(output, "rank %d: Block size=", rank);
+    recover_size_and_print((long long)opts->blk_size, "\n");
+    }
+
+    HDfprintf(output, "rank %d: Block Pattern in Dataset=", rank);
+    if(opts->interleaved)
+        HDfprintf(output, "Interleaved\n");
+    else
+        HDfprintf(output, "Contiguous\n");
+
+    HDfprintf(output, "rank %d: I/O Method for MPI and HDF5=", rank);
+    if(opts->collective)
+        HDfprintf(output, "Collective\n");
+    else
+        HDfprintf(output, "Independent\n");
+
+    HDfprintf(output, "rank %d: Geometry=", rank);
+    if(opts->dim2d)
+        HDfprintf(output, "2D\n");
+    else
+        HDfprintf(output, "1D\n");
+
+    HDfprintf(output, "rank %d: VFL used for HDF5 I/O=%s\n", rank, "MPI-IO driver");
+
+    HDfprintf(output, "rank %d: Data storage method in HDF5=", rank);
+    if(opts->h5_use_chunks)
+        HDfprintf(output, "Chunked\n");
+    else
+        HDfprintf(output, "Contiguous\n");
+
+    {
+        char *prefix = getenv("HDF5_PARAPREFIX");
+
+        HDfprintf(output, "rank %d: Env HDF5_PARAPREFIX=%s\n", rank,
+                  (prefix ? prefix : "not set"));
+    }
+
+    HDfprintf(output, "rank %d: ", rank);
+    h5_dump_info_object(h5_io_info_g);
+
+    HDfprintf(output, "rank %d: ==== End of Parameters ====\n", rank);
+    HDfprintf(output, "\n");
+}
+
+/*
+ * Function:    parse_command_line
+ * Purpose:     Parse the command line options and return a STRUCT OPTIONS
+ *              structure which will need to be freed by the calling function.
+ * Return:      Pointer to an OPTIONS structure
+ * Programmer:  Bill Wendling, 31. October 2001
+ * Modifications:
+ *    Added 2D testing (Christian Chilan, 10. August 2005)
+ */
+static struct options *
+parse_command_line(int argc, char *argv[])
+{
+    register int opt;
+    struct options *cl_opts;
+
+    cl_opts = (struct options *)malloc(sizeof(struct options));
+
+    cl_opts->output_file = NULL;
+    cl_opts->io_types =  0;    /* will set default after parsing options */
+    cl_opts->num_dsets = 1;
+    cl_opts->num_files = 1;
+    cl_opts->num_bpp = 0;
+    cl_opts->num_iters = 1;
+    cl_opts->max_num_procs = comm_world_nprocs_g;
+    cl_opts->min_num_procs = 1;
+    cl_opts->max_xfer_size = 0;
+    cl_opts->min_xfer_size = 0;
+    cl_opts->blk_size = 0;
+    cl_opts->interleaved = 0;       /* Default to contiguous blocks in dataset */
+    cl_opts->collective = 0;        /* Default to independent I/O access */
+    cl_opts->dim2d = 0;             /* Default to 1D */
+    cl_opts->print_times = FALSE;   /* Printing times is off by default */
+    cl_opts->print_raw = FALSE;     /* Printing raw data throughput is off by default */
+    cl_opts->h5_alignment = 1;      /* No alignment for HDF5 objects by default */
+    cl_opts->h5_threshold = 1;      /* No threshold for aligning HDF5 objects by default */
+    cl_opts->h5_use_chunks = FALSE; /* Don't chunk the HDF5 dataset by default */
+    cl_opts->h5_write_only = FALSE; /* Do both read and write by default */
+    cl_opts->verify = FALSE;        /* No Verify data correctness by default */
+
+    while ((opt = get_option(argc, (const char **)argv, s_opts, l_opts)) != EOF) {
+        switch ((char)opt) {
+        case 'a':
+            cl_opts->h5_alignment = parse_size_directive(opt_arg);
+            break;
+        case 'A':
+            {
+                const char *end = opt_arg;
+
+                while (end && *end != '\0') {
+                    char buf[10];
+                    int i;
+
+                    memset(buf, '\0', sizeof(buf));
+
+                    for (i = 0; *end != '\0' && *end != ','; ++end)
+                        if (isalnum(*end) && i < 10)
+                            buf[i++] = *end;
+
+                    if (!HDstrcasecmp(buf, "phdf5")) {
+                        cl_opts->io_types |= PIO_HDF5;
+                    } else if (!HDstrcasecmp(buf, "mpiio")) {
+                        cl_opts->io_types |= PIO_MPI;
+                    } else if (!HDstrcasecmp(buf, "posix")) {
+                        cl_opts->io_types |= PIO_POSIX;
+                    } else {
+                        fprintf(stderr, "pio_perf: invalid --api option %s\n",
+                                buf);
+                        exit(EXIT_FAILURE);
+                    }
+
+                    if (*end == '\0')
+                        break;
+
+                    end++;
+                }
+            }
+
+            break;
+#if 0
+        case 'b':
+            /* the future "binary" option */
+            break;
+#endif  /* 0 */
+        case 'B':
+            cl_opts->blk_size = parse_size_directive(opt_arg);
+            break;
+        case 'c':
+            /* Turn on chunked HDF5 dataset creation */
+            cl_opts->h5_use_chunks = TRUE;
+            break;
+        case 'C':
+            cl_opts->collective = 1;
+            break;
+        case 'd':
+            cl_opts->num_dsets = atoi(opt_arg);
+            break;
+        case 'D':
+            {
+                const char *end = opt_arg;
+
+                while (end && *end != '\0') {
+                    char buf[10];
+                    int i;
+
+                    memset(buf, '\0', sizeof(buf));
+
+                    for (i = 0; *end != '\0' && *end != ','; ++end)
+                        if (isalnum(*end) && i < 10)
+                            buf[i++] = *end;
+
+                    if (strlen(buf) > 1 || isdigit(buf[0])) {
+                        size_t j;
+
+                        for (j = 0; j < 10 && buf[j] != '\0'; ++j)
+                            if (!isdigit(buf[j])) {
+                                fprintf(stderr, "pio_perf: invalid --debug option %s\n",
+                                        buf);
+                                exit(EXIT_FAILURE);
+                            }
+
+                        pio_debug_level = atoi(buf);
+
+                        if (pio_debug_level > 4)
+                            pio_debug_level = 4;
+                        else if (pio_debug_level < 0)
+                            pio_debug_level = 0;
+                    } else {
+                        switch (*buf) {
+                        case 'r':
+                            /* Turn on raw data throughput info */
+                            cl_opts->print_raw = TRUE;
+                            break;
+                        case 't':
+                            /* Turn on time printing */
+                            cl_opts->print_times = TRUE;
+                            break;
+            case 'v':
+                            /* Turn on verify data correctness*/
+                cl_opts->verify = TRUE;
+                break;
+                        default:
+                            fprintf(stderr, "pio_perf: invalid --debug option %s\n", buf);
+                            exit(EXIT_FAILURE);
+                        }
+                    }
+
+                    if (*end == '\0')
+                        break;
+
+                    end++;
+                }
+            }
+
+            break;
+        case 'e':
+            cl_opts->num_bpp = parse_size_directive(opt_arg);
+            break;
+        case 'F':
+            cl_opts->num_files = atoi(opt_arg);
+            break;
+        case 'g':
+            cl_opts->dim2d = 1;
+            break;
+        case 'i':
+            cl_opts->num_iters = atoi(opt_arg);
+            break;
+        case 'I':
+            cl_opts->interleaved = 1;
+            break;
+        case 'o':
+            cl_opts->output_file = opt_arg;
+            break;
+        case 'p':
+            cl_opts->min_num_procs = atoi(opt_arg);
+            break;
+        case 'P':
+            cl_opts->max_num_procs = atoi(opt_arg);
+            break;
+        case 'T':
+            cl_opts->h5_threshold = parse_size_directive(opt_arg);
+            break;
+        case 'w':
+            cl_opts->h5_write_only = TRUE;
+            break;
+        case 'x':
+            cl_opts->min_xfer_size = parse_size_directive(opt_arg);
+            break;
+        case 'X':
+            cl_opts->max_xfer_size = parse_size_directive(opt_arg);
+            break;
+        case 'h':
+        case '?':
+        default:
+            usage(progname);
+            free(cl_opts);
+            return NULL;
+        }
+    }
+
+
+    if (cl_opts->num_bpp == 0){
+        if (cl_opts->dim2d == 0)
+            cl_opts->num_bpp = 256 * ONE_KB;
+        else
+            cl_opts->num_bpp = 8 * ONE_KB;
+    }
+
+    if (cl_opts->max_xfer_size == 0)
+        cl_opts->max_xfer_size = cl_opts->num_bpp;
+
+    if (cl_opts->min_xfer_size == 0)
+        cl_opts->min_xfer_size = (cl_opts->num_bpp)/2;
+
+    if (cl_opts->blk_size == 0)
+        cl_opts->blk_size = (cl_opts->num_bpp)/2;
+
+
+    /* set default if none specified yet */
+    if (!cl_opts->io_types)
+    cl_opts->io_types = PIO_HDF5 | PIO_MPI | PIO_POSIX; /* run all API */
+
+    /* verify parameters sanity.  Adjust if needed. */
+    /* cap xfer_size with bytes per process */
+    if (!cl_opts->dim2d) {
+        if (cl_opts->min_xfer_size > cl_opts->num_bpp)
+        cl_opts->min_xfer_size = cl_opts->num_bpp;
+        if (cl_opts->max_xfer_size > cl_opts->num_bpp)
+        cl_opts->max_xfer_size = cl_opts->num_bpp;
+    }
+    if (cl_opts->min_xfer_size > cl_opts->max_xfer_size)
+    cl_opts->min_xfer_size = cl_opts->max_xfer_size;
+    if (cl_opts->blk_size > cl_opts->num_bpp )
+        cl_opts->blk_size = cl_opts->num_bpp;
+    /* check range of number of processes */
+    if (cl_opts->min_num_procs <= 0)
+    cl_opts->min_num_procs = 1;
+    if (cl_opts->max_num_procs <= 0)
+    cl_opts->max_num_procs = 1;
+    if (cl_opts->min_num_procs > cl_opts->max_num_procs)
+    cl_opts->min_num_procs = cl_opts->max_num_procs;
+    /* check iteration */
+    if (cl_opts->num_iters <= 0)
+    cl_opts->num_iters = 1;
+
+    return cl_opts;
+}
+
+/*
+ * Function:    parse_size_directive
+ * Purpose:     Parse the size directive passed on the commandline. The size
+ *              directive is an integer followed by a size indicator:
+ *
+ *                  K, k - Kilobyte
+ *                  M, m - Megabyte
+ *                  G, g - Gigabyte
+ *
+ * Return:      The size as a off_t because this is related to file size.
+ *              If an unknown size indicator is used, then the program will
+ *              exit with EXIT_FAILURE as the return value.
+ * Programmer:  Bill Wendling, 18. December 2001
+ * Modifications:
+ */
+static off_t
+parse_size_directive(const char *size)
+{
+    off_t s;
+    char *endptr;
+
+    s = strtol(size, &endptr, 10);
+
+    if (endptr && *endptr) {
+        while (*endptr != '\0' && (*endptr == ' ' || *endptr == '\t'))
+            ++endptr;
+
+        switch (*endptr) {
+            case 'K':
+            case 'k':
+                s *= ONE_KB;
+                break;
+            case 'M':
+            case 'm':
+                s *= ONE_MB;
+                break;
+            case 'G':
+            case 'g':
+                s *= ONE_GB;
+                break;
+            default:
+                fprintf(stderr, "Illegal size specifier '%c'\n", *endptr);
+                exit(EXIT_FAILURE);
+        }
+    }
+
+    return s;
+}
+
+/*
+ * Function:    usage
+ * Purpose:     Print a usage message and then exit.
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 31. October 2001
+ * Modifications:
+ * 	Added 2D testing (Christian Chilan, 10. August 2005)
+ */
+static void
+usage(const char *prog)
+{
+    int myrank;
+
+    MPI_Comm_rank(pio_comm_g, &myrank);
+
+    if (myrank == 0) {
+	print_version(prog);
+        printf("usage: %s [OPTIONS]\n", prog);
+        printf("  OPTIONS\n");
+        printf("     -h, --help                  Print a usage message and exit\n");
+        printf("     -a S, --align=S             Alignment of objects in HDF5 file [default: 1]\n");
+        printf("     -A AL, --api=AL             Which APIs to test [default: all of them]\n");
+#if 0
+        printf("     -b, --binary                The elusive binary option\n");
+#endif  /* 0 */
+        printf("     -B S, --block-size=S        Block size within transfer buffer\n");
+        printf("                                 (see below for description)\n");
+        printf("                                 [default: half the number of bytes per process\n");
+        printf("                                           per dataset]\n");
+        printf("     -c, --chunk                 Create HDF5 datasets using chunked storage\n");
+        printf("                                 [default: contiguous storage]\n");
+        printf("     -C, --collective            Use collective I/O for MPI and HDF5 APIs\n");
+        printf("                                 [default: independent I/O)\n");
+        printf("     -d N, --num-dsets=N         Number of datasets per file [default: 1]\n");
+        printf("     -D DL, --debug=DL           Indicate the debugging level\n");
+        printf("                                 [default: no debugging]\n");
+        printf("     -e S, --num-bytes=S         Number of bytes per process per dataset\n");
+        printf("                                 (see below for description)\n");
+        printf("                                 [default: 256K for 1D, 8K for 2D]\n");
+        printf("     -F N, --num-files=N         Number of files [default: 1]\n");
+        printf("     -g, --geometry              Use 2D geometry [default: 1D geometry]\n");
+        printf("     -i N, --num-iterations=N    Number of iterations to perform [default: 1]\n");
+        printf("     -I, --interleaved           Interleaved access pattern\n");
+        printf("                                 (see below for example)\n");
+        printf("                                 [default: Contiguous access pattern]\n");
+        printf("     -o F, --output=F            Output raw data into file F [default: none]\n");
+        printf("     -p N, --min-num-processes=N Minimum number of processes to use [default: 1]\n");
+        printf("     -P N, --max-num-processes=N Maximum number of processes to use\n");
+        printf("                                 [default: all MPI_COMM_WORLD processes ]\n");
+        printf("     -T S, --threshold=S         Threshold for alignment of objects in HDF5 file\n");
+        printf("                                 [default: 1]\n");
+        printf("     -w, --write-only            Perform write tests not the read tests\n");
+        printf("     -x S, --min-xfer-size=S     Minimum transfer buffer size\n");
+        printf("                                 (see below for description)\n");
+        printf("                                 [default: half the number of bytes per process\n");
+        printf("                                           per dataset]\n");
+        printf("     -X S, --max-xfer-size=S     Maximum transfer buffer size\n");
+        printf("                                 [default: the number of bytes per process per\n");
+        printf("                                           dataset]\n");
+        printf("\n");
+        printf("  F  - is a filename.\n");
+        printf("  N  - is an integer >=0.\n");
+        printf("  S  - is a size specifier, an integer >=0 followed by a size indicator:\n");
+        printf("          K - Kilobyte (%d)\n", ONE_KB);
+        printf("          M - Megabyte (%d)\n", ONE_MB);
+        printf("          G - Gigabyte (%d)\n", ONE_GB);
+        printf("\n");
+        printf("      Example: '37M' is 37 megabytes or %d bytes\n", 37*ONE_MB);
+        printf("\n");
+        printf("  AL - is an API list. Valid values are:\n");
+        printf("          phdf5 - Parallel HDF5\n");
+        printf("          mpiio - MPI-I/O\n");
+        printf("          posix - POSIX\n");
+        printf("\n");
+        printf("      Example: --api=mpiio,phdf5\n");
+        printf("\n");
+        printf("  Dataset size:\n");
+        printf("      Depending on the selected geometry, each test dataset is either a linear\n");
+        printf("      array of size bytes-per-process * num-processes, or a square array of size\n");
+        printf("      (bytes-per-process * num-processes) x (bytes-per-process * num-processes).\n");
+        printf("\n");
+        printf("  Block size vs. Transfer buffer size:\n");
+        printf("      buffer-size controls the size of the memory buffer, which is broken into\n");
+        printf("      blocks and written to the file. Depending on the selected geometry, each\n");
+        printf("      block can be a linear array of size block-size or a square array of size\n");
+        printf("      block-size x block-size. The arrangement in which blocks are written is\n");
+        printf("      determined by the access pattern.\n");
+        printf("\n");
+        printf("      In 1D geometry, the transfer buffer is a linear array of size buffer-size.\n");
+        printf("      In 2D geometry, it is a rectangular array of size block-size x buffer-size\n");
+        printf("      or buffer-size x block-size if interleaved pattern is selected.\n");
+        printf("\n");
+        printf("  Interleaved and Contiguous patterns in 1D geometry:\n");
+        printf("      When contiguous access pattern is chosen, the dataset is evenly divided\n");
+        printf("      into num-processes regions and each process writes data to its own region.\n");
+        printf("      When interleaved blocks are written to a dataset, space for the first\n");
+        printf("      block of the first process is allocated in the dataset, then space is\n");
+        printf("      allocated for the first block of the second process, etc. until space is\n");
+        printf("      allocated for the first block of each process, then space is allocated for\n");
+        printf("      the second block of the first process, the second block of the second\n");
+        printf("      process, etc.\n");
+        printf("\n");
+        printf("      For example, with a 3 process run, 512KB bytes-per-process, 256KB transfer\n");
+        printf("        buffer size, and 64KB block size, each process must issue 2 transfer\n");
+        printf("        requests to complete access to the dataset.\n");
+        printf("          Contiguous blocks of the first transfer request are written like so:\n");
+        printf("              1111----2222----3333----\n");
+        printf("          Interleaved blocks of the first transfer request are written like so:\n");
+        printf("              123123123123------------\n");
+        printf("        The actual number of I/O operations involved in a transfer request\n");
+        printf("        depends on the access pattern and communication mode.\n");
+        printf("        When using independent I/O with interleaved pattern, each process\n");
+        printf("        performs 4 small non-contiguous I/O operations per transfer request.\n");
+        printf("        If collective I/O is turned on, the combined content of the buffers of\n");
+        printf("        the 3 processes will be written using one collective I/O operation\n");
+        printf("        per transfer request.\n");
+        printf("\n");
+        printf("      For information about access patterns in 2D geometry, please refer to the\n");
+        printf("      HDF5 Reference Manual.\n");
+        printf("\n");
+        printf("  DL - is a list of debugging flags. Valid values are:\n");
+        printf("          1 - Minimal\n");
+        printf("          2 - Not quite everything\n");
+        printf("          3 - Everything\n");
+        printf("          4 - The kitchen sink\n");
+        printf("          r - Raw data I/O throughput information\n");
+        printf("          t - Times as well as throughputs\n");
+        printf("          v - Verify data correctness\n");
+        printf("\n");
+        printf("      Example: --debug=2,r,t\n");
+        printf("\n");
+        printf("  Environment variables:\n");
+        printf("  HDF5_NOCLEANUP   Do not remove data files if set [default remove]\n");
+        printf("  HDF5_MPI_INFO    MPI INFO object key=value separated by ;\n");
+        printf("  HDF5_PARAPREFIX  Paralllel data files prefix\n");
+        fflush(stdout);
+    }
+}
+
+#else /* H5_HAVE_PARALLEL */
+
+/*
+ * Function:    main
+ * Purpose:     Dummy main() function for if HDF5 was configured without
+ *              parallel stuff.
+ * Return:      EXIT_SUCCESS
+ * Programmer:  Bill Wendling, 14. November 2001
+ * Modifications:
+ */
+int
+main(void)
+{
+    printf("No parallel IO performance because parallel is not configured\n");
+    return EXIT_SUCCESS;
+}
+
+#endif /* !H5_HAVE_PARALLEL */
diff --git a/tools/perform/pio_perf.h b/tools/perform/pio_perf.h
new file mode 100644
index 0000000..3295e2b
--- /dev/null
+++ b/tools/perform/pio_perf.h
@@ -0,0 +1,105 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef PIO_PERF_H__
+#define PIO_PERF_H__
+
+#ifndef STANDALONE
+#include "H5private.h"
+#include "h5test.h"
+#include "h5tools.h"
+#include "h5tools_utils.h"
+#else
+#include "pio_standalone.h"
+#endif
+#include "pio_timer.h"
+
+/* setup the dataset no fill option if this is v1.5 or more */
+#if H5_VERS_MAJOR > 1 || H5_VERS_MINOR > 4
+#define H5_HAVE_NOFILL 1
+#endif
+
+typedef enum iotype_ {
+    POSIXIO,
+    MPIO,
+    PHDF5
+    /*NUM_TYPES*/
+} iotype;
+
+typedef struct parameters_ {
+    iotype	io_type;        /* The type of IO test to perform       */
+    int		num_procs;      /* Maximum number of processes to use   */
+    long	num_files;      /* Number of files to create            */
+    long	num_dsets;      /* Number of datasets to create         */
+    off_t	num_bytes;      /* Number of bytes in each dset         */
+    int         num_iters;      /* Number of times to loop doing the IO */
+    size_t 	buf_size;       /* Buffer size                          */
+    size_t 	blk_size;       /* Block size                           */
+    unsigned    interleaved;    /* Interleaved vs. contiguous blocks    */
+    unsigned    collective;     /* Collective vs. independent I/O       */
+    unsigned    dim2d;          /* 1D vs. 2D                            */
+    hsize_t 	h5_align;       /* HDF5 object alignment                */
+    hsize_t 	h5_thresh;      /* HDF5 object alignment threshold      */
+    int 	h5_use_chunks;  /* Make HDF5 dataset chunked            */
+    int    	h5_write_only;  /* Perform the write tests only         */
+    int 	verify;    	/* Verify data correctness              */
+} parameters;
+
+typedef struct results_ {
+    herr_t      ret_code;
+    pio_time   *timers;
+} results;
+
+#ifndef SUCCESS
+#define SUCCESS     0
+#endif  /* !SUCCESS */
+
+#ifndef FAIL
+#define FAIL        -1
+#endif  /* !FAIL */
+
+extern FILE     *output;            /* output file                          */
+extern pio_time *timer_g;           /* timer: global for stub functions     */
+extern int      comm_world_rank_g;  /* my rank in MPI_COMM_RANK             */
+extern int      comm_world_nprocs_g;/* num. of processes of MPI_COMM_WORLD  */
+extern MPI_Comm pio_comm_g;         /* Communicator to run the PIO          */
+extern int      pio_mpi_rank_g;     /* MPI rank of pio_comm_g               */
+extern int      pio_mpi_nprocs_g;   /* number of processes of pio_comm_g    */
+extern int      pio_debug_level;    /* The debug level:
+                                     *   0 - Off
+                                     *   1 - Minimal
+                                     *   2 - Some more
+                                     *   3 - Maximal
+                                     *   4 - Even More Debugging (timer stuff)
+                                     */
+
+#define HDprint_rank(f)              /* print rank in MPI_COMM_WORLD */    \
+    HDfprintf(f, "%d: ", comm_world_rank_g);
+#define HDprint_size(f)              /* print size of MPI_COMM_WORLD */    \
+    HDfprintf(f, "%d", comm_world_nprocs_g);
+#define HDprint_rank_size(f)         /* print rank/size of MPI_COMM_WORLD */  \
+    HDfprintf(f, "%d/%d: ", comm_world_rank_g, comm_world_nprocs_g);
+
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+
+extern results do_pio(parameters param);
+
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
+#endif  /* PIO_PERF_H__ */
diff --git a/tools/perform/pio_standalone.c b/tools/perform/pio_standalone.c
new file mode 100644
index 0000000..e404274
--- /dev/null
+++ b/tools/perform/pio_standalone.c
@@ -0,0 +1,282 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+
+/* This file contains the definition of functions required to build h5perf in
+ * STANDALONE mode.
+ * Created: Christian Chilan, 2005/5/18.
