summaryrefslogtreecommitdiffstats
path: root/testpar
Commit message (Collapse)AuthorAgeFilesLines
* [svn-r12584] Mentioned VFD in test output to make it easier to tell which ↵James Laird2006-08-171-7/+6
| | | | | | | | | VFD is being used when a test is run. Running reconfigure also regenerated error header files (because someone edited them manually?).
* [svn-r12554] New tests have been added to test the correctness of ↵MuQun Yang2006-08-096-87/+206
| | | | | | | | independent IO with file setview. To activite this test, add the command option -i. For example, at IBM AIX, type "poe testphdf5 -i" will test the library with independent IO with file setview. It simply replaces all the collective IO tests with independent IO with file setview.
* [svn-r12519] Fixed "make check-vfd"James Laird2006-07-311-2/+3
| | | | | | | | | | "make check-vfd" will now run all tests in the test directory with different file drivers (at least, all of those tests that use the testing framework's FAPL). Tests that fail will be skipped. This is not a perfect fix, but is better than nothing. Along with this change, check-vfd should be added to the Daily Tests.
* [svn-r12462] Committed a variety of metadata cache related changes:John Mainzer2006-07-131-23/+738
| | | | | | | | | | | | | | | | | | | | | | 1) Added trace file support to the metadata cache. This allows capture of all metadata cache calls in trace files for purposes of optimization and debuging. 2) Added an expunge entry function. This allows an entry to be deleteded from the cache without writing it to disk even if it is dirty. 3) Added a function call to resize pinned entries. 4) Added code to deal with entries that are dirty on load. This is needed in support of a bug fix which can alter object headers on load to repair files. 5) Added progress reporting code to the "MDC API smoke check" test in cache_api.c. To enable the progress reporting, set report_progress to TRUE in mdc_api_call_smoke_check(). Tested with h5committest, and a parallel test on phoenix (dual athelon linux box).
* [svn-r12440] Purpose:Quincey Koziol2006-06-277-432/+432
| | | | | | | | | | | Code cleanup Description: Trim trailing whitespace in Makefile.am and C/C++ source files to make diffing changes easier. Platforms tested: None necessary, whitespace only change
* [svn-r12431] Purpose:James Laird2006-06-212-17/+7
| | | | | | | | | | | | | | Configuration feature Description: 'make install' now tests both static and shared libraries if both are installed. Solution: Previously, shared libraries were only tested when static libraries were not installed. Also cleaned up line in commence.am that was including HL library in all Makefiles. Platforms tested: mir (Makefile change only)
* [svn-r12411] Purpose:James Laird2006-06-131-0/+1
| | | | | | | | | | | | | | Bug fix - bugzilla #552 Description: On Cray X1, trying to use : as an argument confused the system. Solution: Added a test in configure to see if : as an argument is bad. If so, skipped the test. Platforms tested: mir, Cray X1 (change to configure only)
* [svn-r12407] Purpose:Albert Cheng2006-06-061-3/+3
| | | | | | | | | | slight cleanup. Description: Changed the name of write type from write to write_pattern. Platforms tested: h5committested.
* [svn-r12405] Purpose:Albert Cheng2006-06-061-86/+38
| | | | | | | | | | | | | | Bug fix. Description: It failed when only 1 is used to test. Solution: Cleanup the code a little so that it works for any number of processes to invoke it. Platforms tested: h5committested,
* [svn-r12401] Purpose:MuQun Yang2006-06-031-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Some collective chunk IO macro names are confusing, change them to more meaningful names. Description: H5Pset_dxpl_mpio_chunk_opt will set a flag so that the library can do one linked IO or mul ti-chunk IO with collective in chunking storage directly. That is, the library won't do an alyses to determine this. The flags for the enum type we used before are: H5FD_MPIO_OPT_ONE_IO H5FD_MPIO_OPT_MULTI_IO They are not good names because of the following two reasons: 1. It doesn't reflect chunking storage 2. OPT is kind of redundant and misleading, Solution: We change the names to H5FD_MPIO_CHUNK_ONE_IO H5FD_MPIO_CHUNK_MULTI_IO Platforms tested: Since only macro names are changed, no need to test with h5committest. Misc. update:
* [svn-r12396] Purpose:Albert Cheng2006-06-012-3/+4
| | | | | | | | | | | | | | Bug fix. Description: Sometimes the parallel prefix is given in the form of nfs:/mnt/pfs which if given to a non-MPIO VFD like the default H5Fcreate, it would fail. Called h5_rmprefix which would return the non-prefix component part of the file name which would be okay for the default H5Fcreate and such. Platforms tested: Tested in heping parallel.