+ */
+
+#include "pio_perf.h"
+
+
+/** From h5tools_utils.c **/
+
+/* global variables */
+int   nCols = 80;
+
+/* ``get_option'' variables */
+int         opt_err = 1;    /*get_option prints errors if this is on */
+int         opt_ind = 1;    /*token pointer                          */
+const char *opt_arg;        /*flag argument (or value)               */
+
+
+int
+get_option(int argc, const char **argv, const char *opts, const struct long_options *l_opts)
+{
+    static int sp = 1;    /* character index in current token */
+    int opt_opt = '?';    /* option character passed back to user */
+
+    if (sp == 1) {
+        /* check for more flag-like tokens */
+        if (opt_ind >= argc || argv[opt_ind][0] != '-' || argv[opt_ind][1] == '\0') {
+            return EOF;
+        } else if (HDstrcmp(argv[opt_ind], "--") == 0) {
+            opt_ind++;
+            return EOF;
+        }
+    }
+
+    if (sp == 1 && argv[opt_ind][0] == '-' && argv[opt_ind][1] == '-') {
+        /* long command line option */
+        const char *arg = &argv[opt_ind][2];
+        int i;
+
+        for (i = 0; l_opts && l_opts[i].name; i++) {
+            size_t len = HDstrlen(l_opts[i].name);
+
+            if (HDstrncmp(arg, l_opts[i].name, len) == 0) {
+                /* we've found a matching long command line flag */
+                opt_opt = l_opts[i].shortval;
+
+                if (l_opts[i].has_arg != no_arg) {
+                    if (arg[len] == '=') {
+                        opt_arg = &arg[len + 1];
+                    } else if (opt_ind < (argc - 1) && argv[opt_ind + 1][0] != '-') {
+                        opt_arg = argv[++opt_ind];
+                    } else if (l_opts[i].has_arg == require_arg) {
+                        if (opt_err)
+                            HDfprintf(stderr,
+                                    "%s: option required for \"--%s\" flag\n",
+                                    argv[0], arg);
+
+                        opt_opt = '?';
+                    }
+                } else {
+                    if (arg[len] == '=') {
+                        if (opt_err)
+                            HDfprintf(stderr,
+                                    "%s: no option required for \"%s\" flag\n",
+                                    argv[0], arg);
+
+                        opt_opt = '?';
+                    }
+
+                    opt_arg = NULL;
+                }
+
+                break;
+            }
+        }
+
+        if (l_opts[i].name == NULL) {
+            /* exhausted all of the l_opts we have and still didn't match */
+            if (opt_err)
+                HDfprintf(stderr, "%s: unknown option \"%s\"\n", argv[0], arg);
+
+            opt_opt = '?';
+        }
+
+        opt_ind++;
+        sp = 1;
+    } else {
+        register char *cp;    /* pointer into current token */
+
+        /* short command line option */
+        opt_opt = argv[opt_ind][sp];
+
+        if (opt_opt == ':' || (cp = strchr(opts, opt_opt)) == 0) {
+
+            if (opt_err)
+                HDfprintf(stderr, "%s: unknown option \"%c\"\n",
+                        argv[0], opt_opt);
+
+            /* if no chars left in this token, move to next token */
+            if (argv[opt_ind][++sp] == '\0') {
+                opt_ind++;
+                sp = 1;
+            }
+
+            return '?';
+        }
+
+        if (*++cp == ':') {
+            /* if a value is expected, get it */
+            if (argv[opt_ind][sp + 1] != '\0') {
+                /* flag value is rest of current token */
+                opt_arg = &argv[opt_ind++][sp + 1];
+            } else if (++opt_ind >= argc) {
+                if (opt_err)
+                    HDfprintf(stderr,
+                            "%s: value expected for option \"%c\"\n",
+                            argv[0], opt_opt);
+
+                opt_opt = '?';
+            } else {
+                /* flag value is next token */
+                opt_arg = argv[opt_ind++];
+            }
+
+            sp = 1;
+        } else {
+            /* set up to look at next char in token, next time */
+            if (argv[opt_ind][++sp] == '\0') {
+                /* no more in current token, so setup next token */
+                opt_ind++;
+                sp = 1;
+            }
+
+            opt_arg = NULL;
+        }
+    }
+
+    /* return the current flag character found */
+    return opt_opt;
+}
+
+
+void
+print_version(const char *progname)
+{
+    printf("%s: Version %u.%u.%u%s%s\n",
+           progname, H5_VERS_MAJOR, H5_VERS_MINOR, H5_VERS_RELEASE,
+           H5_VERS_SUBRELEASE[0] ? "-" : "", H5_VERS_SUBRELEASE);
+}
+
+
+
+/** From h5test.c **/
+
+#ifdef H5_HAVE_PARALLEL
+MPI_Info    h5_io_info_g=MPI_INFO_NULL;/* MPI INFO object for IO */
+#endif
+
+int
+h5_set_info_object(void)
+{
+    char	*envp;			/* environment pointer */
+    int		ret_value=0;
+
+    /* handle any MPI INFO hints via $HDF5_MPI_INFO */
+    if ((envp = getenv("HDF5_MPI_INFO")) != NULL){
+        char *next, *valp;
+
+
+        valp = envp = next = HDstrdup(envp);
+
+        /* create an INFO object if not created yet */
+        if (h5_io_info_g == MPI_INFO_NULL)
+            MPI_Info_create(&h5_io_info_g);
+
+        do {
+            size_t len;
+            char *key_val, *endp, *namep;
+
+            if (*valp == ';')
+                valp++;
+
+            /* copy key/value pair into temporary buffer */
+            len = strcspn(valp, ";");
+            next = &valp[len];
+            key_val = calloc(1, len + 1);
+
+            /* increment the next pointer past the terminating semicolon */
+            if (*next == ';')
+                ++next;
+
+            namep = HDstrncpy(key_val, valp, len);
+
+            /* pass up any beginning whitespaces */
+            while (*namep && (*namep == ' ' || *namep == '\t'))
+                namep++;
+
+            /* eat up any ending white spaces */
+            endp = &namep[strlen(namep) - 1];
+
+            while (endp && (*endp == ' ' || *endp == '\t'))
+                *endp-- = '\0';
+
+            /* find the '=' */
+
+            valp = HDstrchr(namep, '=');
+
+            if (valp != NULL) {     /* it's a valid key/value pairing */
+                char *tmp_val = valp + 1;
+
+                /* change '=' to \0, move valp down one */
+                *valp-- = '\0';
+
+                /* eat up ending whitespace on the "key" part */
+                while (*valp == ' ' || *valp == '\t')
+                    *valp-- = '\0';
+
+                valp = tmp_val;
+
+                /* eat up beginning whitespace on the "value" part */
+                while (*valp == ' ' || *valp == '\t')
+                    *valp++ = '\0';
+
+                /* actually set the darned thing */
+                if (MPI_SUCCESS != MPI_Info_set(h5_io_info_g, namep, valp)) {
+                    printf("MPI_Info_set failed\n");
+                    ret_value = -1;
+                }
+            }
+
+            valp = next;
+            HDfree(key_val);
+        } while (next && *next);
+
+        HDfree(envp);
+    }
+
+    return ret_value;
+}
+
+
+void
+h5_dump_info_object(MPI_Info info)
+{
+    char	key[MPI_MAX_INFO_KEY+1];
+    char	value[MPI_MAX_INFO_VAL+1];
+    int  	flag;
+    int		i, nkeys;
+
+    printf("Dumping MPI Info Object(%d) (up to %d bytes per item):\n", (int)info,
+	MPI_MAX_INFO_VAL);
+    if (info==MPI_INFO_NULL){
+	printf("object is MPI_INFO_NULL\n");
+    }
+    else {
+	MPI_Info_get_nkeys(info, &nkeys);
+	printf("object has %d items\n", nkeys);
+	for (i=0; i<nkeys; i++){
+	    MPI_Info_get_nthkey(info, i, key);
+	    MPI_Info_get(info, key, MPI_MAX_INFO_VAL, value, &flag);
+	    printf("%s=%s\n", key, value);
+	}
+
+    }
+}
diff --git a/tools/perform/pio_standalone.h b/tools/perform/pio_standalone.h
new file mode 100644
index 0000000..584a057
--- /dev/null
+++ b/tools/perform/pio_standalone.h
@@ -0,0 +1,157 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef PIO_STANDALONE_H__
+#define PIO_PERF_H__
+
+/* Header file for building h5perf by standalone mode.
+ * Created: Christian Chilan, 2005/5/18.
+ */
+
+/** From H5private.h **/
+
+#include "H5public.h"    /* Include Public Definitions    */
+
+
+/*
+ * Include ANSI-C header files.
+ */
+#ifdef H5_STDC_HEADERS
+#   include <assert.h>
+#   include <ctype.h>
+#   include <errno.h>
+#   include <fcntl.h>
+#   include <float.h>
+#   include <limits.h>
+#   include <math.h>
+#   include <signal.h>
+#   include <stdarg.h>
+#   include <stdio.h>
+#   include <stdlib.h>
+#   include <string.h>
+#endif
+
+/*
+ * And now for a couple non-Posix functions...  Watch out for systems that
+ * define these in terms of macros.
+ */
+#ifdef H5_HAVE_WIN32_API
+#define HDstrdup(S)       _strdup(S)
+#else /* H5_HAVE_WIN32_API */
+
+#if !defined strdup && !defined H5_HAVE_STRDUP
+extern char *strdup(const char *s);
+#endif
+
+#define HDstrdup(S)      strdup(S)
+
+#endif /* H5_HAVE_WIN32_API */
+
+H5_DLL int HDfprintf (FILE *stream, const char *fmt, ...);
+#define HDstrcmp(S,T)    strcmp(S,T)
+#define HDstrlen(S)    strlen(S)
+#define HDstrncmp(S,T,L)  strncmp(S,T,L)
+#define HDstrncpy(X,Y,Z)  strncpy(X,Y,Z)
+#define HDstrchr(S,C)    strchr(S,C)
+#define HDfree(M)    free(M)
+
+
+#ifdef _O_BINARY
+#define HDopen(S,F,M)    open(S,F|_O_BINARY,M)
+#else
+#define HDopen(S,F,M)    open(S,F,M)
+#endif
+#define HDclose(F)    close(F)
+
+#ifdef H5_HAVE_WIN32_API
+#define HDlseek(F,O,W)    _lseeki64(F,O,W)
+#else
+#define HDlseek(F,O,W)    lseek(F,O,W)
+#endif
+
+#define HDwrite(F,M,Z)    write(F,M,Z)
+
+#define HDread(F,M,Z)    read(F,M,Z)
+
+#ifdef H5_HAVE_WIN32_API
+     #define HDstat(S,B)  _stati64(S,B)
+#else
+#define HDstat(S,B)  stat(S,B)
+#endif
+
+#ifdef H5_HAVE_WIN32_API
+#define HDfstat(F,B)    _fstati64(F,B)
+typedef struct _stati64    h5_stat_t;
+typedef __int64              h5_stat_size_t;
+#else
+#define HDfstat(F,B)            fstat(F,B)
+typedef struct stat    h5_stat_t;
+typedef off_t                   h5_stat_size_t;
+#endif
+
+/*
+ * HDF Boolean type.
+ */
+#ifndef FALSE
+#   define FALSE 0
+#endif
+#ifndef TRUE
+#   define TRUE 1
+#endif
+
+
+/** From h5test.h **/
+
+#ifdef H5_HAVE_PARALLEL
+extern MPI_Info h5_io_info_g;         /* MPI INFO object for IO */
+#endif
+
+#ifdef H5_HAVE_PARALLEL
+H5TEST_DLL int h5_set_info_object(void);
+H5TEST_DLL void h5_dump_info_object(MPI_Info info);
+#endif
+
+
+
+/** From h5tools_utils.h **/
+
+extern int         opt_err;     /* getoption prints errors if this is on    */
+extern int         opt_ind;     /* token pointer                            */
+extern const char *opt_arg;     /* flag argument (or value)                 */
+
+
+enum {
+    no_arg = 0,         /* doesn't take an argument     */
+    require_arg,        /* requires an argument          */
+    optional_arg        /* argument is optional         */
+};
+
+
+typedef struct long_options {
+    const char  *name;          /* name of the long option              */
+    int          has_arg;       /* whether we should look for an arg    */
+    char         shortval;      /* the shortname equivalent of long arg
+                                 * this gets returned from get_option   */
+} long_options;
+
+extern int    get_option(int argc, const char **argv, const char *opt,
+                         const struct long_options *l_opt);
+
+extern int     nCols;               /*max number of columns for outputting  */
+
+/* Definitions of useful routines */
+extern void     print_version(const char *progname);
+
+#endif
diff --git a/tools/perform/pio_timer.c b/tools/perform/pio_timer.c
new file mode 100644
index 0000000..aba219e
--- /dev/null
+++ b/tools/perform/pio_timer.c
@@ -0,0 +1,258 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Purpose:
+ *
+ * This is a module of useful timing functions for performance testing.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "hdf5.h"
+
+#ifdef H5_HAVE_PARALLEL
+
+#include <mpi.h>
+
+#include "pio_perf.h"
+
+/*
+ * The number to divide the tv_usec field with to get a nice decimal to add to
+ * the number of seconds.
+ */
+#define MICROSECOND     1000000.0
+
+/* global variables */
+pio_time   *timer_g;            /* timer: global for stub functions     */
+
+/*
+ * Function:  sub_time
+ * Purpose:   Struct two time values, and return the difference, in microseconds
+ *
+ *         Note that the function assumes that a > b
+ * Programmer: Leon Arber, 1/27/06
+ */
+static double sub_time(struct timeval* a, struct timeval* b)
+{
+    return (((double)a->tv_sec +
+     ((double)a->tv_usec) / MICROSECOND) -
+  ((double)b->tv_sec +
+   ((double)b->tv_usec) / MICROSECOND));
+}
+
+
+/*
+ * Function:    pio_time_new
+ * Purpose:     Build us a brand, spankin', new performance time object.
+ *              The object is a black box to the user. They just tell us
+ *              what type of timer they want (MPI_TIMER for MPI_Wtime or
+ *              SYS_TIMER for system time).
+ * Return:      Pointer to pio_time object
+ * Programmer:  Bill Wendling, 01. October 2001
+ * Modifications:
+ */
+pio_time *
+pio_time_new(clock_type type)
+{
+    pio_time *pt = (pio_time *)calloc(1, sizeof(struct pio_time_));
+
+    /* set global timer variable */
+    timer_g = pt;
+
+    pt->type = type;
+    return pt;
+}
+
+/*
+ * Function:    pio_time_destroy
+ * Purpose:     Remove the memory allocated for the pio_time object. Only
+ *              need to call on a pointer allocated with the ``pio_time_new''
+ *              function.
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 01. October 2001
+ * Modifications:
+ */
+void
+pio_time_destroy(pio_time *pt)
+{
+    HDfree(pt);
+    /* reset the global timer pointer too. */
+    timer_g = NULL;
+}
+
+/*
+ * Function:    set_timer_type
+ * Purpose:     Set the type of the timer to either MPI_TIMER or SYS_TIMER.
+ *              This really only needs to be called if you didn't construct a
+ *              timer with the pio_timer_new function (shame!).
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 04. October 2001
+ * Modifications:
+ */
+void
+set_timer_type(pio_time *pt, clock_type type)
+{
+    pt->type = type;
+}
+
+/*
+ * Function:    get_timer_type
+ * Purpose:     Get the type of the timer.
+ * Return:      MPI_TIMER or SYS_TIMER.
+ * Programmer:  Bill Wendling, 04. October 2001
+ * Modifications:
+ */
+clock_type
+get_timer_type(pio_time *pt)
+{
+    return pt->type;
+}
+
+/*
+ * Function:    set_time
+ * Purpose:     Set the time in a ``pio_time'' object.
+ * Return:      Pointer to the passed in ``pio_time'' object.
+ * Programmer:  Bill Wendling, 01. October 2001
+ * Modifications:
+ */
+pio_time *
+set_time(pio_time *pt, timer_type t, int start_stop)
+{
+    if (pt) {
+        if (pt->type == MPI_TIMER) {
+            if (start_stop == TSTART) {
+                pt->mpi_timer[t] = MPI_Wtime();
+
+    /* When we start the timer for HDF5_FINE_WRITE_FIXED_DIMS or HDF5_FINE_READ_FIXED_DIMS
+     * we compute the time it took to only open the file */
+    if(t == HDF5_FINE_WRITE_FIXED_DIMS)
+        pt->total_time[HDF5_FILE_WRITE_OPEN] += pt->mpi_timer[t] - pt->mpi_timer[HDF5_GROSS_WRITE_FIXED_DIMS];
+    else if(t == HDF5_FINE_READ_FIXED_DIMS)
+        pt->total_time[HDF5_FILE_READ_OPEN] += pt->mpi_timer[t] - pt->mpi_timer[HDF5_GROSS_READ_FIXED_DIMS];
+
+            } else {
+                pt->total_time[t] += MPI_Wtime() - pt->mpi_timer[t];
+    pt->mpi_timer[t] = MPI_Wtime();
+
+    /* When we stop the timer for HDF5_GROSS_WRITE_FIXED_DIMS or HDF5_GROSS_READ_FIXED_DIMS
+     * we compute the time it took to close the file after the last read/write finished */
+    if(t == HDF5_GROSS_WRITE_FIXED_DIMS)
+        pt->total_time[HDF5_FILE_WRITE_CLOSE] += pt->mpi_timer[t] - pt->mpi_timer[HDF5_FINE_WRITE_FIXED_DIMS];
+    else if(t == HDF5_GROSS_READ_FIXED_DIMS)
+        pt->total_time[HDF5_FILE_READ_CLOSE] += pt->mpi_timer[t] - pt->mpi_timer[HDF5_FINE_READ_FIXED_DIMS];
+            }
+        } else {
+            if (start_stop == TSTART) {
+                HDgettimeofday(&pt->sys_timer[t], NULL);
+
+    /* When we start the timer for HDF5_FINE_WRITE_FIXED_DIMS or HDF5_FINE_READ_FIXED_DIMS
+     * we compute the time it took to only open the file */
+    if(t == HDF5_FINE_WRITE_FIXED_DIMS)
+        pt->total_time[HDF5_FILE_WRITE_OPEN] += sub_time(&(pt->sys_timer[t]), &(pt->sys_timer[HDF5_GROSS_WRITE_FIXED_DIMS]));
+    else if(t == HDF5_FINE_READ_FIXED_DIMS)
+        pt->total_time[HDF5_FILE_READ_OPEN] += sub_time(&(pt->sys_timer[t]), &(pt->sys_timer[HDF5_GROSS_READ_FIXED_DIMS]));
+
+
+            } else {
+                struct timeval sys_t;
+
+                HDgettimeofday(&sys_t, NULL);
+                pt->total_time[t] += sub_time(&sys_t, &(pt->sys_timer[t]));
+
+/*                    ((double)sys_t.tv_sec +
+                                ((double)sys_t.tv_usec) / MICROSECOND) -
+                    ((double)pt->sys_timer[t].tv_sec +
+                            ((double)pt->sys_timer[t].tv_usec) / MICROSECOND);*/
+
+    /* When we stop the timer for HDF5_GROSS_WRITE_FIXED_DIMS or HDF5_GROSS_READ_FIXED_DIMS
+     * we compute the time it took to close the file after the last read/write finished */
+    if(t == HDF5_GROSS_WRITE_FIXED_DIMS)
+        pt->total_time[HDF5_FILE_WRITE_CLOSE] += sub_time(&(pt->sys_timer[t]), &(pt->sys_timer[HDF5_FINE_WRITE_FIXED_DIMS]));
+    else if(t == HDF5_GROSS_READ_FIXED_DIMS)
+        pt->total_time[HDF5_FILE_READ_CLOSE] += sub_time(&(pt->sys_timer[t]), &(pt->sys_timer[HDF5_FINE_READ_FIXED_DIMS]));
+
+            }
+        }
+
+        if (pio_debug_level >= 4) {
+            const char *msg;
+            int myrank;
+
+            MPI_Comm_rank(pio_comm_g, &myrank);
+
+            switch (t) {
+            case HDF5_FILE_OPENCLOSE:
+                msg = "File Open/Close";
+                break;
+            case HDF5_DATASET_CREATE:
+                msg = "Dataset Create";
+                break;
+            case HDF5_MPI_WRITE:
+                msg = "MPI Write";
+                break;
+            case HDF5_MPI_READ:
+                msg = "MPI Read";
+                break;
+            case HDF5_FINE_WRITE_FIXED_DIMS:
+                msg = "Fine Write";
+                break;
+            case HDF5_FINE_READ_FIXED_DIMS:
+                msg = "Fine Read";
+                break;
+            case HDF5_GROSS_WRITE_FIXED_DIMS:
+                msg = "Gross Write";
+                break;
+            case HDF5_GROSS_READ_FIXED_DIMS:
+                msg = "Gross Read";
+                break;
+            case HDF5_RAW_WRITE_FIXED_DIMS:
+                msg = "Raw Write";
+                break;
+            case HDF5_RAW_READ_FIXED_DIMS:
+                msg = "Raw Read";
+                break;
+            default:
+                msg = "Unknown Timer";
+                break;
+            }
+
+            fprintf(output, "    Proc %d: %s %s: %.2f\n", myrank, msg,
+                    (start_stop == TSTART ? "Start" : "Stop"),
+                    pt->total_time[t]);
+        }
+    }
+
+    return pt;
+}
+
+/*
+ * Function:    get_time
+ * Purpose:     Get the time from a ``pio_time'' object.
+ * Return:      The number of seconds as a DOUBLE.
+ * Programmer:  Bill Wendling, 01. October 2001
+ * Modifications:
+ */
+double
+get_time(pio_time *pt, timer_type t)
+{
+    return pt->total_time[t];
+}
+
+#endif /* H5_HAVE_PARALLEL */
+#ifdef STANDALONE
+#include "pio_standalone.c"
+#endif
diff --git a/tools/perform/pio_timer.h b/tools/perform/pio_timer.h
new file mode 100644
index 0000000..a5ee6d7
--- /dev/null
+++ b/tools/perform/pio_timer.h
@@ -0,0 +1,82 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef PIO_TIMER__
+#define PIO_TIMER__
+
+#include "hdf5.h"
+
+#if defined(H5_TIME_WITH_SYS_TIME)
+#   include <sys/time.h>
+#   include <time.h>
+#elif defined(H5_HAVE_SYS_TIME_H)
+#   include <sys/time.h>
+#else
+#   include <time.h>
+#endif
+
+/* The different types of timers we can have */
+typedef enum timer_type_ {
+    HDF5_FILE_OPENCLOSE,
+    HDF5_DATASET_CREATE,
+    HDF5_MPI_WRITE,
+    HDF5_MPI_READ,
+    HDF5_FILE_READ_OPEN,
+    HDF5_FILE_READ_CLOSE,
+    HDF5_FILE_WRITE_OPEN,
+    HDF5_FILE_WRITE_CLOSE,
+    HDF5_FINE_WRITE_FIXED_DIMS,
+    HDF5_FINE_READ_FIXED_DIMS,
+    HDF5_GROSS_WRITE_FIXED_DIMS,
+    HDF5_GROSS_READ_FIXED_DIMS,
+    HDF5_RAW_WRITE_FIXED_DIMS,
+    HDF5_RAW_READ_FIXED_DIMS,
+    NUM_TIMERS
+} timer_type;
+
+typedef enum clock_type_ {
+    MPI_TIMER = 0,  /* Use MPI timer to measure time        */
+    SYS_TIMER = 1   /* Use system clock to measure time     */
+} clock_type;
+
+/* Miscellaneous identifiers */
+enum {
+    TSTART,          /* Start a specified timer              */
+    TSTOP            /* Stop a specified timer               */
+};
+
+/* The performance time structure */
+typedef struct pio_time_ {
+    clock_type type;
+    double total_time[NUM_TIMERS];
+    double mpi_timer[NUM_TIMERS];
+    struct timeval sys_timer[NUM_TIMERS];
+} pio_time;
+
+/* External function declarations */
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+extern pio_time    *pio_time_new(clock_type t);
+extern void         pio_time_destroy(pio_time *pt);
+extern void         set_timer_type(pio_time *pt, clock_type type);
+extern clock_type   get_timer_type(pio_time *pt);
+extern pio_time    *set_time(pio_time *pt, timer_type t, int start_stop);
+extern double       get_time(pio_time *pt, timer_type t);
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
+#endif  /* PIO_TIMER__ */
diff --git a/tools/perform/sio_engine.c b/tools/perform/sio_engine.c
new file mode 100644
index 0000000..07e6b16c
--- /dev/null
+++ b/tools/perform/sio_engine.c
@@ -0,0 +1,1310 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Author: Christian Chilan, April 2008
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#ifdef H5_HAVE_UNISTD_H
+#  include <unistd.h>
+#endif
+#include <errno.h>
+
+#include "hdf5.h"
+
+#include "sio_perf.h"
+#include "sio_timer.h"
+
+/* Macro definitions */
+
+/* sizes of various items. these sizes won't change during program execution */
+#define ELMT_H5_TYPE        H5T_NATIVE_UCHAR
+
+#define GOTOERROR(errcode)  { ret_code = errcode; goto done; }
+#define ERRMSG(mesg) {                                                  \
+    fprintf(stderr, "*** Assertion failed (%s) at line %4d in %s\n",    \
+        mesg, (int)__LINE__, __FILE__);                             \
+}
+
+/* verify: if val is false (0), print mesg. */
+#define VRFY(val, mesg) do {                            \
+    if (!val) {                                         \
+    ERRMSG(mesg);                                   \
+    GOTOERROR(FAIL);                                \
+    }                                                   \
+} while(0)
+
+/* POSIX I/O macros */
+#define POSIXCREATE(fn)           HDopen(fn, O_CREAT|O_TRUNC|O_RDWR, 0600)
+#define POSIXOPEN(fn, F)          HDopen(fn, F, 0600)
+#define POSIXCLOSE(F)             HDclose(F)
+#define POSIXSEEK(F,L)            HDlseek(F, L, SEEK_SET)
+#define POSIXWRITE(F,B,S)         HDwrite(F,B,S)
+#define POSIXREAD(F,B,S)          HDread(F,B,S)
+
+enum {
+    SIO_CREATE = 1,
+    SIO_WRITE = 2,
+    SIO_READ = 4
+};
+
+/* Global variables */
+static int  clean_file_g = -1;  /*whether to cleanup temporary test     */
+/*files. -1 is not defined;             */
+/*0 is no cleanup; 1 is do cleanup      */
+
+/* the different types of file descriptors we can expect */
+typedef union _file_descr {
+    int         posixfd;    /* POSIX file handle*/
+    hid_t       h5fd;       /* HDF5 file        */
+} file_descr;
+
+/* local functions */
+static char  *sio_create_filename(iotype iot, const char *base_name,
+    char *fullname, size_t size, parameters *param);
+static herr_t do_write(results *res, file_descr *fd, parameters *parms, void *buffer);
+static herr_t do_read(results *res, file_descr *fd, parameters *parms, void *buffer);
+static herr_t dset_write(int local_dim, file_descr *fd, parameters *parms, void *buffer);
+static herr_t posix_buffer_write(int local_dim, file_descr *fd, parameters *parms, void *buffer);
+static herr_t dset_read(int localrank, file_descr *fd, parameters *parms, void *buffer, const char *buffer2);
+static herr_t posix_buffer_read(int local_dim, file_descr *fd, parameters *parms, void *buffer);
+static herr_t do_fopen(parameters *param, char *fname, file_descr *fd /*out*/,
+    int flags);
+hid_t set_vfd(parameters *param);
+static herr_t do_fclose(iotype iot, file_descr *fd);
+static void do_cleanupfile(iotype iot, char *fname);
+
+/* global variables */
+static off_t offset[MAX_DIMS];       /* dataset size in bytes     */
+static size_t buf_offset[MAX_DIMS];   /* dataset size in bytes     */
+static int order[MAX_DIMS];        /* dimension access order */
+static size_t      linear_buf_size;        /* linear buffer size     */
+static int         cont_dim;       /* lowest dimension for contiguous POSIX
+                                      access */
+static size_t      cont_size;      /* size of contiguous POSIX access */
+static hid_t       fapl;           /* file access list */
+static unsigned char *buf_p;       /* buffer pointer */
+static const char *multi_letters = "msbrglo"; /* string for multi driver */
+
+/* HDF5 global variables */
+static hsize_t     h5count[MAX_DIMS];      /*selection count               */
+static hssize_t    h5offset[MAX_DIMS];     /* Selection offset within dataspace */
+static hid_t       h5dset_space_id = -1;   /*dataset space ID              */
+static hid_t       h5mem_space_id = -1;    /*memory dataspace ID           */
+static hid_t       h5ds_id = -1;           /*dataset handle                */
+static hid_t       h5dcpl = -1;            /* Dataset creation property list */
+static hid_t       h5dxpl = -1;            /* Dataset transfer property list */
+
+/*
+ * Function:        do_sio
+ * Purpose:         SIO Engine where IO are executed.