* [svn-r12380] Purpose:Albert Cheng2006-05-261-43/+400
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Feature (Code and tests are done by Christian. I just committed the code.) Description: Rewrote the purpose of this test. Now it tests these three cases, /* * Test following possible scenarios, * Case 1: * Sequential create a file and dataset with H5D_ALLOC_TIME_EARLY and large * size, no write, close, reopen in parallel, read to verify all return * the fill value. * Case 2: * Sequential create a file and dataset with H5D_ALLOC_TIME_EARLY but small * size, no write, close, reopen in parallel, extend to large size, then close, * then reopen in parallel and read to verify all return the fill value. * Case 3: * Sequential create a file and dataset with H5D_ALLOC_TIME_EARLY and large * size, write just a small part of the dataset (second to the last), close, * then reopen in parallel, read to verify all return the fill value except * those small portion that has been written. Without closing it, writes * all parts of the dataset in a interleave pattern, close it, and reopen * it, read to verify all data are as written. */ Platforms tested: Tested in copper, tg-ncsa and heping, all in parallel mode.
* [svn-r12374] Purpose:John Mainzer2006-05-241-50/+706
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1) Check in potential fix to unreproduceable bug in t_cache observed on Cobalt 2) Check in code supporting added pinned entry features in the metadata cache. Description: 1) Elena encountered a bug in t_cache when running on Cobalt. On investigation I found a potential race condition in t_cache that could explain her observation. 2) Quincey requested additions to the metadata cache allowing renaming of pinned entryies, and marking of pinned or protected entries as dirty. Solution: 1) Modified t_cache.c to prevent the potential race condition. Elena was unable to reproduce the bug on Cobalt, so we don't know if my fix actually addressed the problem. 2) Added code supporting the requested functions. The changes were relatively trivial, but required substantial new test code. Platforms tested: h5committest, serial test on heping, parallel test on phoenix. Misc. update:
* [svn-r12358] Purpose:Albert Cheng2006-05-191-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Bug fix. Description: The ${TR}, though avoid the error, is inconvenient. It is needed because configure.in use the char range in the style of 'a-z'. The other style of '[a-z]' is more commonly accepted by all tr but autoconf tends to strip away [], making the syntax rather clumsy. Solution: Learned from autoconf that it avoids the use of character range by just spell all the letters out. Changed our tr commands to use those variables defined by autoconf. Also removed the definition of ${TR} since it will cause inconsistancy when autoconf also use plain 'tr' in its generated code. The Makefile.in are changed because the elimination of ${TR} from configure triggered its removal from all Makefil.in. That is okay because ${TR} is not used at all in Makefile. Platforms tested: h5committested. (sol failed to connected). also tested in shanti using both /usr/ucb/tr and /bin/tr (the bad one before.) Misc. update: Updated both INSTALL and RELEASE files.