+ * Return:          results
+ * Programmer:      Christian Chilan, April, 2008
+ * Modifications:
+ */
+    results
+do_sio(parameters param)
+{
+    char       *buffer = NULL; /*data buffer pointer           */
+    size_t      buf_size[MAX_DIMS];     /* general buffer size in bytes     */
+    file_descr  fd;                     /* file handles */
+    iotype      iot;                    /* API type */
+    char base_name[256];                /* test file base name */
+    /* return codes */
+    herr_t      ret_code = 0;   /*return code                           */
+    results     res;
+
+    char        fname[FILENAME_MAX];    /* test file name */
+    int     i;
+    /* HDF5 variables */
+    herr_t          hrc;        /*HDF5 return code              */
+
+    /* Sanity check parameters */
+
+    /* IO type */
+    iot = param.io_type;
+
+    switch (iot) {
+    case POSIXIO:
+        fd.posixfd = -1;
+        res.timers = sio_time_new();
+        break;
+    case HDF5:
+        fd.h5fd = -1;
+        res.timers = sio_time_new();
+        break;
+    default:
+        /* unknown request */
+        HDfprintf(stderr, "Unknown IO type request (%d)\n", (int)iot);
+        GOTOERROR(FAIL);
+    }
+
+    linear_buf_size = 1;
+
+    for (i=0; i<param.rank; i++){
+        buf_size[i] = param.buf_size[i];
+        order[i] = param.order[i];
+        linear_buf_size *= buf_size[i];
+        buf_offset[i] = 0;
+        offset[i] = 0;
+
+        /* Validate transfer buffer size */
+        if (param.buf_size[i]<=0) {
+            HDfprintf(stderr,
+            "Transfer buffer size[%d] (%zu) must be > 0\n", i,buf_size[i]);
+            GOTOERROR(FAIL);
+        }
+
+        if ((param.dset_size[i]%param.buf_size[i])!=0) {
+            HDfprintf(stderr,
+            "Dataset size[%d] (%" H5_PRINTF_LL_WIDTH "d) must be a multiple of the "
+            "trasfer buffer size[%d] (%zu)\n",param.rank,
+            (long long)param.dset_size[i], param.rank, param.buf_size[i]);
+            GOTOERROR(FAIL);
+        }
+
+    }
+
+    /* Allocate transfer buffer */
+    if ((buffer = malloc(linear_buf_size)) == NULL){
+        HDfprintf(stderr, "malloc for transfer buffer size (%zu) failed\n", linear_buf_size);
+        GOTOERROR(FAIL);
+    }
+
+    if (sio_debug_level >= 4)
+
+    /* output all of the times for all iterations */
+        fprintf(output, "Timer details:\n");
+
+    /*
+     * Write performance measurement
+     */
+    /* Open file for write */
+
+    HDstrcpy(base_name, "#sio_tmp");
+    sio_create_filename(iot, base_name, fname, sizeof(fname), &param);
+
+    if (sio_debug_level > 0)
+        HDfprintf(output, "data filename=%s\n",
+             fname);
+
+    set_time(res.timers, HDF5_GROSS_WRITE_FIXED_DIMS, TSTART);
+    hrc = do_fopen(&param, fname, &fd, SIO_CREATE | SIO_WRITE);
+    VRFY((hrc == SUCCESS), "do_fopen failed");
+
+    set_time(res.timers, HDF5_FINE_WRITE_FIXED_DIMS, TSTART);
+    hrc = do_write(&res, &fd, &param, buffer);
+    set_time(res.timers, HDF5_FINE_WRITE_FIXED_DIMS, TSTOP);
+    VRFY((hrc == SUCCESS), "do_write failed");
+
+    /* Close file for write */
+    hrc = do_fclose(iot, &fd);
+    set_time(res.timers, HDF5_GROSS_WRITE_FIXED_DIMS, TSTOP);
+    VRFY((hrc == SUCCESS), "do_fclose failed");
+
+    if (!param.h5_write_only) {
+        /*
+         * Read performance measurement
+         */
+
+        /* Open file for read */
+        set_time(res.timers, HDF5_GROSS_READ_FIXED_DIMS, TSTART);
+        hrc = do_fopen(&param, fname, &fd, SIO_READ);
+        VRFY((hrc == SUCCESS), "do_fopen failed");
+
+        set_time(res.timers, HDF5_FINE_READ_FIXED_DIMS, TSTART);
+        hrc = do_read(&res, &fd, &param, buffer);
+        set_time(res.timers, HDF5_FINE_READ_FIXED_DIMS, TSTOP);
+        VRFY((hrc == SUCCESS), "do_read failed");
+
+        /* Close file for read */
+        hrc = do_fclose(iot, &fd);
+
+        set_time(res.timers, HDF5_GROSS_READ_FIXED_DIMS, TSTOP);
+        VRFY((hrc == SUCCESS), "do_fclose failed");
+    }
+
+    do_cleanupfile(iot, fname);
+
+done:
+    /* clean up */
+    /* release HDF5 objects */
+
+    /* close any opened files */
+    /* no remove(fname) because that should have happened normally. */
+    switch (iot) {
+        case POSIXIO:
+            if (fd.posixfd != -1)
+                hrc = do_fclose(iot, &fd);
+            break;
+        case HDF5:
+            if (fd.h5fd != -1)
+                hrc = do_fclose(iot, &fd);
+			break;
+        default:
+            /* unknown request */
+            HDassert(0 && "Unknown IO type");
+            break;
+    }
+
+    /* release generic resources */
+    if (buffer)
+        free(buffer);
+
+    res.ret_code = ret_code;
+    return res;
+}
+
+/*
+ * Function:    sio_create_filename
+ * Purpose:     Create a new filename to write to. Determine the correct
+ *              suffix to append to the filename by the type of I/O we're
+ *              doing. Also, place in the /tmp/{$USER,$LOGIN} directory if
+ *              USER or LOGIN are specified in the environment.
+ * Return:      Pointer to filename or NULL
+ * Programmer:  Bill Wendling, 21. November 2001
+ * Modifications: Support for file drivers. Christian Chilan, April, 2008
+ */
+    static char *
+sio_create_filename(iotype iot, const char *base_name, char *fullname, size_t size, parameters *param)
+{
+    const char *prefix, *suffix="";
+    char *ptr, last = '\0';
+    size_t i, j;
+    vfdtype vfd;
+    vfd = param->vfd;
+
+    if (!base_name || !fullname || size < 1)
+    return NULL;
+
+    memset(fullname, 0, size);
+
+    switch (iot) {
+    case POSIXIO:
+        suffix = ".posix";
+        break;
+    case HDF5:
+        suffix = ".h5";
+        if (vfd == family)
+            suffix = "%05d.h5";
+        else if (vfd == multi)
+            suffix = NULL;
+        break;
+    default:
+        /* unknown request */
+        HDfprintf(stderr, "Unknown IO type request (%d)\n", (int)iot);
+        HDassert(0 && "Unknown IO type");
+        break;
+    }
+
+    /* First use the environment variable and then try the constant */
+    prefix = HDgetenv("HDF5_PREFIX");
+
+#ifdef HDF5_PREFIX
+    if (!prefix)
+    prefix = HDF5_PREFIX;
+#endif  /* HDF5_PREFIX */
+
+    /* Prepend the prefix value to the base name */
+    if (prefix && *prefix) {
+    /* If the prefix specifies the HDF5_PREFIX directory, then
+     * default to using the "/tmp/$USER" or "/tmp/$LOGIN"
+     * directory instead. */
+    register char *user, *login, *subdir;
+
+    user = HDgetenv("USER");
+    login = HDgetenv("LOGIN");
+    subdir = (user ? user : login);
+
+    if (subdir) {
+        for (i = 0; i < size-1 && prefix[i]; i++)
+        fullname[i] = prefix[i];
+
+        fullname[i++] = '/';
+
+        for (j = 0; i < size && subdir[j]; i++, j++)
+        fullname[i] = subdir[j];
+    } else {
+        /* We didn't append the prefix yet */
+        HDstrncpy(fullname, prefix, size);
+        fullname[size - 1] = '\0';
+    }
+
+    if ((HDstrlen(fullname) + HDstrlen(base_name) + 1) < size) {
+        /* Append the base_name with a slash first. Multiple slashes are
+         * handled below. */
+        h5_stat_t buf;
+
+        if (HDstat(fullname, &buf) < 0)
+        /* The directory doesn't exist just yet */
+        if (HDmkdir(fullname, 0755) < 0 && errno != EEXIST) {
+            /* We couldn't make the "/tmp/${USER,LOGIN}" subdirectory.
+             * Default to PREFIX's original prefix value. */
+            HDstrcpy(fullname, prefix);
+        }
+
+        HDstrcat(fullname, "/");
+        HDstrcat(fullname, base_name);
+    } else {
+        /* Buffer is too small */
+        return NULL;
+    }
+    } else if (strlen(base_name) >= size) {
+    /* Buffer is too small */
+        return NULL;
+    } else {
+        HDstrcpy(fullname, base_name);
+    }
+
+    /* Append a suffix */
+    if (suffix) {
+        if (HDstrlen(fullname) + HDstrlen(suffix) >= size)
+            return NULL;
+
+        HDstrcat(fullname, suffix);
+    }
+
+    /* Remove any double slashes in the filename */
+    for (ptr = fullname, i = j = 0; ptr && (i < size); i++, ptr++) {
+        if (*ptr != '/' || last != '/')
+            fullname[j++] = *ptr;
+
+        last = *ptr;
+    }
+
+    return fullname;
+}
+
+/*
+ * Function:        do_write
+ * Purpose:         Write the required amount of data to the file.
+ * Return:          SUCCESS or FAIL
+ * Programmer:      Christian Chilan, April, 2008
+ * Modifications:
+ */
+static herr_t
+do_write(results *res, file_descr *fd, parameters *parms, void *buffer)
+{
+    int         ret_code = SUCCESS;
+    char        dname[64];
+    long        i;
+    /* HDF5 variables */
+    herr_t      hrc;                    /*HDF5 return code              */
+    hsize_t     h5dims[MAX_DIMS];       /*dataset dim sizes             */
+    hsize_t     h5chunk[MAX_DIMS];      /*dataset dim sizes             */
+    hsize_t     h5block[MAX_DIMS];      /*dataspace selection           */
+    hsize_t     h5stride[MAX_DIMS];     /*selection stride              */
+    hsize_t     h5start[MAX_DIMS];      /*selection start               */
+    hsize_t     h5maxdims[MAX_DIMS];
+    int         rank;                   /*rank of dataset */
+        /* Prepare buffer for verifying data */
+/*    if (parms->verify)
+            memset(buffer,1,linear_buf_size); */
+
+    buf_p=(unsigned char *)buffer;
+
+    for (i=0; i < linear_buf_size; i++)
+        buf_p[i]=i%128;
+
+    rank = parms->rank;
+
+    for (i=0; i<rank; i++) {
+        h5offset[i] = offset[i] = 0;
+    }
+
+    /* I/O Access specific setup */
+    switch (parms->io_type) {
+    case POSIXIO:
+
+            /* determine lowest dimension for contiguous POSIX access */
+            cont_dim = rank;
+
+            for (i=rank-1; i>=0; i--) {
+                if (parms->buf_size[i]==parms->dset_size[i])
+                    cont_dim = i;
+                else
+                    break;
+            }
+
+            /* determine size of the contiguous POSIX access */
+            cont_size = (!cont_dim)? 1 : parms->buf_size[cont_dim-1];
+            for (i=cont_dim; i<rank; i++)
+                cont_size *= parms->buf_size[i];
+
+        break;
+
+    case HDF5: /* HDF5 setup */
+
+        for (i=0; i < rank; i++){
+            h5dims[i] = parms->dset_size[i];
+            h5start[i] = 0;
+            h5stride[i] = 1;
+            h5block[i] = 1;
+            h5count[i] = parms->buf_size[i];
+            h5chunk[i] = parms->chk_size[i];
+            h5maxdims[i] = H5S_UNLIMITED;
+
+        }
+
+        if (parms->h5_use_chunks && parms->h5_extendable) {
+            h5dset_space_id = H5Screate_simple(rank, h5count, h5maxdims);
+            VRFY((h5dset_space_id >= 0), "H5Screate_simple");
+        }
+        else {
+            h5dset_space_id = H5Screate_simple(rank, h5dims, NULL);
+            VRFY((h5dset_space_id >= 0), "H5Screate_simple");
+        }
+
+        hrc = H5Sselect_hyperslab(h5dset_space_id, H5S_SELECT_SET,
+                    h5start, h5stride, h5count, h5block);
+        VRFY((hrc >= 0), "H5Sselect_hyperslab");
+
+        /* Create the memory dataspace that corresponds to the xfer buffer */
+        h5mem_space_id = H5Screate_simple(rank, h5count, NULL);
+        VRFY((h5mem_space_id >= 0), "H5Screate_simple");
+
+        /* Create the dataset transfer property list */
+        h5dxpl = H5Pcreate(H5P_DATASET_XFER);
+        if (h5dxpl < 0) {
+            fprintf(stderr, "HDF5 Property List Create failed\n");
+            GOTOERROR(FAIL);
+        }
+
+        break;
+
+    default:
+        HDfprintf(stderr, "Unknown IO type request (%d)\n", (int)parms->io_type);
+        GOTOERROR(FAIL);
+        break;
+    } /* end switch */
+
+
+    /* create dataset */
+    switch (parms->io_type) {
+        case POSIXIO:
+        break;
+
+        case HDF5:
+            h5dcpl = H5Pcreate(H5P_DATASET_CREATE);
+
+        if (h5dcpl < 0) {
+            fprintf(stderr, "HDF5 Property List Create failed\n");
+            GOTOERROR(FAIL);
+        }
+
+        if(parms->h5_use_chunks) {
+        /* Set the chunk size to be the same as the buffer size */
+            hrc = H5Pset_chunk(h5dcpl, rank, h5chunk);
+            if (hrc < 0) {
+                fprintf(stderr, "HDF5 Property List Set failed\n");
+                GOTOERROR(FAIL);
+            } /* end if */
+        } /* end if */
+
+        sprintf(dname, "Dataset_%ld", (unsigned long)parms->num_bytes);
+        h5ds_id = H5Dcreate2(fd->h5fd, dname, ELMT_H5_TYPE,
+            h5dset_space_id, H5P_DEFAULT, h5dcpl, H5P_DEFAULT);
+
+        if (h5ds_id < 0) {
+            HDfprintf(stderr, "HDF5 Dataset Create failed\n");
+            GOTOERROR(FAIL);
+        }
+
+        hrc = H5Pclose(h5dcpl);
+        /* verifying the close of the dcpl */
+        if (hrc < 0) {
+            HDfprintf(stderr, "HDF5 Property List Close failed\n");
+            GOTOERROR(FAIL);
+        }
+        break;
+
+        default:
+        /* unknown request */
+        HDfprintf(stderr, "Unknown IO type request (%d)\n", (int)parms->io_type);
+        GOTOERROR(FAIL);
+        break;
+    }
+
+    /* Start "raw data" write timer */
+    set_time(res->timers, HDF5_RAW_WRITE_FIXED_DIMS, TSTART);
+
+    /* Perform write */
+    hrc = dset_write(rank-1, fd, parms, buffer);
+
+    if (hrc < 0) {
+        fprintf(stderr, "Error in dataset write\n");
+        GOTOERROR(FAIL);
+    }
+
+
+    /* Stop "raw data" write timer */
+    set_time(res->timers, HDF5_RAW_WRITE_FIXED_DIMS, TSTOP);
+
+    /* Calculate write time */
+
+    /* Close dataset. Only HDF5 needs to do an explicit close. */
+    if (parms->io_type == HDF5) {
+        hrc = H5Dclose(h5ds_id);
+
+        if (hrc < 0) {
+            fprintf(stderr, "HDF5 Dataset Close failed\n");
+            GOTOERROR(FAIL);
+        }
+
+        h5ds_id = -1;
+    } /* end if */
+
+done:
+
+    /* release HDF5 objects */
+    if (h5dset_space_id != -1) {
+        hrc = H5Sclose(h5dset_space_id);
+        if (hrc < 0){
+            fprintf(stderr, "HDF5 Dataset Space Close failed\n");
+            ret_code = FAIL;
+        } else {
+            h5dset_space_id = -1;
+        }
+    }
+
+    if (h5mem_space_id != -1) {
+        hrc = H5Sclose(h5mem_space_id);
+        if (hrc < 0) {
+            fprintf(stderr, "HDF5 Memory Space Close failed\n");
+            ret_code = FAIL;
+        } else {
+            h5mem_space_id = -1;
+        }
+    }
+
+    if (h5dxpl != -1) {
+        hrc = H5Pclose(h5dxpl);
+        if (hrc < 0) {
+            fprintf(stderr, "HDF5 Dataset Transfer Property List Close failed\n");
+            ret_code = FAIL;
+        } else {
+            h5dxpl = -1;
+        }
+    }
+
+    return ret_code;
+}
+
+/*
+ * Function:        dset_write
+ * Purpose:         Write buffer into the dataset.
+ * Return:          SUCCESS or FAIL
+ * Programmer:      Christian Chilan, April, 2008
+ * Modifications:
+ */
+
+static herr_t dset_write(int local_dim, file_descr *fd, parameters *parms, void *buffer)
+{
+    int cur_dim = order[local_dim]-1;
+    int         ret_code = SUCCESS;
+    int         k;
+    hsize_t  dims[MAX_DIMS], maxdims[MAX_DIMS];
+    long i,j;
+    herr_t hrc;
+
+    /* iterates according to the dimensions in order array */
+    for (i=0; i < parms->dset_size[cur_dim]; i += parms->buf_size[cur_dim]){
+
+        h5offset[cur_dim] = offset[cur_dim] = i;
+
+        if (local_dim > 0){
+
+            dset_write(local_dim-1, fd, parms, buffer);
+
+        }else{
+
+            switch (parms->io_type) {
+
+            case POSIXIO:
+                /* initialize POSIX offset in the buffer */
+                for (j=0; j < parms->rank; j++) {
+                    buf_offset[j]=0;
+                }
+                buf_p = (unsigned char *)buffer;
+                /* write POSIX buffer */
+                posix_buffer_write(0, fd, parms, buffer);
+                break;
+
+            case HDF5:
+                /* if dimensions are extendable, extend them as needed during
+                access */
+                if (parms->h5_use_chunks && parms->h5_extendable) {
+
+                    hrc=H5Sget_simple_extent_dims(h5dset_space_id,dims,maxdims);
+                    VRFY((hrc >= 0), "H5Sget_simple_extent_dims");
+
+                    for (k=0; k < parms->rank; k++){
+
+                        if (dims[k] <= h5offset[k]) {
+                            dims[k] = dims[k]+h5count[k];
+                            hrc=H5Sset_extent_simple(h5dset_space_id,parms->rank,dims,maxdims);
+                            VRFY((hrc >= 0), "H5Sset_extent_simple");
+                            hrc=H5Dset_extent(h5ds_id,dims);
+                            VRFY((hrc >= 0), "H5Dextend");
+                        }
+                    }
+                }
+                /* applies offset */
+                hrc = H5Soffset_simple(h5dset_space_id, h5offset);
+                VRFY((hrc >= 0), "H5Soffset_simple");
+
+                /* Write the buffer out */
+                hrc=H5Sget_simple_extent_dims(h5dset_space_id,dims,maxdims);
+                hrc = H5Dwrite(h5ds_id, ELMT_H5_TYPE, h5mem_space_id,
+                    h5dset_space_id, h5dxpl, buffer);
+                VRFY((hrc >= 0), "H5Dwrite");
+
+                break;
+				
+            default:
+                /* unknown request */
+                HDfprintf(stderr, "Unknown IO type request (%d)\n", (int)parms->io_type);
+                HDassert(0 && "Unknown IO type");
+                break;
+            } /* switch (parms->io_type) */
+        }
+    }
+done:
+    return ret_code;
+}
+
+/*
+ * Function:        posix_buffer_write
+ * Purpose:         Write buffer into the POSIX file considering contiguity.
+ * Return:          SUCCESS or FAIL
+ * Programmer:      Christian Chilan, April, 2008
+ * Modifications:
+ */
+
+static herr_t posix_buffer_write(int local_dim, file_descr *fd, parameters *parms, void *buffer)
+{
+    int dtype_size = 1;
+    int         ret_code = SUCCESS;
+    long i;
+    size_t d_offset;
+    size_t linear_dset_offset = 0;
+    int j, rc;
+
+    /* if dimension is not contiguous, call recursively */
+    if (local_dim < parms->rank-1 && local_dim != cont_dim) {
+
+        for (i=0; i < parms->buf_size[local_dim]; i += dtype_size) {
+            buf_offset[local_dim] = i;
+            posix_buffer_write(local_dim+1, fd, parms, buffer);
+
+            /* if next dimension is cont_dim, it will fill out the buffer
+               traversing the entire dimension local_dim without the need
+               of performing iteration */
+            if (local_dim+1==cont_dim)
+                break;
+        }
+    /* otherwise, perform contiguous POSIX access */
+    } else {
+
+        buf_offset[local_dim] = 0;
+
+        /* determine offset in the buffer */
+        for (i=0; i < parms->rank; i++){
+            d_offset=1;
+
+            for (j=i+1; j < parms->rank; j++)
+                d_offset *= parms->dset_size[j];
+
+            linear_dset_offset += (offset[i]+buf_offset[i])*d_offset;
+        }
+
+        /* only care if seek returns error */
+        rc = POSIXSEEK(fd->posixfd, linear_dset_offset) < 0 ? -1 : 0;
+        VRFY((rc==0), "POSIXSEEK");
+        /* check if all bytes are written */
+        rc = ((ssize_t)cont_size ==
+             POSIXWRITE(fd->posixfd, buf_p, cont_size));
+        VRFY((rc != 0), "POSIXWRITE");
+
+        /* Advance location in buffer */
+        buf_p += cont_size;
+
+    }
+done:
+    return ret_code;
+}
+
+/*
+ * Function:        do_read
+ * Purpose:         Read the required amount of data to the file.
+ * Return:          SUCCESS or FAIL
+ * Programmer:      Christian Chilan, April, 2008
+ * Modifications:
+ */
+static herr_t
+do_read(results *res, file_descr *fd, parameters *parms, void *buffer)
+{
+    char        *buffer2 = NULL;       /* Buffer for data verification */
+    int         ret_code = SUCCESS;
+    char        dname[64];
+    long        i;
+    /* HDF5 variables */
+    herr_t      hrc;                    /*HDF5 return code              */
+    hsize_t     h5dims[MAX_DIMS];       /*dataset dim sizes             */
+    hsize_t     h5block[MAX_DIMS];      /*dataspace selection           */
+    hsize_t     h5stride[MAX_DIMS];     /*selection stride              */
+    hsize_t     h5start[MAX_DIMS];      /*selection start               */
+    int         rank;
+
+    /* Allocate data verification buffer */
+    if(NULL == (buffer2 = (char *)malloc(linear_buf_size))) {
+        HDfprintf(stderr, "malloc for data verification buffer size (%Zu) failed\n", linear_buf_size);
+        GOTOERROR(FAIL);
+    } /* end if */
+
+    /* Prepare buffer for verifying data */
+    for(i = 0; i < linear_buf_size; i++)
+        buffer2[i] = i % 128;
+
+    rank = parms->rank;
+    for(i = 0; i < rank; i++)
+        h5offset[i] = offset[i] = 0;
+
+    /* I/O Access specific setup */
+    switch (parms->io_type) {
+    case POSIXIO:
+            cont_dim = rank;
+
+            for (i=rank-1; i>=0; i--) {
+                if (parms->buf_size[i]==parms->dset_size[i])
+                    cont_dim = i;
+                else
+                    break;
+            }
+            cont_size = (!cont_dim)? 1 : parms->buf_size[cont_dim-1];
+            for (i=cont_dim; i<rank; i++)
+                cont_size *= parms->buf_size[i];
+
+        break;
+
+    case HDF5: /* HDF5 setup */
+        for (i=0; i < rank; i++){
+            h5dims[i] = parms->dset_size[i];
+            h5start[i] = 0;
+            h5stride[i] = 1;
+            h5block[i] = 1;
+            h5count[i] = parms->buf_size[i];
+        }
+
+        h5dset_space_id = H5Screate_simple(rank, h5dims, NULL);
+        VRFY((h5dset_space_id >= 0), "H5Screate_simple");
+
+        hrc = H5Sselect_hyperslab(h5dset_space_id, H5S_SELECT_SET,
+                    h5start, h5stride, h5count, h5block);
+        VRFY((hrc >= 0), "H5Sselect_hyperslab");
+
+        /* Create the memory dataspace that corresponds to the xfer buffer */
+        h5mem_space_id = H5Screate_simple(rank, h5count, NULL);
+        VRFY((h5mem_space_id >= 0), "H5Screate_simple");
+
+        /* Create the dataset transfer property list */
+        h5dxpl = H5Pcreate(H5P_DATASET_XFER);
+        if (h5dxpl < 0) {
+            fprintf(stderr, "HDF5 Property List Create failed\n");
+            GOTOERROR(FAIL);
+        }
+        break;
+
+    default:
+        /* unknown request */
+        HDfprintf(stderr, "Unknown IO type request (%d)\n", (int)parms->io_type);
+        GOTOERROR(FAIL);
+        break;
+    } /* end switch */
+
+
+    /* create dataset */
+    switch (parms->io_type) {
+        case POSIXIO:
+        break;
+
+        case HDF5:
+        sprintf(dname, "Dataset_%ld", (long)parms->num_bytes);
+        h5ds_id = H5Dopen2(fd->h5fd, dname, H5P_DEFAULT);
+        if (h5ds_id < 0) {
+            HDfprintf(stderr, "HDF5 Dataset open failed\n");
+            GOTOERROR(FAIL);
+        }
+        break;
+		
+        default:
+        /* unknown request */
+        HDfprintf(stderr, "Unknown IO type request (%d)\n", (int)parms->io_type);
+        GOTOERROR(FAIL);
+        break;
+    } /* end switch */
+
+    /* Start "raw data" read timer */
+    set_time(res->timers, HDF5_RAW_READ_FIXED_DIMS, TSTART);
+    hrc = dset_read(rank-1, fd, parms, buffer, buffer2);
+
+    if (hrc < 0) {
+        fprintf(stderr, "Error in dataset read\n");
+        GOTOERROR(FAIL);
+    }
+
+    /* Stop "raw data" read timer */
+    set_time(res->timers, HDF5_RAW_READ_FIXED_DIMS, TSTOP);
+
+    /* Calculate read time */
+
+    /* Close dataset. Only HDF5 needs to do an explicit close. */
+    if (parms->io_type == HDF5) {
+        hrc = H5Dclose(h5ds_id);
+
+        if (hrc < 0) {
+        fprintf(stderr, "HDF5 Dataset Close failed\n");
+        GOTOERROR(FAIL);
+        }
+
+        h5ds_id = -1;
+    } /* end if */
+
+done:
+
+    /* release HDF5 objects */
+    if (h5dset_space_id != -1) {
+    hrc = H5Sclose(h5dset_space_id);
+    if (hrc < 0){
+        fprintf(stderr, "HDF5 Dataset Space Close failed\n");
+        ret_code = FAIL;
+    } else {
+        h5dset_space_id = -1;
+    }
+    }
+
+    if (h5mem_space_id != -1) {
+    hrc = H5Sclose(h5mem_space_id);
+    if (hrc < 0) {
+        fprintf(stderr, "HDF5 Memory Space Close failed\n");
+        ret_code = FAIL;
+    } else {
+        h5mem_space_id = -1;
+    }
+    }
+
+    if (h5dxpl != -1) {
+    hrc = H5Pclose(h5dxpl);
+    if (hrc < 0) {
+        fprintf(stderr, "HDF5 Dataset Transfer Property List Close failed\n");
+        ret_code = FAIL;
+    } else {
+        h5dxpl = -1;
+    }
+    }
+
+    /* release generic resources */
+    if(buffer2)
+        free(buffer2);
+
+    return ret_code;
+}
+
+/*
+ * Function:        dset_read
+ * Purpose:         Read buffer into the dataset.