* [svn-r12321] Purpose:John Mainzer2006-05-021-16/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Bug fix Description: Fix two test bugs: 1) Unitialized variable bug in test of H5C_get_entry_status() (in test/cache.c) 2) Incorrect initialization of constant in t_cache when running with MPE. (in testpar/t_cache.c) Solution: 1) Don't test uninitialize variable. 2) Correct initialzation of constant in MPE case. Platforms tested: Tested on Heping and Copper. Misc. update:
* [svn-r12316] Purpose:Quincey Koziol2006-04-291-12/+14
| | | | | | | | | | | | | | | Code cleanup/feature twist Description: Adjust recent H5AC routines to take H5F_t pointers instead of H5C_t pointers, to match the rest of the H5AC routines. This change propagated into a few of the tests, which also had some compiler warnings cleaned up... Platforms tested: FreeBSD 4.11 (sleipnir) w/parallel Linux 2.4/64 (mir) w/C++ & FORTRAN
* [svn-r12311] Purpose:John Mainzer2006-04-281-132/+1046
| | | | | | | | | | | | | | | | | | | | | | | | | Add pinned entry capability to cache. Description: For frequently accessed cache entries, the protect/unprotect overhead is sometimes a bottleneck. Solution: Allow entries to be pinned in the cache. Pinned entries can't be evicted, but can be flushed or modified. Platforms tested: h5committested -- minus one small typo in test/cache.c whose fix was tested on copper and heping only. Misc. update:
* [svn-r12295] Purpose:James Laird2006-04-211-3/+3
| | | | | | | | | | | | | | | | | | | Several bug fixes Description: Added config file for Cray X1 (previous file was misnamed) Simplified some code in hyperslab.c test that seemed to have been confusing compiler on Cray X1. Fixed typo in config/commence.am Cleaned up hl/src/Makefile.am Solution: All four fixes should be straightforward. The failure on Cray was very difficult to debug, but involved arithmetic errors. This change seems to fix it. Platforms tested: heping, copper, sol, some Cray X1 (more testing when system comes back up)
* [svn-r12292] Purpose:Quincey Koziol2006-04-203-1049/+6
| | | | | | | | | | | | | Code maintenance Description: Remove flexible parallel code Platforms tested: FreeBSD 4.11 (sleipnir) Linux 2.4 (heping) Solaris 2.9 (shanti) Linux 2.4/64 (mir)
* [svn-r12229] Purpose:Pedro Vicente Nunes2006-04-122-2/+5
| | | | | | | | | | | | | | | | | | | | | new feature Description: 1) separated the HL library into "public" and "private" header files, with the same caracteristics as the basic library 2) added the public headers to hdf5.h (with a conditional include macro, defined in configure.in) 3) added the path to HL in all Makefile.am 's , because of the inclusion in hdf5.h Solution: Platforms tested: linux 32, 64 AIX solaris with fortran and c++ (one packet table example fails) Misc. update:
* [svn-r12227] Purpose:Albert Cheng2006-04-121-5/+5
| | | | | | | | | | | | | | | | | bug fix. Description: The MPE_Stop_log did not work in copper. It spewed out MPE errors and ended in infinite looping. Solution: Changed to a smaller test size to avoid generating huge MPE log files when MPE is configured in. Platforms tested: Copper (mpe) Misc. update:
* [svn-r12224] Purpose:Albert Cheng2006-04-111-0/+5
| | | | | | | | | | | | | | | | Bug fix. Description: When MPE is used, the test generates huge Clog files in /tmp that could fill up the disk (like in Copper.) Solution: Turned off MPE logging. Platforms tested: heping (pp) and copper(pp) Misc. update:
* [svn-r12174] Purpose:MuQun Yang2006-03-293-9/+484