+ * Return:          SUCCESS or FAIL
+ * Programmer:      Christian Chilan, April, 2008
+ * Modifications:
+ */
+
+static herr_t dset_read(int local_dim, file_descr *fd, parameters *parms,
+    void *buffer, const char *buffer2)
+{
+    int cur_dim = order[local_dim]-1;
+    int         ret_code = SUCCESS;
+    long i,j;
+    herr_t hrc;
+
+    /* iterate on the current dimension */
+    for (i=0; i < parms->dset_size[cur_dim]; i += parms->buf_size[cur_dim]){
+
+        h5offset[cur_dim] = offset[cur_dim] = i;
+
+        /* if traverse in order array is incomplete, recurse */
+        if (local_dim > 0){
+
+            ret_code = dset_read(local_dim-1, fd, parms, buffer, buffer2);
+
+        /* otherwise, write buffer into dataset */
+        }else{
+
+            switch (parms->io_type) {
+
+            case POSIXIO:
+                for (j=0; j<parms->rank; j++) {
+                   buf_offset[j] = 0;
+                }
+                buf_p = (unsigned char*)buffer;
+                posix_buffer_read(0, fd, parms, buffer);
+                break;
+
+            case HDF5:
+                hrc = H5Soffset_simple(h5dset_space_id, h5offset);
+                VRFY((hrc >= 0), "H5Soffset_simple");
+                /* Read the buffer out */
+                hrc = H5Dread(h5ds_id, ELMT_H5_TYPE, h5mem_space_id,
+                    h5dset_space_id, h5dxpl, buffer);
+                VRFY((hrc >= 0), "H5Dread");
+#if 0
+                for (j=0; j<linear_buf_size; j++) {
+                     buf_p = (unsigned char*)buffer;
+                     if (buf_p[j]!=buffer2[j])
+                        printf("Inconsistent data in %d\n", j);
+                }
+#endif
+                break;
+				
+            default:
+                /* unknown request */
+                HDfprintf(stderr, "Unknown IO type request (%d)\n", (int)parms->io_type);
+                HDassert(0 && "Unknown IO type");
+                break;
+            } /* switch (parms->io_type) */
+        }
+    }
+done:
+    return ret_code;
+}
+
+/*
+ * Function:        posix_buffer_read
+ * Purpose:         Read buffer into the POSIX file considering contiguity.
+ * Return:          SUCCESS or FAIL
+ * Programmer:      Christian Chilan, April, 2008
+ * Modifications:
+ */
+
+static herr_t posix_buffer_read(int local_dim, file_descr *fd, parameters *parms, void *buffer)
+{
+    int dtype_size = 1;
+    int         ret_code = SUCCESS;
+    long i;
+    size_t d_offset;
+    size_t linear_dset_offset = 0;
+    int j, rc;
+
+    /* if local dimension is not contiguous, recurse */
+    if (local_dim < parms->rank-1 && local_dim != cont_dim) {
+
+        for (i=0; i < parms->buf_size[local_dim]; i += dtype_size) {
+            buf_offset[local_dim] = i;
+            ret_code = posix_buffer_read(local_dim+1, fd, parms, buffer);
+            if (local_dim+1==cont_dim)
+                break;
+        }
+    /* otherwise, perform contiguous POSIX access */
+    } else {
+
+        buf_offset[local_dim] = 0;
+        /* determine offset in buffer */
+        for (i=0; i<parms->rank; i++){
+            d_offset=1;
+
+            for (j=i+1; j<parms->rank; j++)
+                d_offset *= parms->dset_size[j];
+
+            linear_dset_offset += (offset[i]+buf_offset[i])*d_offset;
+        }
+
+        /* only care if seek returns error */
+        rc = POSIXSEEK(fd->posixfd, linear_dset_offset) < 0 ? -1 : 0;
+        VRFY((rc==0), "POSIXSEEK");
+        /* check if all bytes are read */
+        rc = ((ssize_t)cont_size ==
+             POSIXREAD(fd->posixfd, buf_p, cont_size));
+        VRFY((rc != 0), "POSIXREAD");
+
+        /* Advance location in buffer */
+        buf_p += cont_size;
+
+    }
+done:
+    return ret_code;
+}
+
+
+/*
+ * Function:    do_fopen
+ * Purpose:     Open the specified file.
+ * Return:      SUCCESS or FAIL
+ * Programmer:  Albert Cheng, Bill Wendling, 2001/12/13
+ * Modifications: Support for file drivers, Christian Chilan, April, 2008
+ */
+    static herr_t
+do_fopen(parameters *param, char *fname, file_descr *fd /*out*/, int flags)
+{
+    int ret_code = SUCCESS;
+
+    switch (param->io_type) {
+    case POSIXIO:
+        if (flags & (SIO_CREATE | SIO_WRITE))
+            fd->posixfd = POSIXCREATE(fname);
+        else
+            fd->posixfd = POSIXOPEN(fname, O_RDONLY);
+
+        if (fd->posixfd < 0 ) {
+            HDfprintf(stderr, "POSIX File Open failed(%s)\n", fname);
+            GOTOERROR(FAIL);
+        }
+
+        break;
+
+    case HDF5:
+
+        fapl = set_vfd(param);
+
+        if (fapl < 0) {
+            fprintf(stderr, "HDF5 Property List Create failed\n");
+            GOTOERROR(FAIL);
+        }
+
+        /* create the parallel file */
+        if (flags & (SIO_CREATE | SIO_WRITE)) {
+            fd->h5fd = H5Fcreate(fname, H5F_ACC_TRUNC, H5P_DEFAULT, fapl);
+        } else {
+            fd->h5fd = H5Fopen(fname, H5F_ACC_RDONLY, fapl);
+        }
+
+
+        if (fd->h5fd < 0) {
+            fprintf(stderr, "HDF5 File Create failed(%s)\n", fname);
+            GOTOERROR(FAIL);
+        }
+        break;
+		
+    default:
+        /* unknown request */
+        HDfprintf(stderr, "Unknown IO type request (%d)\n", (int)param->io_type);
+        GOTOERROR(FAIL);
+        break;
+    }
+
+done:
+    return ret_code;
+}
+
+/*
+ * Function:    set_vfd
+ * Purpose:     Sets file driver.
+ * Return:      SUCCESS or FAIL
+ * Programmer:  Christian Chilan, April, 2008
+ * Modifications:
+ */
+
+hid_t
+set_vfd(parameters *param)
+{
+    hid_t my_fapl = -1;
+    vfdtype  vfd;
+
+    vfd = param->vfd;
+
+    if ((my_fapl=H5Pcreate(H5P_FILE_ACCESS))<0) return -1;
+
+    if (vfd == sec2) {
+        /* Unix read() and write() system calls */
+        if (H5Pset_fapl_sec2(my_fapl)<0) return -1;
+    } else if (vfd == stdio) {
+        /* Standard C fread() and fwrite() system calls */
+        if (H5Pset_fapl_stdio(my_fapl)<0) return -1;
+    } else if (vfd == core) {
+        /* In-core temporary file with 1MB increment */
+        if (H5Pset_fapl_core(my_fapl, (size_t)1024*1024, TRUE)<0) return -1;
+    } else if (vfd == split) {
+        /* Split meta data and raw data each using default driver */
+        if (H5Pset_fapl_split(my_fapl,
+                              "-m.h5", H5P_DEFAULT,
+                              "-r.h5", H5P_DEFAULT)<0)
+            return -1;
+    } else if (vfd == multi) {
+        /* Multi-file driver, general case of the split driver */
+        H5FD_mem_t memb_map[H5FD_MEM_NTYPES];
+        hid_t memb_fapl[H5FD_MEM_NTYPES];
+        const char *memb_name[H5FD_MEM_NTYPES];
+        char sv[H5FD_MEM_NTYPES][1024];
+        haddr_t memb_addr[H5FD_MEM_NTYPES];
+        H5FD_mem_t      mt;
+
+        HDmemset(memb_map, 0, sizeof memb_map);
+        HDmemset(memb_fapl, 0, sizeof memb_fapl);
+        HDmemset(memb_name, 0, sizeof memb_name);
+        HDmemset(memb_addr, 0, sizeof memb_addr);
+
+        HDassert(HDstrlen(multi_letters)==H5FD_MEM_NTYPES);
+        for (mt=H5FD_MEM_DEFAULT; mt<H5FD_MEM_NTYPES; H5_INC_ENUM(H5FD_mem_t,mt)) {
+            memb_fapl[mt] = H5P_DEFAULT;
+            sprintf(sv[mt], "%%s-%c.h5", multi_letters[mt]);
+            memb_name[mt] = sv[mt];
+            memb_addr[mt] = MAX(mt-1,0)*(HADDR_MAX/10);
+        }
+
+        if (H5Pset_fapl_multi(my_fapl, memb_map, memb_fapl, memb_name,
+                              memb_addr, FALSE)<0) {
+            return -1;
+        }
+    } else if (vfd == family) {
+        hsize_t fam_size = 1*1024*1024; /*100 MB*/
+
+        /* Family of files, each 1MB and using the default driver */
+        /* if ((val=HDstrtok(NULL, " \t\n\r")))
+            fam_size = (hsize_t)(HDstrtod(val, NULL) * 1024*1024); */
+        if (H5Pset_fapl_family(my_fapl, fam_size, H5P_DEFAULT)<0)
+            return -1;
+    } else if (vfd == direct) {
+#ifdef H5_HAVE_DIRECT
+        /* Linux direct read() and write() system calls.  Set memory boundary, file block size,
+         * and copy buffer size to the default values. */
+        if (H5Pset_fapl_direct(my_fapl, 1024, 4096, 8*4096)<0) return -1;
+#endif
+    } else {
+        /* Unknown driver */
+        return -1;
+    }
+
+    return my_fapl;
+}
+
+/*
+ * Function:    do_fclose
+ * Purpose:     Close the specified file descriptor.
+ * Return:      SUCCESS or FAIL
+ * Programmer:  Albert Cheng, Bill Wendling, 2001/12/13
+ * Modifications:
+ */
+    static herr_t
+do_fclose(iotype iot, file_descr *fd /*out*/)
+{
+    herr_t ret_code = SUCCESS, hrc;
+    int  rc = 0;
+
+    switch (iot) {
+    case POSIXIO:
+        rc = POSIXCLOSE(fd->posixfd);
+
+        if (rc != 0){
+        fprintf(stderr, "POSIX File Close failed\n");
+        GOTOERROR(FAIL);
+        }
+
+        fd->posixfd = -1;
+        break;
+
+    case HDF5:
+        hrc = H5Fclose(fd->h5fd);
+
+        if (hrc < 0) {
+        fprintf(stderr, "HDF5 File Close failed\n");
+        GOTOERROR(FAIL);
+        }
+
+        fd->h5fd = -1;
+        break;
+		
+    default:
+        /* unknown request */
+        HDfprintf(stderr, "Unknown IO type request (%d)\n", (int)iot);
+        GOTOERROR(FAIL);
+        break;
+    }
+
+done:
+    return ret_code;
+}
+
+
+/*
+ * Function:    do_cleanupfile
+ * Purpose:     Cleanup temporary file unless HDF5_NOCLEANUP is set.
+ * Return:      void
+ * Programmer:  Albert Cheng 2001/12/12
+ * Modifications: Support for file drivers. Christian Chilan, April, 2008
+ */
+    static void
+do_cleanupfile(iotype iot, char *filename)
+{
+    char        temp[2048];
+    int         j;
+    hid_t       driver;
+
+    if (clean_file_g == -1)
+    clean_file_g = (HDgetenv("HDF5_NOCLEANUP")==NULL) ? 1 : 0;
+
+    if (clean_file_g){
+
+    switch (iot) {
+    case POSIXIO:
+          HDremove(filename);
+        break;
+
+    case HDF5:
+           driver = H5Pget_driver(fapl);
+
+            if (driver == H5FD_FAMILY) {
+                for (j = 0; /*void*/; j++) {
+                    HDsnprintf(temp, sizeof temp, filename, j);
+
+                    if (HDaccess(temp, F_OK) < 0)
+                        break;
+
+                    HDremove(temp);
+                }
+            } else if (driver == H5FD_CORE) {
+                hbool_t backing;        /* Whether the core file has backing store */
+
+                H5Pget_fapl_core(fapl,NULL,&backing);
+
+                /* If the file was stored to disk with bacing store, remove it */
+                if(backing)
+                    HDremove(filename);
+
+            } else if (driver == H5FD_MULTI) {
+                H5FD_mem_t mt;
+                assert(HDstrlen(multi_letters)==H5FD_MEM_NTYPES);
+
+                for (mt = H5FD_MEM_DEFAULT; mt < H5FD_MEM_NTYPES; H5_INC_ENUM(H5FD_mem_t,mt)) {
+                    HDsnprintf(temp, sizeof temp, "%s-%c.h5",
+                               filename, multi_letters[mt]);
+                    HDremove(temp); /*don't care if it fails*/
+                }
+            } else {
+                HDremove(filename);
+            }
+            H5Pclose(fapl);
+        break;
+			
+    default:
+        /* unknown request */
+        HDfprintf(stderr, "Unknown IO type request (%d)\n", (int)iot);
+        HDassert(0 && "Unknown IO type");
+        break;
+    }
+    }
+}
+
diff --git a/tools/perform/sio_perf.c b/tools/perform/sio_perf.c
new file mode 100644
index 0000000..26cec6d
--- /dev/null
+++ b/tools/perform/sio_perf.c
@@ -0,0 +1,1409 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Serial HDF5 Performance Testing Code
+ * --------------------------------------
+ *
+ * Portable code to test performance on the different platforms we support.
+ * This is what the report should look like:
+ *
+ *  nprocs = Max#Procs
+ *      IO API = POSIXIO
+ *          # Files = 1, # of dsets = 1000, Elements per dset = 37000
+ *              Write Results = x MB/s
+ *              Read Results = x MB/s
+ *          # Files = 1, # of dsets = 3000, Elements per dset = 37000
+ *              Write Results = x MB/s
+ *              Read Results = x MB/s
+ *
+ *          . . .
+ *
+ *
+ *      IO API = HDF5
+ *          # Files = 1, # of dsets = 1000, Elements per dset = 37000
+ *              Write Results = x MB/s
+ *              Read Results = x MB/s
+ *          # Files = 1, # of dsets = 3000, Elements per dset = 37000
+ *              Write Results = x MB/s
+ *              Read Results = x MB/s
+ *
+ *          . . .
+ *
+ *
+ *      . . .
+ *
+ */
+
+/* system header files */
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "hdf5.h"
+
+
+/* our header files */
+#include "sio_perf.h"
+
+/* useful macros */
+#define TAB_SPACE           4
+
+#define ONE_KB              1024
+#define ONE_MB              (ONE_KB * ONE_KB)
+#define ONE_GB              (ONE_MB * ONE_KB)
+
+#define SIO_POSIX           0x1
+#define SIO_HDF5            0x4
+
+/* report 0.0 in case t is zero too */
+#define MB_PER_SEC(bytes,t) (((t)==0.0) ? 0.0 : ((((double)bytes) / ONE_MB) / (t)))
+
+#ifndef TRUE
+#define TRUE    1
+#endif  /* TRUE */
+#ifndef FALSE
+#define FALSE   (!TRUE)
+#endif  /* FALSE */
+
+/* global variables */
+FILE       *output;             /* output file                          */
+int         sio_debug_level = 0;/* The debug level:
+                                 *   0 - Off
+                                 *   1 - Minimal
+                                 *   2 - Some more
+                                 *   3 - Maximal
+                                 *   4 - Maximal & then some
+                                 */
+
+/* local variables */
+static const char  *progname = "h5perf_serial";
+
+/*
+ * Command-line options: The user can specify short or long-named
+ * parameters. The long-named ones can be partially spelled. When
+ * adding more, make sure that they don't clash with each other.
+ */
+
+/*
+ * It seems that only the options that accept additional information
+ * such as dataset size (-e) require the colon next to it.
+ */
+#if 1
+static const char *s_opts = "a:A:B:c:Cd:D:e:F:ghi:Imno:p:P:r:stT:v:wx:X:";
+#else
+static const char *s_opts = "a:A:bB:c:Cd:D:e:F:ghi:Imno:p:P:r:stT:wx:X:";
+#endif  /* 1 */
+static struct long_options l_opts[] = {
+    { "align", require_arg, 'a' },
+    { "alig", require_arg, 'a' },
+    { "ali", require_arg, 'a' },
+    { "al", require_arg, 'a' },
+    { "api", require_arg, 'A' },
+    { "ap", require_arg, 'A' },
+#if 0
+    /* a sighting of the elusive binary option */
+    { "binary", no_arg, 'b' },
+    { "binar", no_arg, 'b' },
+    { "bina", no_arg, 'b' },
+    { "bin", no_arg, 'b' },
+    { "bi", no_arg, 'b' },
+#endif  /* 0 */
+    { "block-size", require_arg, 'B' },
+    { "block-siz", require_arg, 'B' },
+    { "block-si", require_arg, 'B' },
+    { "block-s", require_arg, 'B' },
+    { "block-", require_arg, 'B' },
+    { "block", require_arg, 'B' },
+    { "bloc", require_arg, 'B' },
+    { "blo", require_arg, 'B' },
+    { "bl", require_arg, 'B' },
+    { "chunk", no_arg, 'c' },
+    { "chun", no_arg, 'c' },
+    { "chu", no_arg, 'c' },
+    { "ch", no_arg, 'c' },
+    { "collective", no_arg, 'C' },
+    { "collectiv", no_arg, 'C' },
+    { "collecti", no_arg, 'C' },
+    { "collect", no_arg, 'C' },
+    { "collec", no_arg, 'C' },
+    { "colle", no_arg, 'C' },
+    { "coll", no_arg, 'C' },
+    { "col", no_arg, 'C' },
+    { "co", no_arg, 'C' },
+    { "debug", require_arg, 'D' },
+    { "debu", require_arg, 'D' },
+    { "deb", require_arg, 'D' },
+    { "de", require_arg, 'D' },
+    { "file-driver", require_arg, 'v' },
+    { "file-drive", require_arg, 'v' },
+    { "file-driv", require_arg, 'v' },
+    { "file-dri", require_arg, 'v' },
+    { "file-dr", require_arg, 'v' },
+    { "file-d", require_arg, 'v' },
+    { "file-", require_arg, 'v' },
+    { "file", require_arg, 'v' },
+    { "fil", require_arg, 'v' },
+    { "fi", require_arg, 'v' },
+    { "geometry", no_arg, 'g' },
+    { "geometr", no_arg, 'g' },
+    { "geomet", no_arg, 'g' },
+    { "geome", no_arg, 'g' },
+    { "geom", no_arg, 'g' },
+    { "geo", no_arg, 'g' },
+    { "ge", no_arg, 'g' },
+    { "help", no_arg, 'h' },
+    { "hel", no_arg, 'h' },
+    { "he", no_arg, 'h' },
+    { "interleaved", require_arg, 'I' },
+    { "interleave", require_arg, 'I' },
+    { "interleav", require_arg, 'I' },
+    { "interlea", require_arg, 'I' },
+    { "interle", require_arg, 'I' },
+    { "interl", require_arg, 'I' },
+    { "inter", require_arg, 'I' },
+    { "inte", require_arg, 'I' },
+    { "int", require_arg, 'I' },
+    { "in", require_arg, 'I' },
+    { "max-num-processes", require_arg, 'P' },
+    { "max-num-processe", require_arg, 'P' },
+    { "max-num-process", require_arg, 'P' },
+    { "max-num-proces", require_arg, 'P' },
+    { "max-num-proce", require_arg, 'P' },
+    { "max-num-proc", require_arg, 'P' },
+    { "max-num-pro", require_arg, 'P' },
+    { "max-num-pr", require_arg, 'P' },
+    { "max-num-p", require_arg, 'P' },
+    { "min-num-processes", require_arg, 'p' },
+    { "min-num-processe", require_arg, 'p' },
+    { "min-num-process", require_arg, 'p' },
+    { "min-num-proces", require_arg, 'p' },
+    { "min-num-proce", require_arg, 'p' },
+    { "min-num-proc", require_arg, 'p' },
+    { "min-num-pro", require_arg, 'p' },
+    { "min-num-pr", require_arg, 'p' },
+    { "min-num-p", require_arg, 'p' },
+    { "max-xfer-size", require_arg, 'X' },
+    { "max-xfer-siz", require_arg, 'X' },
+    { "max-xfer-si", require_arg, 'X' },
+    { "max-xfer-s", require_arg, 'X' },
+    { "max-xfer", require_arg, 'X' },
+    { "max-xfe", require_arg, 'X' },
+    { "max-xf", require_arg, 'X' },
+    { "max-x", require_arg, 'X' },
+    { "min-xfer-size", require_arg, 'x' },
+    { "min-xfer-siz", require_arg, 'x' },
+    { "min-xfer-si", require_arg, 'x' },
+    { "min-xfer-s", require_arg, 'x' },
+    { "min-xfer", require_arg, 'x' },
+    { "min-xfe", require_arg, 'x' },
+    { "min-xf", require_arg, 'x' },
+    { "min-x", require_arg, 'x' },
+    { "num-bytes", require_arg, 'e' },
+    { "num-byte", require_arg, 'e' },
+    { "num-byt", require_arg, 'e' },
+    { "num-by", require_arg, 'e' },
+    { "num-b", require_arg, 'e' },
+    { "num-dsets", require_arg, 'd' },
+    { "num-dset", require_arg, 'd' },
+    { "num-dse", require_arg, 'd' },
+    { "num-ds", require_arg, 'd' },
+    { "num-d", require_arg, 'd' },
+    { "num-files", require_arg, 'F' },
+    { "num-file", require_arg, 'F' },
+    { "num-fil", require_arg, 'F' },
+    { "num-fi", require_arg, 'F' },
+    { "num-f", require_arg, 'F' },
+    { "num-iterations", require_arg, 'i' },
+    { "num-iteration", require_arg, 'i' },
+    { "num-iteratio", require_arg, 'i' },
+    { "num-iterati", require_arg, 'i' },
+    { "num-iterat", require_arg, 'i' },
+    { "num-itera", require_arg, 'i' },
+    { "num-iter", require_arg, 'i' },
+    { "num-ite", require_arg, 'i' },
+    { "num-it", require_arg, 'i' },
+    { "num-i", require_arg, 'i' },
+    { "order", require_arg, 'r' },
+    { "orde", require_arg, 'r' },
+    { "ord", require_arg, 'r' },
+    { "or", require_arg, 'r' },
+    { "output", require_arg, 'o' },
+    { "outpu", require_arg, 'o' },
+    { "outp", require_arg, 'o' },
+    { "out", require_arg, 'o' },
+    { "ou", require_arg, 'o' },
+    { "extendable", no_arg, 't' },
+    { "extendabl", no_arg, 't' },
+    { "extendab", no_arg, 't' },
+    { "extenda", no_arg, 't' },
+    { "extend", no_arg, 't' },
+    { "exten", no_arg, 't' },
+    { "exte", no_arg, 't' },
+    { "ext", no_arg, 't' },
+    { "ex", no_arg, 't' },
+    { "threshold", require_arg, 'T' },
+    { "threshol", require_arg, 'T' },
+    { "thresho", require_arg, 'T' },
+    { "thresh", require_arg, 'T' },
+    { "thres", require_arg, 'T' },
+    { "thre", require_arg, 'T' },
+    { "thr", require_arg, 'T' },
+    { "th", require_arg, 'T' },
+    { "write-only", require_arg, 'w' },
+    { "write-onl", require_arg, 'w' },
+    { "write-on", require_arg, 'w' },
+    { "write-o", require_arg, 'w' },
+    { "write", require_arg, 'w' },
+    { "writ", require_arg, 'w' },
+    { "wri", require_arg, 'w' },
+    { "wr", require_arg, 'w' },
+    { NULL, 0, '\0' }
+};
+
+struct options {
+    long io_types;              /* bitmask of which I/O types to test   */
+    const char *output_file;    /* file to print report to              */
+    long num_dsets;             /* number of datasets                   */
+    long num_files;             /* number of files                      */
+    off_t num_bpp;              /* number of bytes per proc per dset    */
+    int num_iters;              /* number of iterations                 */
+    off_t dset_size[MAX_DIMS];  /* Dataset size                           */
+    size_t buf_size[MAX_DIMS];  /* Buffer size                           */
+    size_t chk_size[MAX_DIMS];  /* Chunk size                           */
+    int order[MAX_DIMS];  /* Dimension access order                           */
+    int dset_rank;             /* Rank                   */
+    int buf_rank;             /* Rank                   */
+    int order_rank;             /* Rank                   */
+    int chk_rank;             /* Rank                   */
+    int print_times;       	/* print times as well as throughputs   */
+    int print_raw;         	/* print raw data throughput info       */
+    off_t h5_alignment;         /* alignment in HDF5 file               */
+    off_t h5_threshold;         /* threshold for alignment in HDF5 file */
+    int h5_use_chunks;     	/* Make HDF5 dataset chunked            */
+    int h5_write_only;        	/* Perform the write tests only         */
+    int h5_extendable;        	/* Perform the write tests only         */
+    int verify;        		/* Verify data correctness              */
+    vfdtype     vfd;            /* File driver */
+
+};
+
+typedef struct _minmax {
+    double min;
+    double max;
+    double sum;
+    int num;
+} minmax;
+
+/* local functions */
+static off_t parse_size_directive(const char *size);
+static struct options *parse_command_line(int argc, char *argv[]);
+static void run_test_loop(struct options *options);
+static int run_test(iotype iot, parameters parms, struct options *opts);
+static void output_all_info(minmax *mm, int count, int indent_level);
+static void get_minmax(minmax *mm, double val);
+static minmax accumulate_minmax_stuff(minmax *mm, int count);
+static void output_results(const struct options *options, const char *name,
+                           minmax *table, int table_size, off_t data_size);
+static void output_report(const char *fmt, ...);
+static void print_indent(register int indent);
+static void usage(const char *prog);
+static void report_parameters(struct options *opts);
+
+/*
+ * Function:    main
+ * Purpose:     Start things up.
+ * Return:      EXIT_SUCCESS or EXIT_FAILURE
+ * Programmer:  Bill Wendling, 30. October 2001
+ * Modifications:
+ */
+int
+main(int argc, char **argv)
+{
+    int exit_value = EXIT_SUCCESS;
+    struct options *opts = NULL;
+
+#ifndef STANDALONE
+    /* Initialize h5tools lib */
+    h5tools_init();
+#endif
+    
+    output = stdout;
+
+    opts = parse_command_line(argc, argv);
+
+    if (!opts) {
+        exit_value = EXIT_FAILURE;
+        goto finish;
+    }
+
+    if (opts->output_file) {
+        if ((output = HDfopen(opts->output_file, "w")) == NULL) {
+            fprintf(stderr, "%s: cannot open output file\n", progname);
+            perror(opts->output_file);
+            goto finish;
+        }
+    }
+
+    report_parameters(opts);
+
+    run_test_loop(opts);
+
+finish:
+    free(opts);
+    return exit_value;
+}
+
+/*
+ * Function:    run_test_loop
+ * Purpose:     Run the I/O tests. Write the results to OUTPUT.
+ *
+ *            - The slowest changing part of the test is the number of
+ *              processors to use. For each loop iteration, we divide that
+ *              number by 2 and rerun the test.
+ *
+ *            - The second slowest is what type of IO API to perform. We have
+ *              three choices: POSIXIO, and HDF5.
+ *
+ *            - Then we change the size of the buffer. This information is
+ *              inferred from the number of datasets to create and the number
+ *              of integers to put into each dataset. The backend code figures
+ *              this out.
+ *
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 30. October 2001
+ * Modifications:
+ *    Added multidimensional testing (Christian Chilan, April, 2008)
+ */
+static void
+run_test_loop(struct options *opts)
+{
+    parameters parms;
+    int i;
+    size_t      buf_bytes;
+    /* load options into parameter structure */
+    parms.num_files = opts->num_files;
+    parms.num_dsets = opts->num_dsets;
+    parms.num_iters = opts->num_iters;
+    parms.rank = opts->dset_rank;
+    parms.h5_align = opts->h5_alignment;
+    parms.h5_thresh = opts->h5_threshold;
+    parms.h5_use_chunks = opts->h5_use_chunks;
+    parms.h5_extendable = opts->h5_extendable;
+    parms.h5_write_only = opts->h5_write_only;
+    parms.verify = opts->verify;
+    parms.vfd = opts->vfd;
+
+    /* load multidimensional options */
+    parms.num_bytes = 1;
+    buf_bytes = 1;
+    for (i=0; i<parms.rank; i++){
+        parms.buf_size[i] = opts->buf_size[i];
+        parms.dset_size[i] = opts->dset_size[i];
+        parms.chk_size[i] = opts->chk_size[i];
+        parms.order[i] = opts->order[i];
+        parms.num_bytes *= opts->dset_size[i];
+        buf_bytes *= opts->buf_size[i];
+    }
+
+    /* print size information */
+    output_report("Transfer Buffer Size (bytes): %d\n", buf_bytes);
+    output_report("File Size(MB): %.2f\n",((double)parms.num_bytes) / ONE_MB);
+
+    print_indent(0);
+    if (opts->io_types & SIO_POSIX)
+        run_test(POSIXIO, parms, opts);
+
+    print_indent(0);
+    if (opts->io_types & SIO_HDF5)
+        run_test(HDF5, parms, opts);
+}
+
+/*
+ * Function:    run_test
+ * Purpose:     Inner loop call to actually run the I/O test.
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 18. December 2001
+ * Modifications:
+ */
+static int
+run_test(iotype iot, parameters parms, struct options *opts)
+{
+    results         res;
+    register int    i, ret_value = SUCCESS;
+    off_t           raw_size;
+    minmax         *write_sys_mm_table=NULL;
+    minmax         *write_mm_table=NULL;
+    minmax         *write_gross_mm_table=NULL;
+    minmax         *write_raw_mm_table=NULL;
+    minmax         *read_sys_mm_table=NULL;
+    minmax         *read_mm_table=NULL;
+    minmax         *read_gross_mm_table=NULL;
+    minmax         *read_raw_mm_table=NULL;
+    minmax          write_sys_mm = {0.0, 0.0, 0.0, 0};
+    minmax          write_mm = {0.0, 0.0, 0.0, 0};
+    minmax          write_gross_mm = {0.0, 0.0, 0.0, 0};
+    minmax          write_raw_mm = {0.0, 0.0, 0.0, 0};
+    minmax          read_sys_mm = {0.0, 0.0, 0.0, 0};
+    minmax          read_mm = {0.0, 0.0, 0.0, 0};
+    minmax          read_gross_mm = {0.0, 0.0, 0.0, 0};
+    minmax          read_raw_mm = {0.0, 0.0, 0.0, 0};
+
+    raw_size = (off_t)parms.num_bytes;
+    parms.io_type = iot;
+    print_indent(2);
+    output_report("IO API = ");
+
+    switch (iot) {
+        case POSIXIO:
+            output_report("POSIX\n");
+            break;
+        case HDF5:
+            output_report("HDF5\n");
+            break;
+        default:
+            /* unknown request */
+            HDfprintf(stderr, "Unknown IO type request (%d)\n", (int)iot);
+            HDassert(0 && "Unknown IO tpe");
+            break;
+    }
+
+    /* allocate space for tables minmax and that it is sufficient */
+    /* to initialize all elements to zeros by calloc.             */
+    write_sys_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+    write_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+    write_gross_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+    write_raw_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+
+    if (!parms.h5_write_only) {
+        read_sys_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+        read_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+        read_gross_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+        read_raw_mm_table = calloc((size_t)parms.num_iters , sizeof(minmax));
+    }
+
+    /* Do IO iteration times, collecting statistics each time */
+    for (i = 0; i < parms.num_iters; ++i) {
+        double t;
+        res = do_sio(parms);
+
+        /* gather all of the "sys write" times */
+        t = get_time(res.timers, HDF5_MPI_WRITE);
+        get_minmax(&write_sys_mm, t);
+
+        write_sys_mm_table[i] = write_sys_mm;
+
+        /* gather all of the "write" times */
+        t = get_time(res.timers, HDF5_FINE_WRITE_FIXED_DIMS);
+        get_minmax(&write_mm, t);
+
+        write_mm_table[i] = write_mm;
+
+        /* gather all of the "write" times from open to close */
+        t = get_time(res.timers, HDF5_GROSS_WRITE_FIXED_DIMS);
+        get_minmax(&write_gross_mm, t);
+
+        write_gross_mm_table[i] = write_gross_mm;
+
+        /* gather all of the raw "write" times */
+        t = get_time(res.timers, HDF5_RAW_WRITE_FIXED_DIMS);
+        get_minmax(&write_raw_mm, t);
+
+        write_raw_mm_table[i] = write_raw_mm;
+
+        if (!parms.h5_write_only) {
+            /* gather all of the "mpi read" times */
+            t = get_time(res.timers, HDF5_MPI_READ);
+            get_minmax(&read_sys_mm, t);
+
+            read_sys_mm_table[i] = read_sys_mm;
+
+            /* gather all of the "read" times */
+            t = get_time(res.timers, HDF5_FINE_READ_FIXED_DIMS);
+            get_minmax(&read_mm, t);
+
+            read_mm_table[i] = read_mm;
+
+            /* gather all of the "read" times from open to close */
+            t = get_time(res.timers, HDF5_GROSS_READ_FIXED_DIMS);
+            get_minmax(&read_gross_mm, t);
+
+            read_gross_mm_table[i] = read_gross_mm;
+
+            /* gather all of the raw "read" times */
+            t = get_time(res.timers, HDF5_RAW_READ_FIXED_DIMS);
+            get_minmax(&read_raw_mm, t);
+
+            read_raw_mm_table[i] = read_gross_mm;
+        }
+        sio_time_destroy(res.timers);
+    }
+
+    /*
+     * Show various statistics
+     */
+    /* Write statistics	*/
+    /* Print the raw data throughput if desired */
+    if (opts->print_raw) {
+        /* accumulate and output the max, min, and average "raw write" times */
+        if (sio_debug_level >= 3) {
+            /* output all of the times for all iterations */
+            print_indent(3);
+            output_report("Raw Data Write details:\n");
+            output_all_info(write_raw_mm_table, parms.num_iters, 4);
+        }
+
+        output_results(opts,"Raw Data Write",write_raw_mm_table,parms.num_iters,raw_size);
+    } /* end if */
+
+    /* show sys write statics */
+#if 0
+    if (sio_debug_level >= 3) {
+        /* output all of the times for all iterations */
+        print_indent(3);
+        output_report("MPI Write details:\n");
+        output_all_info(write_sys_mm_table, parms.num_iters, 4);
+    }
+#endif
+    /* We don't currently output the MPI write results */
+
+    /* accumulate and output the max, min, and average "write" times */
+    if (sio_debug_level >= 3) {
+        /* output all of the times for all iterations */
+        print_indent(3);
+        output_report("Write details:\n");
+        output_all_info(write_mm_table, parms.num_iters, 4);
+    }
+
+    output_results(opts,"Write",write_mm_table,parms.num_iters,raw_size);
+
+    /* accumulate and output the max, min, and average "gross write" times */
+    if (sio_debug_level >= 3) {
+        /* output all of the times for all iterations */
+        print_indent(3);
+        output_report("Write Open-Close details:\n");
+        output_all_info(write_gross_mm_table, parms.num_iters, 4);
+    }
+
+    output_results(opts,"Write Open-Close",write_gross_mm_table,parms.num_iters,raw_size);
+
+    if (!parms.h5_write_only) {
+        /* Read statistics	*/
+        /* Print the raw data throughput if desired */
+        if (opts->print_raw) {
+            /* accumulate and output the max, min, and average "raw read" times */
+            if (sio_debug_level >= 3) {
+                /* output all of the times for all iterations */
+                print_indent(3);
+                output_report("Raw Data Read details:\n");
+                output_all_info(read_raw_mm_table, parms.num_iters, 4);
+            }
+
+            output_results(opts, "Raw Data Read", read_raw_mm_table,
+                           parms.num_iters, raw_size);
+        } /* end if */
+
+        /* show mpi read statics */
+#if 0
+        if (sio_debug_level >= 3) {
+            /* output all of the times for all iterations */
+            print_indent(3);
+            output_report("MPI Read details:\n");
+            output_all_info(read_sys_mm_table, parms.num_iters, 4);
+        }
+#endif
+        /* We don't currently output the MPI read results */
+
+        /* accumulate and output the max, min, and average "read" times */
+        if (sio_debug_level >= 3) {
+            /* output all of the times for all iterations */
+            print_indent(3);
+            output_report("Read details:\n");
+            output_all_info(read_mm_table, parms.num_iters, 4);
+        }
+
+        output_results(opts, "Read", read_mm_table, parms.num_iters, raw_size);
+
+        /* accumulate and output the max, min, and average "gross read" times */
+        if (sio_debug_level >= 3) {
+            /* output all of the times for all iterations */
+            print_indent(3);
+            output_report("Read Open-Close details:\n");
+            output_all_info(read_gross_mm_table, parms.num_iters, 4);
+        }
+
+        output_results(opts, "Read Open-Close", read_gross_mm_table,
+                       parms.num_iters, raw_size);
+    }
+
+    /* clean up our mess */
+    free(write_sys_mm_table);
+    free(write_mm_table);
+    free(write_gross_mm_table);
+    free(write_raw_mm_table);
+
+    if (!parms.h5_write_only) {
+        free(read_sys_mm_table);
+        free(read_mm_table);
+        free(read_gross_mm_table);
+        free(read_raw_mm_table);
+    }
+
+    return ret_value;
+}
+
+/*
+ * Function:    output_all_info
+ * Purpose:
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 29. January 2002
+ * Modifications:
+ */
+static void
+output_all_info(minmax *mm, int count, int indent_level)
+{
+    int i;
+
+    for (i = 0; i < count; ++i) {
+        print_indent(indent_level);
+        output_report("Iteration %d:\n", i + 1);
+        print_indent(indent_level + 1);
+        output_report("Minimum Time: %.2fs\n", mm[i].min);
+        print_indent(indent_level + 1);
+        output_report("Maximum Time: %.2fs\n", mm[i].max);
+    }
+}
+
+/*
+ * Function:    get_minmax
+ * Purpose:     Gather all the min, max and total of val.
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 21. December 2001
+ * Modifications:
+ *    Use MPI_Allreduce to do it. -akc, 2002/01/11
+ */
+
+static void
+get_minmax(minmax *mm, double val)
+{
+    mm->max = val;
+    mm->min = val;
+    mm->sum = val;
+}
+
+/*
+ * Function:    accumulate_minmax_stuff
+ * Purpose:     Accumulate the minimum, maximum, and average of the times
+ *              across all processes.
+ * Return:      TOTAL_MM - the total of all of these.
+ * Programmer:  Bill Wendling, 21. December 2001
+ * Modifications:
+ *              Changed to use seconds instead of MB/s - QAK, 5/9/02
+ */
+static minmax
+accumulate_minmax_stuff(minmax *mm, int count)
+{
+    int i;
+    minmax total_mm;
+
+    total_mm.sum = 0.0;
+    total_mm.max = -DBL_MAX;
+    total_mm.min = DBL_MAX;
+    total_mm.num = count;
+
+    for (i = 0; i < count; ++i) {
+        double m = mm[i].max;
+
+        total_mm.sum += m;
+
+        if (m < total_mm.min)
+            total_mm.min = m;
+
+        if (m > total_mm.max)
+            total_mm.max = m;
+    }
+
+    return total_mm;
+}
+
+
+/*
+ * Function:    output_results
+ * Purpose:     Print information about the time & bandwidth for a given
+ *                  minmax & # of iterations.
+ * Return:      Nothing
+ * Programmer:  Quincey Koziol, 9. May 2002
+ * Modifications:
+ */
+static void
+output_results(const struct options *opts, const char *name, minmax *table,
+    int table_size,off_t data_size)
+{
+    minmax          total_mm;
+
+    total_mm = accumulate_minmax_stuff(table, table_size);
+
+    print_indent(3);
+    output_report("%s (%d iteration(s)):\n", name,table_size);
+
+    /* Note: The maximum throughput uses the minimum amount of time & vice versa */
+
+    print_indent(4);
+    output_report("Maximum Throughput: %6.2f MB/s", MB_PER_SEC(data_size,total_mm.min));
+    if(opts->print_times)
+        output_report(" (%7.3f s)\n", total_mm.min);
+    else
+        output_report("\n");
+
+    print_indent(4);
+    output_report("Average Throughput: %6.2f MB/s",
+                  MB_PER_SEC(data_size,total_mm.sum / total_mm.num));
+    if(opts->print_times)
+        output_report(" (%7.3f s)\n", (total_mm.sum / total_mm.num));
+    else
+        output_report("\n");
+
+    print_indent(4);
+    output_report("Minimum Throughput: %6.2f MB/s", MB_PER_SEC(data_size,total_mm.max));
+    if(opts->print_times)
+        output_report(" (%7.3f s)\n", total_mm.max);
+    else
+        output_report("\n");
+}
+
+/*
+ * Function:    output_report
+ * Purpose:     Print a line of the report. Only do so if I'm the 0 process.
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 19. December 2001
+ * Modifications:
+ */
+static void
+output_report(const char *fmt, ...)
+{
+        va_list ap;
+
+        va_start(ap, fmt);
+        vfprintf(output, fmt, ap);
+        va_end(ap);
+}
+
+/*
+ * Function:    print_indent
+ * Purpose:     Print spaces to indent a new line of text for pretty printing
+ *              things.
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 29. October 2001
+ * Modifications:
+ */
+static void
+print_indent(register int indent)
+{
+	indent *= TAB_SPACE;
+
+	for (; indent > 0; --indent)
+	    fputc(' ', output);
+}
+
+static void
+recover_size_and_print(long long val, const char *end)
+{
+    if (val >= ONE_KB && (val % ONE_KB) == 0) {
+        if (val >= ONE_MB && (val % ONE_MB) == 0) {
+            if (val >= ONE_GB && (val % ONE_GB) == 0)
+                HDfprintf(output, "%" H5_PRINTF_LL_WIDTH "d""GB%s", val / ONE_GB, end);
+            else
+                HDfprintf(output, "%" H5_PRINTF_LL_WIDTH "d""MB%s", val / ONE_MB, end);
+        } else {
+            HDfprintf(output, "%" H5_PRINTF_LL_WIDTH "d""KB%s", val / ONE_KB, end);
+        }
+    } else {
+        HDfprintf(output, "%" H5_PRINTF_LL_WIDTH "d""%s", val, end);
+    }
+}
+
+static void
+print_io_api(long io_types)
+{
+    if (io_types & SIO_POSIX)
+	HDfprintf(output, "posix ");
+    if (io_types & SIO_HDF5)
+	HDfprintf(output, "hdf5 ");
+    HDfprintf(output, "\n");
+}
+
+static void
+report_parameters(struct options *opts)
+{
+    int i, rank;
+    rank = opts->dset_rank;
+
+    print_version("HDF5 Library");	/* print library version */
+    HDfprintf(output, "==== Parameters ====\n");
+
+    HDfprintf(output, "IO API=");
+    print_io_api(opts->io_types);
+
+    HDfprintf(output, "Number of iterations=%d\n",
+              opts->num_iters);
+
+    HDfprintf(output, "Dataset size=");
+
+    for (i=0; i<rank; i++)
+        recover_size_and_print((long long)opts->dset_size[i], " ");
+    HDfprintf(output, "\n");
+
+
+    HDfprintf(output, "Transfer buffer size=");
+    for (i=0; i<rank; i++)
+        recover_size_and_print((long long)opts->buf_size[i], " ");
+    HDfprintf(output, "\n");
+
+    HDfprintf(output, "Dimension access order=");
+    for (i=0; i<rank; i++)
+        recover_size_and_print((long long)opts->order[i], " ");
+    HDfprintf(output, "\n");
+
+    if (opts->io_types & SIO_HDF5) {
+
+        HDfprintf(output, "HDF5 data storage method=");
+
+        if (opts->h5_use_chunks){
+
+            HDfprintf(output, "Chunked\n");
+            HDfprintf(output, "HDF5 chunk size=");
+            for (i=0; i<rank; i++)
+                recover_size_and_print((long long)opts->chk_size[i], " ");
+            HDfprintf(output, "\n");
+
+            HDfprintf(output, "HDF5 dataset dimensions=");
+            if (opts->h5_extendable) {
+                HDfprintf(output, "Extendable\n");
+            }
+            else {
+                HDfprintf(output, "Fixed\n");
+            }
+        }
+        else {
+            HDfprintf(output, "Contiguous\n");
+        }
+
+        HDfprintf(output, "HDF5 file driver=");
+        if (opts->vfd==sec2) {
+            HDfprintf(output, "sec2\n");
+        } else if (opts->vfd==stdio) {
+            HDfprintf(output, "stdio\n");
+        } else if (opts->vfd==core) {
+            HDfprintf(output, "core\n");
+        } else if (opts->vfd==split) {
+            HDfprintf(output, "split\n");
+        } else if (opts->vfd==multi) {
+            HDfprintf(output, "multi\n");
+        } else if (opts->vfd==family) {
+            HDfprintf(output, "family\n");
+        } else if (opts->vfd==direct) {
+            HDfprintf(output, "direct\n");
+        }
+    }
+
+    {
+        char *prefix = HDgetenv("HDF5_PREFIX");
+
+        HDfprintf(output, "Env HDF5_PREFIX=%s\n",
+                  (prefix ? prefix : "not set"));
+    }
+
+    HDfprintf(output, "==== End of Parameters ====\n");
+    HDfprintf(output, "\n");
+}
+
+/*
+ * Function:    parse_command_line
+ * Purpose:     Parse the command line options and return a STRUCT OPTIONS
+ *              structure which will need to be freed by the calling function.