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Adding parallel tests for optional collective chunk APIs Description: Three new APIs "H5Pset_dxpl_mpio_chunk_opt_ratio H5Pset_dxpl_mpio_chunk_opt_num H5Pset_dxpl_mpio_chunk_opt" for optional optimization choices from users have been added to the libraries. This check-in adds six tests to verify the funcationality and correctedness of these APIs. These tests need to be verified with 3 or more processors and with MPI-IO driver only. Solution: Using H5Pinsert, H5Pget, H5Pset to verify that the library indeed goes into the branch we hope for. Using H5_HAVE_INSTRUMENT macro to isolate these changes so that it won't affect or be misused by the application. Platforms tested: h5committest(shanti still refused to be connected) Parallel tests on heping somehow are skipped. Manually testing at heping. Have checked 1,2,3,4,5 processes. Misc. update:
* [svn-r12149] Purpose:James Laird2006-03-231-7/+1
| | | | | | | | | | | | | | | | Bug fix Description: Previous checkin did a bad thing; 'make clean' failed in example directories. Solution: Fixed commence.am so that examples no longer break, and fixed a mistake in conclude.am. Platforms tested: heping (minor makefile change) Misc. update:
* [svn-r12148] Purpose:MuQun Yang2006-03-232-1/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | Add tests for optional APIs to support collective chunk IO Description: In order to test whether library picks up the user's options, The number of chunks need to be varied for different processes, Selection of the number of processes selected in one chunk also need to be varied. Solution: Create two cases, 1. Each chunk only selected by one unique process, this case library should use independent for collective call. 2. One-third of the processes occupies the top half of the whole domain, The rest of the processes occupies the lower half of the domain. The total number of chunk is a fixed number 8. Platforms tested: Linux 2.4 with mpich 1.2.6(only) Since I only checked in the code that handles the selection, haven't added any new tests yet. So it won't affect any platforms. Misc. update:
* [svn-r12143] Purpose:James Laird2006-03-231-0/+4
| | | | | | | | | | | | | | Bug fix Description: make check-clean didn't clean results of example tests Solution: Fixed Makefiles so that check-clean recurses into example directories. Also a little Makefile cleanup. Platforms tested: mir, modi4, heping, copper
* [svn-r12142] Purpose:MuQun Yang2006-03-233-69/+104
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | change the array size of collective chunking features of parallel tests. Description: Previously array size for collective optimization tests including cchunk1, cchunk2, cchunk3, cchunk4, ccontw, ccontr, cschunkw, cschunkr, ccchunkw, ccchunkr are fixed, They are only valid for some good number of processors(1,2,3,4,6,8,12,16,24,32,48 etc). Recently there are more requests for parallel tests to be valid on some odd number of processes such as 5,7,11,13 etc. Solution: I change the array size to be dynamic rather than static. Now the fastest change array size is a function of mpi_size. dim2 = constant *mpi_size. After some tunings, theoretically the above tests should be valid for any number of processors. However, other parallel tests still need to be tuned. To verify the correctness of these tests, using mpirun -np 5 ./testphdf5 -b cchunk1 at heping. Platforms tested: h5committest(shanti is refused to be connected) at heping, 5 and 7 processes are used to verify the correctness. Misc. update:
* [svn-r12044] Purpose:MuQun Yang2006-03-092-26/+236
| | | | | | | | | | | | | | | Add new tests Description: Collective IO doesn't work for some platforms/mpio packages when more than one process has no contributions to IO. Solution: 1. Add a collective IO test to verify the correctness of the library when more than one process has no contributions to IO. 2. Add the similar MPI-IO test in t_mpi to help us maintain in more platforms. Platforms tested: heping, mir, copper Misc. update:
* [svn-r11992] Purpose:Albert Cheng2006-03-012-5/+4
| | | | | | | | | | | | Improvement. Description: The t_cache takes a long long time to run and it tests HDF5 calls. Move it to the back and let more basic tests to run first so that basic features are tested first. Platforms tested: Tested in heping with pp.