+ * Return:      Pointer to an OPTIONS structure
+ * Programmer:  Bill Wendling, 31. October 2001
+ * Modifications:
+ *    Added multidimensional testing (Christian Chilan, April, 2008)
+ */
+static struct options *
+parse_command_line(int argc, char *argv[])
+{
+    register int opt;
+    struct options *cl_opts;
+    int i, default_rank, actual_rank, ranks[4];
+    cl_opts = (struct options *)malloc(sizeof(struct options));
+
+    cl_opts->output_file = NULL;
+    cl_opts->io_types =  0;    /* will set default after parsing options */
+    cl_opts->num_iters = 1;
+
+    default_rank = 2;
+
+    cl_opts->dset_rank = 0;
+    cl_opts->buf_rank = 0;
+    cl_opts->chk_rank = 0;
+    cl_opts->order_rank = 0;
+
+    for (i=0; i<MAX_DIMS; i++){
+        cl_opts->buf_size[i]=(i+1)*10;
+        cl_opts->dset_size[i]=(i+1)*100;
+        cl_opts->chk_size[i]=(i+1)*10;
+        cl_opts->order[i]=i+1;
+    }
+
+    cl_opts->vfd = sec2;
+
+    cl_opts->print_times = FALSE;   /* Printing times is off by default */
+    cl_opts->print_raw = FALSE;     /* Printing raw data throughput is off by default */
+    cl_opts->h5_alignment = 1;      /* No alignment for HDF5 objects by default */
+    cl_opts->h5_threshold = 1;      /* No threshold for aligning HDF5 objects by default */
+    cl_opts->h5_use_chunks = FALSE; /* Don't chunk the HDF5 dataset by default */
+    cl_opts->h5_write_only = FALSE; /* Do both read and write by default */
+    cl_opts->h5_extendable = FALSE; /* Use extendable dataset */
+    cl_opts->verify = FALSE;        /* No Verify data correctness by default */
+
+    while ((opt = get_option(argc, (const char **)argv, s_opts, l_opts)) != EOF) {
+        switch ((char)opt) {
+        case 'a':
+            cl_opts->h5_alignment = parse_size_directive(opt_arg);
+            break;
+        case 'A':
+            {
+                const char *end = opt_arg;
+                while (end && *end != '\0') {
+                    char buf[10];
+
+                    memset(buf, '\0', sizeof(buf));
+
+                    for (i = 0; *end != '\0' && *end != ','; ++end)
+                        if (isalnum(*end) && i < 10)
+                            buf[i++] = *end;
+
+                    if (!HDstrcasecmp(buf, "hdf5")) {
+                        cl_opts->io_types |= SIO_HDF5;
+                    } else if (!HDstrcasecmp(buf, "posix")) {
+                        cl_opts->io_types |= SIO_POSIX;
+                    } else {
+                        fprintf(stderr, "sio_perf: invalid --api option %s\n",
+                                buf);
+                        exit(EXIT_FAILURE);
+                    }
+
+                    if (*end == '\0')
+                        break;
+
+                    end++;
+                }
+            }
+
+            break;
+#if 0
+        case 'b':
+            /* the future "binary" option */
+            break;
+#endif  /* 0 */
+        case 'c':
+            /* Turn on chunked HDF5 dataset creation */
+            cl_opts->h5_use_chunks = 1;
+            {
+                const char *end = opt_arg;
+                int j = 0;
+
+                while (end && *end != '\0') {
+                    char buf[10];
+
+                    memset(buf, '\0', sizeof(buf));
+
+                    for (i = 0; *end != '\0' && *end != ','; ++end)
+                        if (isalnum(*end) && i < 10)
+                            buf[i++] = *end;
+
+                    cl_opts->chk_size[j] = parse_size_directive(buf);
+
+                    j++;
+
+                    if (*end == '\0')
+                        break;
+
+                    end++;
+                }
+                cl_opts->chk_rank = j;
+            }
+
+            break;
+
+
+        case 'D':
+            {
+                const char *end = opt_arg;
+
+                while (end && *end != '\0') {
+                    char buf[10];
+
+                    memset(buf, '\0', sizeof(buf));
+
+                    for (i = 0; *end != '\0' && *end != ','; ++end)
+                        if (isalnum(*end) && i < 10)
+                            buf[i++] = *end;
+
+                    if (strlen(buf) > 1 || isdigit(buf[0])) {
+                        size_t j;
+
+                        for (j = 0; j < 10 && buf[j] != '\0'; ++j)
+                            if (!isdigit(buf[j])) {
+                                fprintf(stderr, "sio_perf: invalid --debug option %s\n",
+                                        buf);
+                                exit(EXIT_FAILURE);
+                            }
+
+                        sio_debug_level = atoi(buf);
+
+                        if (sio_debug_level > 4)
+                            sio_debug_level = 4;
+                        else if (sio_debug_level < 0)
+                            sio_debug_level = 0;
+                    } else {
+                        switch (*buf) {
+                        case 'r':
+                            /* Turn on raw data throughput info */
+                            cl_opts->print_raw = TRUE;
+                            break;
+                        case 't':
+                            /* Turn on time printing */
+                            cl_opts->print_times = TRUE;
+                            break;
+            case 'v':
+                            /* Turn on verify data correctness*/
+                cl_opts->verify = TRUE;
+                break;
+                        default:
+                            fprintf(stderr, "sio_perf: invalid --debug option %s\n", buf);
+                            exit(EXIT_FAILURE);
+                        }
+                    }
+
+                    if (*end == '\0')
+                        break;
+
+                    end++;
+                }
+            }
+
+            break;
+        case 'e':
+            {
+                const char *end = opt_arg;
+                int j = 0;
+
+                while (end && *end != '\0') {
+                    char buf[10];
+
+                    memset(buf, '\0', sizeof(buf));
+
+                    for (i = 0; *end != '\0' && *end != ','; ++end)
+                        if (isalnum(*end) && i < 10)
+                            buf[i++] = *end;
+
+                    cl_opts->dset_size[j] = parse_size_directive(buf);
+
+                    j++;
+
+                    if (*end == '\0')
+                        break;
+
+                    end++;
+                }
+                cl_opts->dset_rank = j;
+            }
+
+            break;
+
+        case 'i':
+            cl_opts->num_iters = atoi(opt_arg);
+            break;
+        case 'o':
+            cl_opts->output_file = opt_arg;
+            break;
+        case 'T':
+            cl_opts->h5_threshold = parse_size_directive(opt_arg);
+            break;
+        case 'v':
+            if (!HDstrcasecmp(opt_arg, "sec2")) {
+                cl_opts->vfd=sec2;
+            } else if (!HDstrcasecmp(opt_arg, "stdio")) {
+                cl_opts->vfd=stdio;
+            } else if (!HDstrcasecmp(opt_arg, "core")) {
+                cl_opts->vfd=core;
+            } else if (!HDstrcasecmp(opt_arg, "split")) {
+                cl_opts->vfd=split;
+            } else if (!HDstrcasecmp(opt_arg, "multi")) {
+                cl_opts->vfd=multi;
+            } else if (!HDstrcasecmp(opt_arg, "family")) {
+                cl_opts->vfd=family;
+            } else if (!HDstrcasecmp(opt_arg, "direct")) {
+                cl_opts->vfd=direct;
+            } else {
+                fprintf(stderr, "sio_perf: invalid --api option %s\n",
+                                opt_arg);
+                exit(EXIT_FAILURE);
+            }
+            break;
+        case 'w':
+            cl_opts->h5_write_only = TRUE;
+            break;
+        case 't':
+            cl_opts->h5_extendable = TRUE;
+            break;
+        case 'x':
+            {
+                const char *end = opt_arg;
+                int j = 0;
+
+                while (end && *end != '\0') {
+                    char buf[10];
+
+                    memset(buf, '\0', sizeof(buf));
+
+                    for (i = 0; *end != '\0' && *end != ','; ++end)
+                        if (isalnum(*end) && i < 10)
+                            buf[i++] = *end;
+
+                    cl_opts->buf_size[j] = parse_size_directive(buf);
+
+                    j++;
+
+                    if (*end == '\0')
+                        break;
+
+                    end++;
+                }
+                cl_opts->buf_rank = j;
+            }
+
+            break;
+
+        case 'r':
+            {
+                const char *end = opt_arg;
+                int j = 0;
+
+                while (end && *end != '\0') {
+                    char buf[10];
+
+                    memset(buf, '\0', sizeof(buf));
+
+                    for (i = 0; *end != '\0' && *end != ','; ++end)
+                        if (isalnum(*end) && i < 10)
+                            buf[i++] = *end;
+
+                    cl_opts->order[j] = parse_size_directive(buf);
+
+                    j++;
+
+                    if (*end == '\0')
+                        break;
+
+                    end++;
+                }
+
+                cl_opts->order_rank = j;
+            }
+
+            break;
+
+        case 'h':
+        case '?':
+        default:
+            usage(progname);
+            free(cl_opts);
+            return NULL;
+        }
+    }
+
+    /* perform rank consistency analysis */
+    actual_rank = 0;
+
+    ranks[0] = cl_opts->dset_rank;
+    ranks[1] = cl_opts->buf_rank;
+    ranks[2] = cl_opts->order_rank;
+    ranks[3] = cl_opts->chk_rank;
+
+    for (i=0; i<4; i++) {
+        if (ranks[i]>0) {
+            if (!actual_rank) {
+                actual_rank = ranks[i];
+            }
+            else {
+                if (actual_rank != ranks[i])
+                    exit(EXIT_FAILURE);
+            }
+        }
+    }
+
+    if (!actual_rank)
+        actual_rank = default_rank;
+
+    cl_opts->dset_rank = actual_rank;
+    cl_opts->buf_rank = actual_rank;
+    cl_opts->order_rank = actual_rank;
+    cl_opts->chk_rank = actual_rank;
+
+    for (i=0; i<actual_rank; i++) {
+        if (cl_opts->order[i] > actual_rank) {
+            exit(EXIT_FAILURE);
+        }
+    }
+
+    /* set default if none specified yet */
+    if (!cl_opts->io_types)
+        cl_opts->io_types = SIO_HDF5 | SIO_POSIX; /* run all API */
+
+    /* verify parameters sanity.  Adjust if needed. */
+    /* cap xfer_size with bytes per process */
+    if (cl_opts->num_iters <= 0)
+        cl_opts->num_iters = 1;
+
+    return cl_opts;
+}
+
+/*
+ * Function:    parse_size_directive
+ * Purpose:     Parse the size directive passed on the commandline. The size
+ *              directive is an integer followed by a size indicator:
+ *
+ *                  K, k - Kilobyte
+ *                  M, m - Megabyte
+ *                  G, g - Gigabyte
+ *
+ * Return:      The size as a off_t because this is related to file size.
+ *              If an unknown size indicator is used, then the program will
+ *              exit with EXIT_FAILURE as the return value.
+ * Programmer:  Bill Wendling, 18. December 2001
+ * Modifications:
+ */
+
+static off_t
+parse_size_directive(const char *size)
+{
+    off_t s;
+    char *endptr;
+
+    s = strtol(size, &endptr, 10);
+
+    if (endptr && *endptr) {
+        while (*endptr != '\0' && (*endptr == ' ' || *endptr == '\t'))
+            ++endptr;
+
+        switch (*endptr) {
+            case 'K':
+            case 'k':
+                s *= ONE_KB;
+                break;
+            case 'M':
+            case 'm':
+                s *= ONE_MB;
+                break;
+            case 'G':
+            case 'g':
+                s *= ONE_GB;
+                break;
+            default:
+                fprintf(stderr, "Illegal size specifier '%c'\n", *endptr);
+                exit(EXIT_FAILURE);
+        }
+    }
+
+    return s;
+}
+
+/*
+ * Function:    usage
+ * Purpose:     Print a usage message and then exit.
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 31. October 2001
+ * Modifications:
+ */
+static void
+usage(const char *prog)
+{
+	print_version(prog);
+        printf("usage: %s [OPTIONS]\n", prog);
+        printf("  OPTIONS\n");
+        printf("     -h                Print an usage message and exit\n");
+        printf("     -A AL             Which APIs to test\n");
+        printf("                       [default: all of them]\n");
+        printf("     -c SL             Selects chunked storage and defines chunks dimensions\n");
+        printf("                       and sizes\n");
+        printf("                       [default: Off]\n");
+        printf("     -e SL             Dimensions and sizes of dataset\n");
+        printf("                       [default: 100,200]\n");
+        printf("     -i N              Number of iterations to perform\n");
+        printf("                       [default: 1]\n");
+        printf("     -r NL             Dimension access order (see below for description)\n");
+        printf("                       [default: 1,2]\n");
+        printf("     -t                Selects extendable dimensions for HDF5 dataset\n");
+        printf("                       [default: Off]\n");
+        printf("     -v VFD            Selects file driver for HDF5 access\n");
+        printf("                       [default: sec2]\n");
+        printf("     -w                Perform write tests, not the read tests\n");
+        printf("                       [default: Off]\n");
+        printf("     -x SL             Dimensions and sizes of the transfer buffer\n");
+        printf("                       [default: 10,20]\n");
+        printf("\n");
+        printf("  N  - is an integer > 0.\n");
+        printf("\n");
+        printf("  S  - is a size specifier, an integer > 0 followed by a size indicator:\n");
+        printf("          K - Kilobyte (%d)\n", ONE_KB);
+        printf("          M - Megabyte (%d)\n", ONE_MB);
+        printf("          G - Gigabyte (%d)\n", ONE_GB);
+        printf("\n");
+        printf("      Example: '37M' is 37 megabytes or %d bytes\n", 37*ONE_MB);
+        printf("\n");
+        printf("  AL - is an API list. Valid values are:\n");
+        printf("          hdf5 - HDF5\n");
+        printf("          posix - POSIX\n");
+        printf("\n");
+        printf("      Example: -A posix,hdf5\n");
+        printf("\n");
+        printf("  NL - is list of integers (N) separated by commas.\n");
+        printf("\n");
+        printf("      Example: 1,2,3\n");
+        printf("\n");
+        printf("  SL - is list of size specifiers (S) separated by commas.\n");
+        printf("\n");
+        printf("      Example: 2K,2K,3K\n");
+        printf("\n");
+        printf("      The example defines an object (dataset, tranfer buffer) with three\n");
+        printf("      dimensions. Be aware that as the number of dimensions increases, the\n");
+        printf("      the total size of the object increases exponentially.\n");
+        printf("\n");
+        printf("  VFD  - is an HDF5 file driver specifier. Valid values are:\n");
+        printf("          sec2, stdio, core, split, multi, family, direct\n");
+        printf("\n");
+        printf("  Dimension access order:\n");
+        printf("      Data access starts at the cardinal origin of the dataset using the\n");
+        printf("      transfer buffer. The next access occurs on a dataset region next to\n");
+        printf("      the previous one. For a multidimensional dataset, there are several\n");
+        printf("      directions as to where to proceed. This can be specified in the dimension\n");
+        printf("      access order. For example, -r 1,2 states that the tool should traverse\n");
+        printf("      dimension 1 first, and then dimension 2.\n");
+        printf("\n");
+        printf("  Environment variables:\n");
+        printf("      HDF5_NOCLEANUP   Do not remove data files if set [default remove]\n");
+        printf("      HDF5_PREFIX      Data file prefix\n");
+        printf("\n");
+        fflush(stdout);
+}
+
diff --git a/tools/perform/sio_perf.h b/tools/perform/sio_perf.h
new file mode 100644
index 0000000..b40fed3
--- /dev/null
+++ b/tools/perform/sio_perf.h
@@ -0,0 +1,104 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef SIO_PERF_H__
+#define SIO_PERF_H__
+
+#include "sio_timer.h"
+#ifndef STANDALONE
+#include "H5private.h"
+#include "h5test.h"
+#include "h5tools.h"
+#include "h5tools_utils.h"
+#else
+#include "sio_standalone.h"
+#endif
+
+/* setup the dataset no fill option if this is v1.5 or more */
+#if H5_VERS_MAJOR > 1 || H5_VERS_MINOR > 4
+#define H5_HAVE_NOFILL 1
+#endif
+
+#define MAX_DIMS 32
+
+typedef enum iotype_ {
+    POSIXIO,
+    HDF5
+    /*NUM_TYPES*/
+} iotype;
+
+typedef enum vfdtype_ {
+    sec2,
+    stdio,
+    core,
+    split,
+    multi,
+    family,
+    direct
+    /*NUM_TYPES*/
+} vfdtype;
+
+typedef struct parameters_ {
+    iotype  io_type;        /* The type of IO test to perform       */
+    vfdtype     vfd;
+    long  num_files;      /* Number of files to create            */
+    long  num_dsets;      /* Number of datasets to create         */
+    off_t  num_bytes;      /* Number of bytes in each dset         */
+    int         num_iters;      /* Number of times to loop doing the IO */
+    int         rank;           /* Rank of dataset */
+    off_t   dset_size[MAX_DIMS]; /* Dataset size             */
+    size_t   buf_size[MAX_DIMS]; /* Buffer size               */
+    size_t   chk_size[MAX_DIMS]; /* Chunk size               */
+    int    order[MAX_DIMS]; /* Buffer size               */
+    hsize_t   h5_align;       /* HDF5 object alignment                */
+    hsize_t   h5_thresh;      /* HDF5 object alignment threshold      */
+    int   h5_use_chunks;  /* Make HDF5 dataset chunked            */
+    int   h5_extendable;  /* Make HDF5 dataset chunked            */
+    int      h5_write_only;  /* Perform the write tests only         */
+    int   verify;      /* Verify data correctness              */
+} parameters;
+
+typedef struct results_ {
+    herr_t      ret_code;
+    sio_time   *timers;
+} results;
+
+#ifndef SUCCESS
+#define SUCCESS     0
+#endif  /* !SUCCESS */
+
+#ifndef FAIL
+#define FAIL        -1
+#endif  /* !FAIL */
+
+extern FILE     *output;            /* output file                          */
+extern sio_time *timer_g;           /* timer: global for stub functions     */
+extern int      sio_debug_level;    /* The debug level:
+                                     *   0 - Off
+                                     *   1 - Minimal
+                                     *   2 - Some more
+                                     *   3 - Maximal
+                                     *   4 - Even More Debugging (timer stuff)
+                                     */
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+
+extern results do_sio(parameters param);
+
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
+#endif  /* PIO_PERF_H__ */
diff --git a/tools/perform/sio_standalone.c b/tools/perform/sio_standalone.c
new file mode 100644
index 0000000..d92ed30
--- /dev/null
+++ b/tools/perform/sio_standalone.c
@@ -0,0 +1,285 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+
+/* This file contains the definition of functions required to build h5perf in
+ * STANDALONE mode.
+ * Created: Christian Chilan, 2005/5/18.
+ */
+
+#include "sio_perf.h"
+
+
+/** From h5tools_utils.c **/
+
+/* global variables */
+int   nCols = 80;
+
+/* ``get_option'' variables */
+int         opt_err = 1;    /*get_option prints errors if this is on */
+int         opt_ind = 1;    /*token pointer                          */
+const char *opt_arg;        /*flag argument (or value)               */
+
+
+int
+get_option(int argc, const char **argv, const char *opts, const struct long_options *l_opts)
+{
+    static int sp = 1;    /* character index in current token */
+    int opt_opt = '?';    /* option character passed back to user */
+
+    if (sp == 1) {
+        /* check for more flag-like tokens */
+        if (opt_ind >= argc || argv[opt_ind][0] != '-' || argv[opt_ind][1] == '\0') {
+            return EOF;
+        } else if (HDstrcmp(argv[opt_ind], "--") == 0) {
+            opt_ind++;
+            return EOF;
+        }
+    }
+
+    if (sp == 1 && argv[opt_ind][0] == '-' && argv[opt_ind][1] == '-') {
+        /* long command line option */
+        const char *arg = &argv[opt_ind][2];
+        int i;
+
+        for (i = 0; l_opts && l_opts[i].name; i++) {
+            size_t len = HDstrlen(l_opts[i].name);
+
+            if (HDstrncmp(arg, l_opts[i].name, len) == 0) {
+                /* we've found a matching long command line flag */
+                opt_opt = l_opts[i].shortval;
+
+                if (l_opts[i].has_arg != no_arg) {
+                    if (arg[len] == '=') {
+                        opt_arg = &arg[len + 1];
+                    } else if (opt_ind < (argc - 1) && argv[opt_ind + 1][0] != '-') {
+                        opt_arg = argv[++opt_ind];
+                    } else if (l_opts[i].has_arg == require_arg) {
+                        if (opt_err)
+                            HDfprintf(stderr,
+                                    "%s: option required for \"--%s\" flag\n",
+                                    argv[0], arg);
+
+                        opt_opt = '?';
+                    }
+                } else {
+                    if (arg[len] == '=') {
+                        if (opt_err)
+                            HDfprintf(stderr,
+                                    "%s: no option required for \"%s\" flag\n",
+                                    argv[0], arg);
+
+                        opt_opt = '?';
+                    }
+
+                    opt_arg = NULL;
+                }
+
+                break;
+            }
+        }
+
+        if (l_opts[i].name == NULL) {
+            /* exhausted all of the l_opts we have and still didn't match */
+            if (opt_err)
+                HDfprintf(stderr, "%s: unknown option \"%s\"\n", argv[0], arg);
+
+            opt_opt = '?';
+        }
+
+        opt_ind++;
+        sp = 1;
+    } else {
+        register char *cp;    /* pointer into current token */
+
+        /* short command line option */
+        opt_opt = argv[opt_ind][sp];
+
+        if (opt_opt == ':' || (cp = strchr(opts, opt_opt)) == 0) {
+
+            if (opt_err)
+                HDfprintf(stderr, "%s: unknown option \"%c\"\n",
+                        argv[0], opt_opt);
+
+            /* if no chars left in this token, move to next token */
+            if (argv[opt_ind][++sp] == '\0') {
+                opt_ind++;
+                sp = 1;
+            }
+
+            return '?';
+        }
+
+        if (*++cp == ':') {
+            /* if a value is expected, get it */
+            if (argv[opt_ind][sp + 1] != '\0') {
+                /* flag value is rest of current token */
+                opt_arg = &argv[opt_ind++][sp + 1];
+            } else if (++opt_ind >= argc) {
+                if (opt_err)
+                    HDfprintf(stderr,
+                            "%s: value expected for option \"%c\"\n",
+                            argv[0], opt_opt);
+
+                opt_opt = '?';
+            } else {
+                /* flag value is next token */
+                opt_arg = argv[opt_ind++];
+            }
+
+            sp = 1;
+        } else {
+            /* set up to look at next char in token, next time */
+            if (argv[opt_ind][++sp] == '\0') {
+                /* no more in current token, so setup next token */
+                opt_ind++;
+                sp = 1;
+            }
+
+            opt_arg = NULL;
+        }
+    }
+
+    /* return the current flag character found */
+    return opt_opt;
+}
+
+
+void
+print_version(const char *progname)
+{
+    printf("%s: Version %u.%u.%u%s%s\n",
+           progname, H5_VERS_MAJOR, H5_VERS_MINOR, H5_VERS_RELEASE,
+           H5_VERS_SUBRELEASE[0] ? "-" : "", H5_VERS_SUBRELEASE);
+}
+
+
+
+/** From h5test.c **/
+
+#ifdef H5_HAVE_PARALLEL
+MPI_Info    h5_io_info_g=MPI_INFO_NULL;/* MPI INFO object for IO */
+#endif
+
+#if 0
+int
+h5_set_info_object(void)
+{
+    char	*envp;			/* environment pointer */
+    int		ret_value=0;
+
+    /* handle any MPI INFO hints via $HDF5_MPI_INFO */
+    if ((envp = getenv("HDF5_MPI_INFO")) != NULL){
+        char *next, *valp;
+
+
+        valp = envp = next = HDstrdup(envp);
+
+        /* create an INFO object if not created yet */
+        if (h5_io_info_g == MPI_INFO_NULL)
+            MPI_Info_create(&h5_io_info_g);
+
+        do {
+            size_t len;
+            char *key_val, *endp, *namep;
+
+            if (*valp == ';')
+                valp++;
+
+            /* copy key/value pair into temporary buffer */
+            len = strcspn(valp, ";");
+            next = &valp[len];
+            key_val = calloc(1, len + 1);
+
+            /* increment the next pointer past the terminating semicolon */
+            if (*next == ';')
+                ++next;
+
+            namep = HDstrncpy(key_val, valp, len);
+
+            /* pass up any beginning whitespaces */
+            while (*namep && (*namep == ' ' || *namep == '\t'))
+                namep++;
+
+            /* eat up any ending white spaces */
+            endp = &namep[strlen(namep) - 1];
+
+            while (endp && (*endp == ' ' || *endp == '\t'))
+                *endp-- = '\0';
+
+            /* find the '=' */
+
+            valp = HDstrchr(namep, '=');
+
+            if (valp != NULL) {     /* it's a valid key/value pairing */
+                char *tmp_val = valp + 1;
+
+                /* change '=' to \0, move valp down one */
+                *valp-- = '\0';
+
+                /* eat up ending whitespace on the "key" part */
+                while (*valp == ' ' || *valp == '\t')
+                    *valp-- = '\0';
+
+                valp = tmp_val;
+
+                /* eat up beginning whitespace on the "value" part */
+                while (*valp == ' ' || *valp == '\t')
+                    *valp++ = '\0';
+
+                /* actually set the darned thing */
+                if (MPI_SUCCESS != MPI_Info_set(h5_io_info_g, namep, valp)) {
+                    printf("MPI_Info_set failed\n");
+                    ret_value = -1;
+                }
+            }
+
+            valp = next;
+            HDfree(key_val);
+        } while (next && *next);
+
+        HDfree(envp);
+    }
+
+    return ret_value;
+}
+
+
+void
+h5_dump_info_object(MPI_Info info)
+{
+    char	key[MPI_MAX_INFO_KEY+1];
+    char	value[MPI_MAX_INFO_VAL+1];
+    int  	flag;
+    int		i, nkeys;
+
+    printf("Dumping MPI Info Object(%d) (up to %d bytes per item):\n", (int)info,
+	MPI_MAX_INFO_VAL);
+    if (info==MPI_INFO_NULL){
+	printf("object is MPI_INFO_NULL\n");
+    }
+    else {
+	MPI_Info_get_nkeys(info, &nkeys);
+	printf("object has %d items\n", nkeys);
+	for (i=0; i<nkeys; i++){
+	    MPI_Info_get_nthkey(info, i, key);
+	    MPI_Info_get(info, key, MPI_MAX_INFO_VAL, value, &flag);
+	    printf("%s=%s\n", key, value);
+	}
+
+    }
+}
+
+#endif
+
diff --git a/tools/perform/sio_standalone.h b/tools/perform/sio_standalone.h
new file mode 100644
index 0000000..b2f8220
--- /dev/null
+++ b/tools/perform/sio_standalone.h
@@ -0,0 +1,528 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef SIO_STANDALONE_H__
+#define SIO_PERF_H__
+
+/* Header file for building h5perf by standalone mode.
+ * Created: Christian Chilan, 2005/5/18.
+ */
+
+/** From H5private.h **/
+
+#include "H5public.h"     /* Include Public Definitions    */
+
+
+/*
+ * Include ANSI-C header files.
+ */
+#ifdef H5_STDC_HEADERS
+#   include <assert.h>
+#   include <ctype.h>
+#   include <errno.h>
+#   include <fcntl.h>
+#   include <float.h>
+#   include <limits.h>
+#   include <math.h>
+#   include <signal.h>
+#   include <stdarg.h>
+#   include <stdio.h>
+#   include <stdlib.h>
+#   include <string.h>
+#endif
+
+/* maximum of two, three, or four values */
+#undef MAX
+#define MAX(a,b)                (((a)>(b)) ? (a) : (b))
+#define MAX2(a,b)               MAX(a,b)
+#define MAX3(a,b,c)             MAX(a,MAX(b,c))
+#define MAX4(a,b,c,d)           MAX(MAX(a,b),MAX(c,d))
+
+/*
+ * A macro to portably increment enumerated types.
+ */
+#ifndef H5_INC_ENUM
+#  define H5_INC_ENUM(TYPE,VAR) (VAR)=((TYPE)((VAR)+1))
+#endif
+
+/*
+ * Redefine all the POSIX functions.  We should never see a POSIX
+ * function (or any other non-HDF5 function) in the source!
+ */
+#define HDabort()               abort()
+#define HDabs(X)                abs(X)
+#ifdef H5_HAVE_WIN32_API
+#define HDaccess(F,M)           _access(F, M)
+#define R_OK    4       /* Test for read permission.  */
+#define W_OK    2       /* Test for write permission.  */
+#define X_OK    1       /* Test for execute permission.  */
+#define F_OK    0       /* Test for existence.  */
+#else /* H5_HAVE_WIN32_API */
+#define HDaccess(F,M)           access(F, M)
+#endif /* H5_HAVE_WIN32_API */
+#define HDacos(X)               acos(X)
+#ifdef H5_HAVE_ALARM
+#define HDalarm(N)              alarm(N)
+#else /* H5_HAVE_ALARM */
+#define HDalarm(N)              (0)
+#endif /* H5_HAVE_ALARM */
+#define HDasctime(T)            asctime(T)
+#define HDasin(X)               asin(X)
+#define HDasprintf              asprintf /*varargs*/
+#define HDassert(X)             assert(X)
+#define HDatan(X)               atan(X)
+#define HDatan2(X,Y)            atan2(X,Y)
+#define HDatexit(F)             atexit(F)
+#define HDatof(S)               atof(S)
+#define HDatoi(S)               atoi(S)
+#define HDatol(S)               atol(S)
+#define HDBSDgettimeofday(S,P)  BSDgettimeofday(S,P)
+#define HDbsearch(K,B,N,Z,F)    bsearch(K,B,N,Z,F)
+#define HDcalloc(N,Z)           calloc(N,Z)
+#define HDceil(X)               ceil(X)
+#define HDcfgetispeed(T)        cfgetispeed(T)
+#define HDcfgetospeed(T)        cfgetospeed(T)
+#define HDcfsetispeed(T,S)      cfsetispeed(T,S)
+#define HDcfsetospeed(T,S)      cfsetospeed(T,S)
+#define HDchdir(S)              chdir(S)
+#define HDchmod(S,M)            chmod(S,M)
+#define HDchown(S,O,G)          chown(S,O,G)
+#define HDclearerr(F)           clearerr(F)
+#define HDclock()               clock()
+#define HDclose(F)              close(F)
+#define HDclosedir(D)           closedir(D)
+#define HDcos(X)                cos(X)
+#define HDcosh(X)               cosh(X)
+#define HDcreat(S,M)            creat(S,M)
+#define HDctermid(S)            ctermid(S)
+#define HDctime(T)              ctime(T)
+#define HDcuserid(S)            cuserid(S)
+#ifdef H5_HAVE_DIFFTIME
+#define HDdifftime(X,Y)         difftime(X,Y)
+#else
+#define HDdifftime(X,Y)         ((double)(X)-(double)(Y))
+#endif
+#define HDdiv(X,Y)              div(X,Y)
+#define HDdup(F)                dup(F)
+#define HDdup2(F,I)             dup2(F,I)
+/* execl() variable arguments */
+/* execle() variable arguments */
+/* execlp() variable arguments */
+#define HDexecv(S,AV)           execv(S,AV)
+#define HDexecve(S,AV,E)        execve(S,AV,E)
+#define HDexecvp(S,AV)          execvp(S,AV)
+#define HDexit(N)               exit(N)
+#define HD_exit(N)              _exit(N)
+#define HDexp(X)                exp(X)
+#define HDfabs(X)               fabs(X)
+/* use ABS() because fabsf() fabsl() are not common yet. */
+#define HDfabsf(X)              ABS(X)
+#define HDfabsl(X)              ABS(X)
+#define HDfclose(F)             fclose(F)
+/* fcntl() variable arguments */
+#define HDfdopen(N,S)           fdopen(N,S)
+#define HDfeof(F)               feof(F)
+#define HDferror(F)             ferror(F)
+#define HDfflush(F)             fflush(F)
+#define HDfgetc(F)              fgetc(F)
+#define HDfgetpos(F,P)          fgetpos(F,P)
+#define HDfgets(S,N,F)          fgets(S,N,F)
+#ifdef H5_HAVE_WIN32_API
+#define HDfileno(F)             _fileno(F)
+#else /* H5_HAVE_WIN32_API */
+#define HDfileno(F)             fileno(F)
+#endif /* H5_HAVE_WIN32_API */
+#define HDfloor(X)              floor(X)
+#define HDfmod(X,Y)             fmod(X,Y)
+#define HDfopen(S,M)            fopen(S,M)
+#define HDfork()                fork()
+#define HDfpathconf(F,N)        fpathconf(F,N)
+H5_DLL int HDfprintf (FILE *stream, const char *fmt, ...);
+#define HDfputc(C,F)            fputc(C,F)
+#define HDfputs(S,F)            fputs(S,F)
+#define HDfread(M,Z,N,F)        fread(M,Z,N,F)
+#define HDfree(M)               free(M)
+#define HDfreopen(S,M,F)        freopen(S,M,F)
+#define HDfrexp(X,N)            frexp(X,N)
+/* Check for Cray-specific 'frexpf()' and 'frexpl()' routines */
+#ifdef H5_HAVE_FREXPF
+#define HDfrexpf(X,N)           frexpf(X,N)
+#else /* H5_HAVE_FREXPF */
+#define HDfrexpf(X,N)           frexp(X,N)
+#endif /* H5_HAVE_FREXPF */
+#ifdef H5_HAVE_FREXPL
+#define HDfrexpl(X,N)           frexpl(X,N)
+#else /* H5_HAVE_FREXPL */
+#define HDfrexpl(X,N)           frexp(X,N)
+#endif /* H5_HAVE_FREXPL */
+/* fscanf() variable arguments */
+#ifdef H5_HAVE_FSEEKO
+     #define HDfseek(F,O,W)     fseeko(F,O,W)
+#else
+     #define HDfseek(F,O,W)     fseek(F,O,W)
+#endif
+#define HDfsetpos(F,P)          fsetpos(F,P)
+/* definitions related to the file stat utilities.
+ * Windows have its own function names.
+ * For Unix, if off_t is not 64bit big, try use the pseudo-standard
+ * xxx64 versions if available.
+ */
+#ifdef H5_HAVE_WIN32_API
+    #define HDfstat(F,B)        _fstati64(F,B)
+    #define HDlstat(S,B)        _lstati64(S,B)
+    #define HDstat(S,B)         _stati64(S,B)
+    typedef struct _stati64     h5_stat_t;
+    typedef __int64             h5_stat_size_t;
+#elif H5_SIZEOF_OFF_T!=8 && H5_SIZEOF_OFF64_T==8 && defined(H5_HAVE_STAT64)
+    #define HDfstat(F,B)        fstat64(F,B)
+    #define HDlstat(S,B)        lstat64(S,B)
+    #define HDstat(S,B)         stat64(S,B)
+    typedef struct stat64       h5_stat_t;
+    typedef off64_t             h5_stat_size_t;
+#else
+    #define HDfstat(F,B)        fstat(F,B)
+    #define HDlstat(S,B)        lstat(S,B)
+    #define HDstat(S,B)         stat(S,B)
+    typedef struct stat         h5_stat_t;
+    typedef off_t               h5_stat_size_t;
+#endif
+
+#define HDftell(F)              ftell(F)
+#define HDftruncate(F,L)        ftruncate(F,L)
+#define HDfwrite(M,Z,N,F)       fwrite(M,Z,N,F)
+#define HDgetc(F)               getc(F)
+#define HDgetchar()             getchar()
+#define HDgetcwd(S,Z)           getcwd(S,Z)
+#define HDgetegid()             getegid()
+#define HDgetenv(S)             getenv(S)
+#define HDgeteuid()             geteuid()
+#define HDgetgid()              getgid()
+#define HDgetgrgid(G)           getgrgid(G)
+#define HDgetgrnam(S)           getgrnam(S)
+#define HDgetgroups(Z,G)        getgroups(Z,G)
+#ifdef H5_HAVE_VISUAL_STUDIO
+#define HDgetlogin()            Wgetlogin()
+#else /* H5_HAVE_VISUAL_STUDIO */
+#define HDgetlogin()            getlogin()
+#endif /* H5_HAVE_VISUAL_STUDIO */
+#define HDgetpgrp()             getpgrp()
+#define HDgetpid()              getpid()
+#define HDgetppid()             getppid()
+#define HDgetpwnam(S)           getpwnam(S)
+#define HDgetpwuid(U)           getpwuid(U)
+#define HDgetrusage(X,S)        getrusage(X,S)
+#define HDgets(S)               gets(S)
+#ifdef H5_HAVE_VISUAL_STUDIO
+    H5_DLL int Wgettimeofday(struct timeval *tv, struct timezone *tz);
+#define HDgettimeofday(V,Z) Wgettimeofday(V,Z)
+#else /* H5_HAVE_VISUAL_STUDIO */
+#define HDgettimeofday(S,P)     gettimeofday(S,P)
+#endif /* H5_HAVE_VISUAL_STUDIO */
+#define HDgetuid()              getuid()
+#define HDgmtime(T)             gmtime(T)
+#define HDisalnum(C)            isalnum((int)(C)) /*cast for solaris warning*/
+#define HDisalpha(C)            isalpha((int)(C)) /*cast for solaris warning*/
+#define HDisatty(F)             isatty(F)
+#define HDiscntrl(C)            iscntrl((int)(C)) /*cast for solaris warning*/
+#define HDisdigit(C)            isdigit((int)(C)) /*cast for solaris warning*/
+#define HDisgraph(C)            isgraph((int)(C)) /*cast for solaris warning*/
+#define HDislower(C)            islower((int)(C)) /*cast for solaris warning*/
+#define HDisprint(C)            isprint((int)(C)) /*cast for solaris warning*/
+#define HDispunct(C)            ispunct((int)(C)) /*cast for solaris warning*/
+#define HDisspace(C)            isspace((int)(C)) /*cast for solaris warning*/
+#define HDisupper(C)            isupper((int)(C)) /*cast for solaris warning*/
+#define HDisxdigit(C)           isxdigit((int)(C)) /*cast for solaris warning*/
+#define HDkill(P,S)             kill(P,S)
+#define HDlabs(X)               labs(X)
+#define HDldexp(X,N)            ldexp(X,N)
+#define HDldiv(X,Y)             ldiv(X,Y)
+#define HDlink(OLD,NEW)         link(OLD,NEW)
+#define HDlocaleconv()          localeconv()
+#define HDlocaltime(T)          localtime(T)
+#define HDlog(X)                log(X)
+#define HDlog10(X)              log10(X)
+#define HDlongjmp(J,N)          longjmp(J,N)
+#ifdef H5_HAVE_WIN32_API
+    #define HDlseek(F,O,W)  _lseeki64(F,O,W)
+#else
+    #ifdef H5_HAVE_LSEEK64
+        #define HDlseek(F,O,W)  lseek64(F,O,W)
+    #else
+        #define HDlseek(F,O,W)  lseek(F,O,W)
+    #endif
+#endif
+#define HDmalloc(Z)             malloc(Z)
+#define HDposix_memalign(P,A,Z) posix_memalign(P,A,Z)
+#define HDmblen(S,N)            mblen(S,N)
+#define HDmbstowcs(P,S,Z)       mbstowcs(P,S,Z)
+#define HDmbtowc(P,S,Z)         mbtowc(P,S,Z)
+#define HDmemchr(S,C,Z)         memchr(S,C,Z)
+#define HDmemcmp(X,Y,Z)         memcmp(X,Y,Z)
+/*
+ * The (char*) casts are required for the DEC when optimizations are turned
+ * on and the source and/or destination are not aligned.
+ */
+#define HDmemcpy(X,Y,Z)         memcpy((char*)(X),(const char*)(Y),Z)
+#define HDmemmove(X,Y,Z)        memmove((char*)(X),(const char*)(Y),Z)
+/*
+ * The (void*) cast just avoids a compiler warning in H5_HAVE_VISUAL_STUDIO
+ */
+#ifdef H5_HAVE_VISUAL_STUDIO
+#define HDmemset(X,C,Z)         memset((void*)(X),C,Z)
+#else /* H5_HAVE_VISUAL_STUDIO */
+#define HDmemset(X,C,Z)         memset(X,C,Z)
+#endif /* H5_HAVE_VISUAL_STUDIO */
+#ifdef H5_HAVE_WIN32_API
+#define HDmkdir(S,M)            _mkdir(S)
+#else /* H5_HAVE_WIN32_API */
+#define HDmkdir(S,M)            mkdir(S,M)
+#endif /* H5_HAVE_WIN32_API */
+#define HDmkfifo(S,M)           mkfifo(S,M)
+#define HDmktime(T)             mktime(T)
+#define HDmodf(X,Y)             modf(X,Y)
+#ifdef _O_BINARY
+#define HDopen(S,F,M)           open(S,F|_O_BINARY,M)
+#else
+#define HDopen(S,F,M)           open(S,F,M)
+#endif
+#define HDopendir(S)            opendir(S)
+#define HDpathconf(S,N)         pathconf(S,N)
+#define HDpause()               pause()
+#define HDperror(S)             perror(S)
+#define HDpipe(F)               pipe(F)
+#define HDpow(X,Y)              pow(X,Y)
+/* printf() variable arguments */
+#define HDputc(C,F)             putc(C,F)
+#define HDputchar(C)            putchar(C)
+#define HDputs(S)               puts(S)
+#define HDqsort(M,N,Z,F)        qsort(M,N,Z,F)
+#define HDraise(N)              raise(N)
+
+#ifdef H5_HAVE_RAND_R
+#define HDrandom()              HDrand()
+H5_DLL int HDrand(void);
+#elif H5_HAVE_RANDOM
+#define HDrand()                random()
+#define HDrandom()              random()
+#else
+#define HDrand()                rand()
+#define HDrandom()              rand()
+#endif
+
+#define HDread(F,M,Z)           read(F,M,Z)
+#define HDreaddir(D)            readdir(D)
+#define HDrealloc(M,Z)          realloc(M,Z)
+#ifdef H5_VMS
+#ifdef __cplusplus
+extern "C" {
+#endif
+int HDremove_all(const char * fname);
+#ifdef __cplusplus
+}
+#endif
+#define HDremove(S)             HDremove_all(S)
+#else
+#define HDremove(S)             remove(S)
+#endif /*H5_VMS*/
+#define HDrename(OLD,NEW)       rename(OLD,NEW)
+#define HDrewind(F)             rewind(F)
+#define HDrewinddir(D)          rewinddir(D)
+#define HDrmdir(S)              rmdir(S)
+/* scanf() variable arguments */
+#define HDsetbuf(F,S)           setbuf(F,S)
+#define HDsetgid(G)             setgid(G)
+#define HDsetjmp(J)             setjmp(J)
+#define HDsetlocale(N,S)        setlocale(N,S)
+#define HDsetpgid(P,PG)         setpgid(P,PG)
+#define HDsetsid()              setsid()
+#define HDsetuid(U)             setuid(U)
+/* Windows does not permit setting the buffer size to values
+   less than 2.  */
+#ifndef H5_HAVE_WIN32_API
+#define HDsetvbuf(F,S,M,Z)      setvbuf(F,S,M,Z)
+#else
+#define HDsetvbuf(F,S,M,Z)  setvbuf(F,S,M,(Z>1?Z:2))
+#endif
+#define HDsigaddset(S,N)        sigaddset(S,N)
+#define HDsigdelset(S,N)        sigdelset(S,N)
+#define HDsigemptyset(S)        sigemptyset(S)
+#define HDsigfillset(S)         sigfillset(S)
+#define HDsigismember(S,N)      sigismember(S,N)
+#define HDsiglongjmp(J,N)       siglongjmp(J,N)
+#define HDsignal(N,F)           signal(N,F)
+#define HDsigpending(S)         sigpending(S)
+#define HDsigprocmask(H,S,O)    sigprocmask(H,S,O)
+#define HDsigsetjmp(J,N)        sigsetjmp(J,N)
+#define HDsigsuspend(S)         sigsuspend(S)
+#define HDsin(X)                sin(X)
+#define HDsinh(X)               sinh(X)
+#define HDsleep(N)              sleep(N)
+#ifdef H5_HAVE_WIN32_API
+H5_DLL int c99_snprintf(char* str, size_t size, const char* format, ...);
+#define HDsnprintf          c99_snprintf /*varargs*/
+#else
+#define HDsnprintf              snprintf /*varargs*/
+#endif
+/* sprintf() variable arguments */
+#define HDsqrt(X)               sqrt(X)
+#ifdef H5_HAVE_RAND_R
+H5_DLL void HDsrand(unsigned int seed);
+#define HDsrandom(S)            HDsrand(S)
+#elif H5_HAVE_RANDOM
+#define HDsrand(S)              srandom(S)
+#define HDsrandom(S)            srandom(S)
+#else
+#define HDsrand(S)              srand(S)
+#define HDsrandom(S)            srand(S)
+#endif
+/* sscanf() variable arguments */
+
+#ifdef H5_HAVE_WIN32_API
+#define HDstrcasecmp(A,B)   _stricmp(A,B)
+#else
+#define HDstrcasecmp(X,Y)      strcasecmp(X,Y)
+#endif
+#define HDstrcat(X,Y)           strcat(X,Y)
+#define HDstrchr(S,C)           strchr(S,C)
+#define HDstrcmp(X,Y)           strcmp(X,Y)
+#define HDstrcoll(X,Y)          strcoll(X,Y)
+#define HDstrcpy(X,Y)           strcpy(X,Y)
+#define HDstrcspn(X,Y)          strcspn(X,Y)
+#define HDstrerror(N)           strerror(N)
+#define HDstrftime(S,Z,F,T)     strftime(S,Z,F,T)
+#define HDstrlen(S)             strlen(S)
+#define HDstrncat(X,Y,Z)        strncat(X,Y,Z)
+#define HDstrncmp(X,Y,Z)        strncmp(X,Y,Z)
+#define HDstrncpy(X,Y,Z)        strncpy(X,Y,Z)
+#define HDstrpbrk(X,Y)          strpbrk(X,Y)
+#define HDstrrchr(S,C)          strrchr(S,C)
+#define HDstrspn(X,Y)           strspn(X,Y)
+#define HDstrstr(X,Y)           strstr(X,Y)
+#define HDstrtod(S,R)           strtod(S,R)
+#define HDstrtok(X,Y)           strtok(X,Y)
+#define HDstrtol(S,R,N)         strtol(S,R,N)
+H5_DLL int64_t HDstrtoll (const char *s, const char **rest, int base);
+#define HDstrtoul(S,R,N)        strtoul(S,R,N)
+#define HDstrxfrm(X,Y,Z)        strxfrm(X,Y,Z)
+#define HDsysconf(N)            sysconf(N)
+#define HDsystem(S)             system(S)
+#define HDtan(X)                tan(X)
+#define HDtanh(X)               tanh(X)
+#define HDtcdrain(F)            tcdrain(F)
+#define HDtcflow(F,A)           tcflow(F,A)
+#define HDtcflush(F,N)          tcflush(F,N)
+#define HDtcgetattr(F,T)        tcgetattr(F,T)
+#define HDtcgetpgrp(F)          tcgetpgrp(F)
+#define HDtcsendbreak(F,N)      tcsendbreak(F,N)
+#define HDtcsetattr(F,O,T)      tcsetattr(F,O,T)
+#define HDtcsetpgrp(F,N)        tcsetpgrp(F,N)
+#define HDtime(T)               time(T)
+#define HDtimes(T)              times(T)
+#define HDtmpfile()             tmpfile()
+#define HDtmpnam(S)             tmpnam(S)
+#define HDtolower(C)            tolower(C)
+#define HDtoupper(C)            toupper(C)
+#define HDttyname(F)            ttyname(F)
+#define HDtzset()               tzset()
+#define HDumask(N)              umask(N)
+#define HDuname(S)              uname(S)
+#define HDungetc(C,F)           ungetc(C,F)
+#ifdef H5_HAVE_WIN32_API
+#define HDunlink(S)             _unlink(S)
+#else
+#define HDunlink(S)             unlink(S)
+#endif
+#define HDutime(S,T)            utime(S,T)
+#define HDva_arg(A,T)           va_arg(A,T)
+#define HDva_end(A)             va_end(A)
+#define HDva_start(A,P)         va_start(A,P)
+#define HDvasprintf(RET,FMT,A)  vasprintf(RET,FMT,A)
+#define HDvfprintf(F,FMT,A)     vfprintf(F,FMT,A)
+#define HDvprintf(FMT,A)        vprintf(FMT,A)
+#define HDvsprintf(S,FMT,A)     vsprintf(S,FMT,A)
+#ifdef H5_HAVE_WIN32_API
+H5_DLL int c99_vsnprintf(char* str, size_t size, const char* format, va_list ap);
+#define HDvsnprintf         c99_vsnprintf
+#else
+#   define HDvsnprintf(S,N,FMT,A) vsnprintf(S,N,FMT,A)
+#endif
+#define HDwait(W)               wait(W)
+#define HDwaitpid(P,W,O)        waitpid(P,W,O)
+#define HDwcstombs(S,P,Z)       wcstombs(S,P,Z)
+#define HDwctomb(S,C)           wctomb(S,C)
+#define HDwrite(F,M,Z)          write(F,M,Z)
+
+/*
+ * And now for a couple non-Posix functions...  Watch out for systems that
+ * define these in terms of macros.
+ */
+#ifdef H5_HAVE_WIN32_API
+#define HDstrdup(S)    _strdup(S)
+#else /* H5_HAVE_WIN32_API */
+
+#if !defined strdup && !defined H5_HAVE_STRDUP
+extern char *strdup(const char *s);
+#endif
+
+#define HDstrdup(S)     strdup(S)
+
+#endif /* H5_HAVE_WIN32_API */
+
+/*
+ * HDF Boolean type.
+ */
+#ifndef FALSE
+#   define FALSE 0
+#endif
+#ifndef TRUE
+#   define TRUE 1
+#endif
+
+/** From h5test.h **/
+
+#ifdef H5_HAVE_PARALLEL
+extern MPI_Info h5_io_info_g;         /* MPI INFO object for IO */
+#endif
+
+#ifdef H5_HAVE_PARALLEL
+H5TEST_DLL int h5_set_info_object(void);
+H5TEST_DLL void h5_dump_info_object(MPI_Info info);
+#endif
+
+
+
+/** From h5tools_utils.h **/
+
+extern int         opt_err;     /* getoption prints errors if this is on    */
+extern int         opt_ind;     /* token pointer                            */
+extern const char *opt_arg;     /* flag argument (or value)                 */
+
+
+enum {
+    no_arg = 0,         /* doesn't take an argument     */
+    require_arg,        /* requires an argument          */
+    optional_arg        /* argument is optional         */
+};
+
+
+typedef struct long_options {
+    const char  *name;          /* name of the long option              */
+    int          has_arg;       /* whether we should look for an arg    */
+    char         shortval;      /* the shortname equivalent of long arg
+                                 * this gets returned from get_option   */
+} long_options;
+
+extern int    get_option(int argc, const char **argv, const char *opt,
+                         const struct long_options *l_opt);
+#endif
diff --git a/tools/perform/sio_timer.c b/tools/perform/sio_timer.c
new file mode 100644
index 0000000..4e42ee6
--- /dev/null
+++ b/tools/perform/sio_timer.c
@@ -0,0 +1,197 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Purpose:
+ *
+ * This is a module of useful timing functions for performance testing.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "sio_timer.h"
+
+
+#include "sio_perf.h"
+
+/*
+ * The number to divide the tv_usec field with to get a nice decimal to add to
+ * the number of seconds.
+ */
+#define MICROSECOND     1000000.0
+
+/* global variables */
+sio_time   *timer_g;            /* timer: global for stub functions     */
+
+/*
+ * Function:  sub_time
+ * Purpose:   Struct two time values, and return the difference, in microseconds
+ *
+ *         Note that the function assumes that a > b
+ * Programmer: Leon Arber, 1/27/06
+ */
+static double sub_time(struct timeval* a, struct timeval* b)
+{
+    return (((double)a->tv_sec +
+     ((double)a->tv_usec) / MICROSECOND) -
+  ((double)b->tv_sec +
+   ((double)b->tv_usec) / MICROSECOND));
+}
+
+
+/*
+ * Function:    sio_time_new
+ * Purpose:     Build us a brand, spankin', new performance time object.
+ *              The object is a black box to the user.
+ * Return:      Pointer to sio_time object
+ * Programmer:  Bill Wendling, 01. October 2001
+ * Modifications:
+ */
+sio_time *
+sio_time_new(void)
+{
+    sio_time *pt = (sio_time *)calloc(1, sizeof(struct sio_time_));
+
+    /* set global timer variable */
+    timer_g = pt;
+
+    return pt;
+}
+
+/*
+ * Function:    sio_time_destroy
+ * Purpose:     Remove the memory allocated for the sio_time object. Only
+ *              need to call on a pointer allocated with the ``sio_time_new''
+ *              function.
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 01. October 2001
+ * Modifications:
+ */
+void
+sio_time_destroy(sio_time *pt)
+{
+    HDfree(pt);
+    /* reset the global timer pointer too. */
+    timer_g = NULL;
+}
+
+
+
+/*
+ * Function:    set_time
+ * Purpose:     Set the time in a ``sio_time'' object.
+ * Return:      Pointer to the passed in ``sio_time'' object.
+ * Programmer:  Bill Wendling, 01. October 2001
+ * Modifications:
+ */
+sio_time *
+set_time(sio_time *pt, timer_type t, int start_stop)
+{
+    if (pt) {
+            if (start_stop == TSTART) {
+                HDgettimeofday(&pt->sys_timer[t], NULL);
+
+    /* When we start the timer for HDF5_FINE_WRITE_FIXED_DIMS or HDF5_FINE_READ_FIXED_DIMS
+     * we compute the time it took to only open the file */
+    if(t == HDF5_FINE_WRITE_FIXED_DIMS)
+        pt->total_time[HDF5_FILE_WRITE_OPEN] += sub_time(&(pt->sys_timer[t]), &(pt->sys_timer[HDF5_GROSS_WRITE_FIXED_DIMS]));
+    else if(t == HDF5_FINE_READ_FIXED_DIMS)
+        pt->total_time[HDF5_FILE_READ_OPEN] += sub_time(&(pt->sys_timer[t]), &(pt->sys_timer[HDF5_GROSS_READ_FIXED_DIMS]));
+
+
+            } else {
+                struct timeval sys_t;
+
+                HDgettimeofday(&sys_t, NULL);
+                pt->total_time[t] += sub_time(&sys_t, &(pt->sys_timer[t]));
+
+/*                    ((double)sys_t.tv_sec +
+                                ((double)sys_t.tv_usec) / MICROSECOND) -
+                    ((double)pt->sys_timer[t].tv_sec +
+                            ((double)pt->sys_timer[t].tv_usec) / MICROSECOND);*/
+
+    /* When we stop the timer for HDF5_GROSS_WRITE_FIXED_DIMS or HDF5_GROSS_READ_FIXED_DIMS
+     * we compute the time it took to close the file after the last read/write finished */
+    if(t == HDF5_GROSS_WRITE_FIXED_DIMS)
+        pt->total_time[HDF5_FILE_WRITE_CLOSE] += sub_time(&(pt->sys_timer[t]), &(pt->sys_timer[HDF5_FINE_WRITE_FIXED_DIMS]));
+    else if(t == HDF5_GROSS_READ_FIXED_DIMS)
+        pt->total_time[HDF5_FILE_READ_CLOSE] += sub_time(&(pt->sys_timer[t]), &(pt->sys_timer[HDF5_FINE_READ_FIXED_DIMS]));
+
+            }
+
+        if (sio_debug_level >= 4) {
+            const char *msg;
+
+            switch (t) {
+            case HDF5_FILE_OPENCLOSE:
+                msg = "File Open/Close";
+                break;
+            case HDF5_DATASET_CREATE:
+                msg = "Dataset Create";
+                break;
+            case HDF5_MPI_WRITE:
+                msg = "MPI Write";
+                break;
+            case HDF5_MPI_READ:
+                msg = "MPI Read";
+                break;
+            case HDF5_FINE_WRITE_FIXED_DIMS:
+                msg = "Fine Write";
+                break;
+            case HDF5_FINE_READ_FIXED_DIMS:
+                msg = "Fine Read";
+                break;
+            case HDF5_GROSS_WRITE_FIXED_DIMS:
+                msg = "Gross Write";
+                break;
+            case HDF5_GROSS_READ_FIXED_DIMS:
+                msg = "Gross Read";
+                break;
+            case HDF5_RAW_WRITE_FIXED_DIMS:
+                msg = "Raw Write";
+                break;
+            case HDF5_RAW_READ_FIXED_DIMS:
+                msg = "Raw Read";
+                break;
+            default:
+                msg = "Unknown Timer";
+                break;
+            }
+
+            fprintf(output, "    %s %s: %.2f\n", msg,
+                    (start_stop == TSTART ? "Start" : "Stop"),
+                    pt->total_time[t]);
+        }
+    }
+
+    return pt;
+}
+
+/*
+ * Function:    get_time
+ * Purpose:     Get the time from a ``sio_time'' object.
+ * Return:      The number of seconds as a DOUBLE.
+ * Programmer:  Bill Wendling, 01. October 2001
+ * Modifications:
+ */
+double
+get_time(sio_time *pt, timer_type t)
+{
+    return pt->total_time[t];
+}
+#ifdef STANDALONE
+#include "sio_standalone.c"
+#endif
+
diff --git a/tools/perform/sio_timer.h b/tools/perform/sio_timer.h
new file mode 100644
index 0000000..46702c3
--- /dev/null
+++ b/tools/perform/sio_timer.h
@@ -0,0 +1,78 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef SIO_TIMER__
+#define SIO_TIMER__
+
+#include "hdf5.h"
+
+#if defined(H5_TIME_WITH_SYS_TIME)
+#   include <sys/time.h>
+#   include <time.h>
+#elif defined(H5_HAVE_SYS_TIME_H)
+#   include <sys/time.h>
+#else
+#   include <time.h>
+#endif
+
+#ifdef H5_HAVE_WINSOCK2_H
+#  include <winsock2.h>
+#endif /* H5_HAVE_WINSOCK2_H */
+
+/* The different types of timers we can have */
+typedef enum timer_type_ {
+    HDF5_FILE_OPENCLOSE,
+    HDF5_DATASET_CREATE,
+    HDF5_MPI_WRITE,
+    HDF5_MPI_READ,
+    HDF5_FILE_READ_OPEN,
+    HDF5_FILE_READ_CLOSE,
+    HDF5_FILE_WRITE_OPEN,
+    HDF5_FILE_WRITE_CLOSE,
+    HDF5_FINE_WRITE_FIXED_DIMS,
+    HDF5_FINE_READ_FIXED_DIMS,
+    HDF5_GROSS_WRITE_FIXED_DIMS,
+    HDF5_GROSS_READ_FIXED_DIMS,
+    HDF5_RAW_WRITE_FIXED_DIMS,
+    HDF5_RAW_READ_FIXED_DIMS,
+    NUM_TIMERS
+} timer_type;
+
+
+/* Miscellaneous identifiers */
+enum {
+    TSTART,          /* Start a specified timer              */
+    TSTOP            /* Stop a specified timer               */
+};
+
+/* The performance time structure */
+typedef struct sio_time_ {
+    double total_time[NUM_TIMERS];
+    struct timeval sys_timer[NUM_TIMERS];
+} sio_time;
+
+/* External function declarations */
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+extern sio_time    *sio_time_new(void);
+extern void         sio_time_destroy(sio_time *pt);
+extern void         set_timer_type(sio_time *pt);
+extern sio_time    *set_time(sio_time *pt, timer_type t, int start_stop);
+extern double       get_time(sio_time *pt, timer_type t);
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
+#endif  /* SIO_TIMER__ */
diff --git a/tools/perform/zip_perf.c b/tools/perform/zip_perf.c
new file mode 100644
index 0000000..edd5b0f
--- /dev/null
+++ b/tools/perform/zip_perf.c
@@ -0,0 +1,653 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/* ===========================================================================
+ * Usage:  zip_perf [-d] [-f] [-h] [-1 to -9] [files...]
+ *   -d : decompress
+ *   -f : compress with Z_FILTERED
+ *   -h : compress with Z_HUFFMAN_ONLY
+ *   -1 to -9 : compression level
+ */
+
+/* our header files */
+#include "h5test.h"
+#include "h5tools.h"
+#include "h5tools_utils.h"
+
+#ifdef H5_HAVE_FILTER_DEFLATE
+
+#include <zlib.h>
+
+#ifdef VMS
+#  define unlink        delete
+#endif  /* VMS */
+
+#ifdef RISCOS
+#  define unlink        remove
+#  define fileno(file)  file->__file
+#endif  /* RISCOS */
+
+#define ONE_KB              1024
+#define ONE_MB              (ONE_KB * ONE_KB)
+#define ONE_GB              (ONE_MB * ONE_KB)
+
+#define MICROSECOND         1000000.0
+
+/* report 0.0 in case t is zero too */
+#define MB_PER_SEC(bytes,t) ((fabs(t)<0.0000000001) ? 0.0 : ((((double)bytes) / ONE_MB) / (t)))
+
+#ifndef TRUE
+#define TRUE    1
+#endif  /* TRUE */
+
+#ifndef FALSE
+#define FALSE   (!TRUE)
+#endif  /* FALSE */
+
+#ifndef S_IRWXU
+#define S_IRWXU (_S_IREAD|_S_IWRITE)
+#endif
+
+/* internal variables */
+static const char *prog=NULL;
+static const char *option_prefix=NULL;
+static char *filename=NULL;
+static int compress_percent = 0;
+static int compress_level = Z_DEFAULT_COMPRESSION;
+static int output, random_test = FALSE;
+static int report_once_flag;
+static double compression_time;
+
+/* internal functions */
+static void error(const char *fmt, ...);
+static void compress_buffer(Bytef *dest, uLongf *destLen, const Bytef *source,
+                            uLong sourceLen);
+
+/* commandline options : long and short form */
+static const char *s_opts = "hB:b:c:p:rs:0123456789";
+static struct long_options l_opts[] = {
+    { "help", no_arg, 'h' },
+    { "compressability", require_arg, 'c' },
+    { "compressabilit", require_arg, 'c' },
+    { "compressabili", require_arg, 'c' },
+    { "compressabil", require_arg, 'c' },
+    { "compressabi", require_arg, 'c' },
+    { "compressab", require_arg, 'c' },
+    { "compressa", require_arg, 'c' },
+    { "compress", require_arg, 'c' },
+    { "compres", require_arg, 'c' },
+    { "compre", require_arg, 'c' },
+    { "compr", require_arg, 'c' },
+    { "comp", require_arg, 'c' },
+    { "com", require_arg, 'c' },
+    { "co", require_arg, 'c' },
+    { "file-size", require_arg, 's' },
+    { "file-siz", require_arg, 's' },
+    { "file-si", require_arg, 's' },
+    { "file-s", require_arg, 's' },
+    { "file", require_arg, 's' },
+    { "fil", require_arg, 's' },
+    { "fi", require_arg, 's' },
+    { "max-buffer-size", require_arg, 'B' },
+    { "max-buffer-siz", require_arg, 'B' },
+    { "max-buffer-si", require_arg, 'B' },
+    { "max-buffer-s", require_arg, 'B' },
+    { "max-buffer", require_arg, 'B' },
+    { "max-buffe", require_arg, 'B' },
+    { "max-buff", require_arg, 'B' },
+    { "max-buf", require_arg, 'B' },
+    { "max-bu", require_arg, 'B' },
+    { "max-b", require_arg, 'B' },
+    { "max", require_arg, 'B' },
+    { "min-buffer-size", require_arg, 'b' },
+    { "min-buffer-siz", require_arg, 'b' },
+    { "min-buffer-si", require_arg, 'b' },
+    { "min-buffer-s", require_arg, 'b' },
+    { "min-buffer", require_arg, 'b' },
+    { "min-buffe", require_arg, 'b' },
+    { "min-buff", require_arg, 'b' },
+    { "min-buf", require_arg, 'b' },
+    { "min-bu", require_arg, 'b' },
+    { "min-b", require_arg, 'b' },
+    { "min", require_arg, 'b' },
+    { "prefix", require_arg, 'p' },
+    { "prefi", require_arg, 'p' },
+    { "pref", require_arg, 'p' },
+    { "pre", require_arg, 'p' },
+    { "pr", require_arg, 'p' },
+    { "random-test", no_arg, 'r' },
+    { "random-tes", no_arg, 'r' },
+    { "random-te", no_arg, 'r' },
+    { "random-t", no_arg, 'r' },
+    { "random", no_arg, 'r' },
+    { "rando", no_arg, 'r' },
+    { "rand", no_arg, 'r' },
+    { "ran", no_arg, 'r' },
+    { "ra", no_arg, 'r' },
+    { NULL, 0, '\0' }
+};
+
+/*
+ * Function:    error
+ * Purpose:     Display error message and exit.
+ * Programmer:  Bill Wendling, 05. June 2002
+ * Modifications:
+ */
+static void
+error(const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    HDfprintf(stderr, "%s: error: ", prog);
+    HDvfprintf(stderr, fmt, ap);
+    HDfprintf(stderr, "\n");
+    va_end(ap);
+    HDexit(EXIT_FAILURE);
+}
+
+/*
+ * Function:    cleanup
+ * Purpose:     Cleanup the output file.
+ * Returns:     Nothing
+ * Programmer:  Bill Wendling, 06. June 2002
+ * Modifications:
+ */
+static void
+cleanup(void)
+{
+    if (!HDgetenv("HDF5_NOCLEANUP"))
+        HDunlink(filename);
+    HDfree(filename);
+}
+
+static void
+write_file(Bytef *source, uLongf sourceLen)
+{
+    Bytef *d_ptr, *dest;
+    uLongf d_len, destLen;
+    struct timeval timer_start, timer_stop;
+
+    /* destination buffer needs to be at least 0.1% larger than sourceLen
+     * plus 12 bytes */
+    destLen = (uLongf)((double)sourceLen + ((double)sourceLen * 0.1)) + 12;
+    dest = (Bytef *)HDmalloc(destLen);
+
+    if (!dest)
+        error("out of memory");
+
+    HDgettimeofday(&timer_start, NULL);
+    compress_buffer(dest, &destLen, source, sourceLen);
+    HDgettimeofday(&timer_stop, NULL);
+
+    compression_time += ((double)timer_stop.tv_sec +
+                            ((double)timer_stop.tv_usec) / MICROSECOND) -
+                        ((double)timer_start.tv_sec +
+                            ((double)timer_start.tv_usec) / MICROSECOND);
+
+    if (report_once_flag) {
+        HDfprintf(stdout, "\tCompression Ratio: %g\n", ((double)destLen) / (double)sourceLen);
+        report_once_flag = 0;
+    }
+
+    d_ptr = dest;
+    d_len = destLen;
+
+    /* loop to make sure we write everything out that we want to write */
+    for (;;) {
+        int rc = (int)HDwrite(output, d_ptr, (size_t)d_len);
+
+        if (rc == -1)
+            error(HDstrerror(errno));
+
+        if (rc == (int)d_len)
+            break;
+
+        d_len -= rc;
+        d_ptr += rc;
+    }
+
+    HDfree(dest);
+}
+
+/*
+ * Function:    compress_buffer
+ * Purpose:     Compress the buffer.
+ * Returns:     Z_OK            - success
+ *              Z_MEM_ERROR     - not enough memory
+ *              Z_BUF_ERROR     - not enough room in the output buffer
+ *              Z_STREAM_ERROR  - level parameter is invalid
+ * Programmer:  Bill Wendling, 05. June 2002
+ * Modifications:
+ */
+static void
+compress_buffer(Bytef *dest, uLongf *destLen, const Bytef *source,
+                uLong sourceLen)
+{
+    int rc = compress2(dest, destLen, source, sourceLen, compress_level);
+
+    if (rc != Z_OK) {
+        /* compress2 failed - cleanup and tell why */
+        cleanup();
+
+        switch (rc) {
+        case Z_MEM_ERROR:
+            error("not enough memory");
+            break;
+        case Z_BUF_ERROR:
+            error("not enough room in the output buffer");
+            break;
+        case Z_STREAM_ERROR:
+            error("level parameter (%d) is invalid", compress_level);
+            break;
+        default:
+            error("unknown compression error");
+            break;
+        }
+    }
+}
+
+#ifdef LATER
+/*
+ * Function:    uncompress_buffer
+ * Purpose:     Uncompress the buffer.
+ * Returns:     Z_OK            - success
+ *              Z_MEM_ERROR     - not enough memory
+ *              Z_BUF_ERROR     - not enough room in the output buffer
+ *              Z_DATA_ERROR    - the input data was corrupted
+ * Programmer:  Bill Wendling, 05. June 2002
+ * Modifications:
+ */
+static int
+uncompress_buffer(Bytef *dest, uLongf *destLen, const Bytef *source,
+                  uLong sourceLen)
+{
+    int rc = uncompress(dest, destLen, source, sourceLen);
+
+    return rc;
+}
+#endif /* LATER */
+
+/*
+ * Function:    get_unique_name
+ * Purpose:     Create a new file who's name doesn't conflict with
+ *              pre-existing files.
+ * Returns:     Nothing
+ * Programmer:  Bill Wendling, 06. June 2002
+ * Modifications:
+ */
+#define ZIP_PERF_FILE "zip_perf.data"
+static void
+get_unique_name(void)
+{
+    const char *prefix = NULL;
+    const char *env = HDgetenv("HDF5_PREFIX");
+
+    if (env)
+        prefix = env;
+
+    if (option_prefix)
+        prefix = option_prefix;
+
+    if (prefix)
+        /* 2 = 1 for '/' + 1 for null terminator */
+        filename = (char *) HDmalloc(HDstrlen(prefix) + HDstrlen(ZIP_PERF_FILE) + 2);
+    else
+        filename = (char *) HDmalloc(HDstrlen(ZIP_PERF_FILE) + 1);
+
+    if (!filename)
+        error("out of memory");
+
+    filename[0] = 0;
+    if (prefix){
+        HDstrcpy(filename, prefix);
+        HDstrcat(filename, "/");
+    }
+    HDstrcat(filename, ZIP_PERF_FILE);
+}
+
+/*
+ * Function:    usage
+ * Purpose:     Print a usage message and then exit.
+ * Return:      Nothing
+ * Programmer:  Bill Wendling, 05. June 2002
+ * Modifications:
+ */
+static void
+usage(void)
+{
+    HDfprintf(stdout, "usage: %s [OPTIONS]\n", prog);
+    HDfprintf(stdout, "  OPTIONS\n");
+    HDfprintf(stdout, "     -h, --help                 Print this usage message and exit\n");
+    HDfprintf(stdout, "     -1...-9                    Level of compression, from 1 to 9\n");
+    HDfprintf(stdout, "     -c P, --compressability=P  Percentage of compressability of the random\n");
+    HDfprintf(stdout, "                                data you want [default: 0]");
+    HDfprintf(stdout, "     -s S, --file-size=S        Maximum size of uncompressed file [default: 64M]\n");
+    HDfprintf(stdout, "     -B S, --max-buffer_size=S  Maximum size of buffer [default: 1M]\n");
+    HDfprintf(stdout, "     -b S, --min-buffer_size=S  Minumum size of buffer [default: 128K]\n");
+    HDfprintf(stdout, "     -p D, --prefix=D           The directory prefix to place the file\n");
+    HDfprintf(stdout, "     -r, --random-test          Use random data to write to the file\n");
+    HDfprintf(stdout, "                                [default: no]\n");
+    HDfprintf(stdout, "\n");
+    HDfprintf(stdout, "  D  - a directory which exists\n");
+    HDfprintf(stdout, "  P  - a number between 0 and 100\n");
+    HDfprintf(stdout, "  S  - is a size specifier, an integer >=0 followed by a size indicator:\n");
+    HDfprintf(stdout, "\n");
+    HDfprintf(stdout, "          K - Kilobyte (%d)\n", ONE_KB);
+    HDfprintf(stdout, "          M - Megabyte (%d)\n", ONE_MB);
+    HDfprintf(stdout, "          G - Gigabyte (%d)\n", ONE_GB);
+    HDfprintf(stdout, "\n");
+    HDfprintf(stdout, "      Example: 37M = 37 Megabytes = %d bytes\n", 37 * ONE_MB);
+    HDfprintf(stdout, "\n");
+    HDfflush(stdout);
+}
+
+/*
+ * Function:    parse_size_directive
+ * Purpose:     Parse the size directive passed on the commandline. The size
+ *              directive is an integer followed by a size indicator:
+ *
+ *                  K, k - Kilobyte
+ *                  M, m - Megabyte
+ *
+ * Return:      The size as a size_t because this is related to buffer size.
+ *              If an unknown size indicator is used, then the program will
+ *              exit with EXIT_FAILURE as the return value.
+ * Programmer:  Bill Wendling, 05. June 2002
+ * Modifications:
+ */
+static unsigned long
+parse_size_directive(const char *size)
+{
+    unsigned long s;
+    char *endptr;
+
+    s = HDstrtoul(size, &endptr, 10);
+
+    if (endptr && *endptr) {
+        while (*endptr != '\0' && (*endptr == ' ' || *endptr == '\t'))
+            ++endptr;
+
+        switch (*endptr) {
+            case 'K':
+            case 'k':
+                s *= ONE_KB;
+                break;
+            case 'M':
+            case 'm':
+                s *= ONE_MB;
+                break;
+            case 'G':
+            case 'g':
+                s *= ONE_GB;
+                break;
+            default:
+                error("illegal size specifier '%c'", *endptr);
+                break;
+        }
+    }
+
+    return s;
+}
+
+static void
+fill_with_random_data(Bytef *src, uLongf src_len)
+{
+    register unsigned u;
+    h5_stat_t stat_buf;
+
+    if (HDstat("/dev/urandom", &stat_buf) == 0) {
+        uLongf len = src_len;
+        Bytef *buf = src;
+        int fd = HDopen("/dev/urandom", O_RDONLY, 0);
+
+        HDfprintf(stdout, "Using /dev/urandom for random data\n");
+
+        if (fd < 0)
+            error(HDstrerror(errno));
+
+        for (;;) {
+            ssize_t rc = HDread(fd, buf, src_len);
+
+            if (rc == -1)
+                error(HDstrerror(errno));
+
+            if (rc == (ssize_t)len)
+                break;
+
+            buf += rc;
+            len -= rc;
+        }
+    } else {
+        HDfprintf(stdout, "Using random() for random data\n");
+
+        for (u = 0; u < src_len; ++u)
+            src[u] = (Bytef)(0xff & HDrandom());
+    }
+
+    if (compress_percent) {
+        unsigned long s = src_len * compress_percent / 100;
+
+        HDmemset(src, '\0', s);
+    }
+}
+
+static void
+do_write_test(unsigned long file_size, unsigned long min_buf_size,
+              unsigned long max_buf_size)
+{
+    uLongf src_len, total_len;
+    struct timeval timer_start, timer_stop;
+    double total_time;
+    Bytef *src;
+
+    for (src_len = min_buf_size; src_len <= max_buf_size; src_len <<= 1) {
+        register unsigned long i, iters;
+
+        iters = file_size / src_len;
+        src = (Bytef *)HDcalloc(1, sizeof(Bytef) * src_len);
+
+        if (!src) {
+            cleanup();
+            error("out of memory");
+        }
+
+        compression_time = 0.0;
+
+        if (random_test)
+            fill_with_random_data(src, src_len);
+
+        HDfprintf(stdout, "Buffer size == ");
+
+        if (src_len >= ONE_KB && (src_len % ONE_KB) == 0) {
+            if (src_len >= ONE_MB && (src_len % ONE_MB) == 0) {
+                HDfprintf(stdout, "%ldMB", src_len / ONE_MB);
+            } else {
+                HDfprintf(stdout, "%ldKB", src_len / ONE_KB);
+            }
+        } else {
+            HDfprintf(stdout, "%ld", src_len);
+        }
+
+        HDfprintf(stdout, "\n");
+
+        /* do uncompressed data write */
+        HDgettimeofday(&timer_start, NULL);
+        output = HDopen(filename, O_RDWR | O_CREAT, S_IRWXU);
+
+        if (output == -1)
+            error(HDstrerror(errno));
+
+        for (i = 0; i <= iters; ++i) {
+            Bytef *s_ptr = src;
+            uLong s_len = src_len;
+
+            /* loop to make sure we write everything out that we want to write */
+            for (;;) {
+                ssize_t rc = HDwrite(output, s_ptr, s_len);
+
+                if (rc == -1)
+                    error(HDstrerror(errno));
+
+                if (rc == (ssize_t)s_len)
+                    break;
+
+                s_len -= rc;
+                s_ptr += rc;
+            }
+        }
+
+        HDclose(output);
+        HDgettimeofday(&timer_stop, NULL);
+
+        total_time = ((double)timer_stop.tv_sec +
+                            ((double)timer_stop.tv_usec) / MICROSECOND) -
+                     ((double)timer_start.tv_sec +
+                            ((double)timer_start.tv_usec) / MICROSECOND);
+
+        HDfprintf(stdout, "\tUncompressed Write Time: %.2fs\n", total_time);
+        HDfprintf(stdout, "\tUncompressed Write Throughput: %.2fMB/s\n",
+               MB_PER_SEC(file_size, total_time));
+
+        HDunlink(filename);
+
+        /* do compressed data write */
+        output = HDopen(filename, O_RDWR | O_CREAT, S_IRWXU);
+
+        if (output == -1)
+            error(HDstrerror(errno));
+
+        report_once_flag = 1;
+        HDgettimeofday(&timer_start, NULL);
+
+        for (total_len = 0; total_len < file_size; total_len += src_len)
+            write_file(src, src_len);
+
+        HDclose(output);
+        HDgettimeofday(&timer_stop, NULL);
+
+        total_time = ((double)timer_stop.tv_sec +
+                            ((double)timer_stop.tv_usec) / MICROSECOND) -
+                     ((double)timer_start.tv_sec +
+                            ((double)timer_start.tv_usec) / MICROSECOND);
+
+        HDfprintf(stdout, "\tCompressed Write Time: %.2fs\n", total_time);
+        HDfprintf(stdout, "\tCompressed Write Throughput: %.2fMB/s\n",
+               MB_PER_SEC(file_size, total_time));
+        HDfprintf(stdout, "\tCompression Time: %gs\n", compression_time);
+
+        HDunlink(filename);
+        HDfree(src);
+    }
+}
+
+/*
+ * Function:    main
+ * Purpose:     Run the program
+ * Return:      EXIT_SUCCESS or EXIT_FAILURE
+ * Programmer:  Bill Wendling, 05. June 2002
+ * Modifications:
+ */
+int
+main(int argc, char **argv)
+{
+    unsigned long min_buf_size = 128 * ONE_KB, max_buf_size = ONE_MB;
+    unsigned long file_size = 64 * ONE_MB;
+    int opt;
+
+    prog = argv[0];
+    
+    /* Initialize h5tools lib */
+    h5tools_init();
+
+    while ((opt = get_option(argc, (const char **)argv, s_opts, l_opts)) > 0) {
+        switch ((char)opt) {
+        case '0': case '1': case '2':
+        case '3': case '4': case '5':
+        case '6': case '7': case '8':
+        case '9':
+            compress_level = opt - '0';
+            break;
+        case 'B':
+            max_buf_size = parse_size_directive(opt_arg);
+            break;
+        case 'b':
+            min_buf_size = parse_size_directive(opt_arg);
+            break;
+        case 'c':
+            compress_percent = (int)HDstrtol(opt_arg, NULL, 10);
+
+            if (compress_percent < 0)
+                compress_percent = 0;
+            else if (compress_percent > 100)
+                compress_percent = 100;
+
+            break;
+        case 'p':
+            option_prefix = opt_arg;
+            break;
+        case 'r':
+            random_test = TRUE;
+            break;
+        case 's':
+            file_size = parse_size_directive(opt_arg);
+            break;
+        case '?':
+            usage();
+            exit(EXIT_FAILURE);
+            break;
+        case 'h':
+        default:
+            usage();
+            exit(EXIT_SUCCESS);
+            break;
+        }
+    }
+
+    if (min_buf_size > max_buf_size)
+        error("minmum buffer size (%d) exceeds maximum buffer size (%d)",
+              min_buf_size, max_buf_size);
+
+    HDfprintf(stdout, "Filesize: %ld\n", file_size);
+
+    if (compress_level == Z_DEFAULT_COMPRESSION)
+        HDfprintf(stdout, "Compression Level: 6\n");
+    else
+        HDfprintf(stdout, "Compression Level: %d\n", compress_level);
+
+    get_unique_name();
+    do_write_test(file_size, min_buf_size, max_buf_size);
+    cleanup();
+    return EXIT_SUCCESS;
+}
+
+#else
+
+/*
+ * Function:    main
+ * Purpose:     Dummy main() function for if HDF5 was configured without
+ *              zlib stuff.
+ * Return:      EXIT_SUCCESS
+ * Programmer:  Bill Wendling, 10. June 2002
+ * Modifications:
+ */
+int
+main(void)
+{
+    HDfprintf(stdout, "No compression IO performance because zlib was not configured\n");
+    return EXIT_SUCCESS;
+}
+
+#endif  /* !H5_HAVE_FILTER_DEFLATE */