* [svn-r11953] Purpose:MuQun Yang2006-02-171-2/+0
| | | | | | | | | | | | | | code cleanup Description: remove two printf lines accidently added for debugging at NCSA cobalt. Solution: Platforms tested: No need to test. Misc. update:
* [svn-r11951] Purpose:MuQun Yang2006-02-163-4/+71
| | | | | | | | | | | | | | | | Enhance collective chunk IO supports Description: Add a new test to check the correctness of the HDF5 library behavior for collective IO mode when one process doesn't have any contribution for IO. Solution: Platforms tested: IBM AIX 5.2(copper) Linux (heping) mpich-1.2.6 Misc. update:
* [svn-r11915] Purpose:John Mainzer2006-01-311-7/+19
| | | | | | | | | | | | | | | | | | | Attempt to ensure that the parallel cache test runs at a reasonable speed with large numbers of processors. Description: In some cases, the number of random locks and unlocks was a multiple of the MPI rank. Solution: Use rank % 4 instead of simply rank. Platforms tested: copper Misc. update:
* [svn-r11904] Purpose:John Mainzer2006-01-291-0/+3487
| | | | | | | | | | | | | | | | | | | | | Add a file that I forgot in my last checkin. Description: t_cache.c is the source file for the new parallel metadata cache test. Solution: See above. Platforms tested: h5committested before the last checkin. Will run another h5committest shortly, but it shouldn't be necessary as there are no new changes. Misc. update:
* [svn-r11897] Purpose:John Mainzer2006-01-272-9/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 1) Add parallel test for metadata cache 2) Split serial test for metadata cache into two parts 3) Fix bug in which cache was flushed needlessly when the cache wasn't full. 4) Performance improvements 5) Update API for parallel cache coherency bug fix. Description: See above. Solution: See above. Platforms tested: h5committest Misc. update:
* [svn-r11866] Purpose:Albert Cheng2006-01-061-6/+2
| | | | | | | | | | | | | | | | | | | | bug fix 504 Description: testpar/t_mpi would hang if $HDF5_NOCLEANUP is set. E.g., % env HDF5_NOCLEANUP=yes mpirun -np 3 ./t_mpi This happened because the environment variables are not exported to all mpi processes by the mpirun command. So, some attempted to do cleanup while others don't and some hang waiting for others to act. Solution: Instead individual program checking getenv, they all just called h5_cleanup no matter. h5_cleanup now uses getenv_all to check the $HDF5_NOCLEANUP if it is in parallel mode. Platforms tested: h5committested, tested pp in heping too.
* [svn-r11798] Purpose:Albert Cheng2005-12-161-0/+17
| | | | | | | | | | | Feature. Description: Modified it so that it can be compiled outside of HDF5 library as a standalone program. e.g., mpicc -DSTANDALONE prog.c. Platforms tested: Tested in Red storm and heping.
* [svn-r11788] Purpose:Albert Cheng2005-12-121-2/+5
| | | | | | | | | | | | | | | | | | Patch. Description: Copper would fail with a message of 0032-113 Out of memory in routine unknown, task 0 when run with 3 processes and size 1MB in MPI-IO tests. It seems to be a copper MPIO error. Solution: Reduced the upper bound of default write size to 1/2MB (but tests only go to 1/4MB) for now, pending permenant fix from Copper. Platforms tested: Copper.
* [svn-r11786] Purpose:Leon Arber2005-12-111-18/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Minor bug fixes. Description: 1. Changed free() calls to HDfree() 2. Corrected behavior of -m command-line parameter 3. Changed return value to always return 0. Solution: 2. The -m flag tells the test to run only the MPI IO tests. However, it would incorrectly make the test run both the MPI and POSIX tests (same as the default behavior). 3. This test is known to fail on many platforms, and, even on those platforms where it usually passes, it is known to suffer transient failures (especially with small test file sizes). It's outcome is also very dependent on the filesystem on which the testfile is created. Corrected the program to always return success, so that it doesn't interfere with the daily tests. The motivation for this is that this test has nothing to do with the HDF library and is an auxiliary test. Failures in t_posix_complaint do not necessarily mean that parallel HDF will fail, but simply indicate something to look into, especially on new platforms. This is now an "output only" test, and any errors will be only be visible in the output. Platforms tested: copper (all of these were minor changes) Misc. update:
* [svn-r11783] Purpose:Albert Cheng2005-12-111-16/+32
| | | | | | | | | | | | | | | | bug fix. Description: Fixed the segmentation fault errors in modi4, copper and tg-login. It was due to the misuse of trying to realloc a pointer returned by getenv_all. (not supposed to.) Also rearranged the code so that option is checked first, then check with environment variable, then use default setup. This saves the need to do realloc at all. Platforms tested: Heping, modi4, shanti, copper (copper showed a different error now.)
* [svn-r11778] Purpose:Leon Arber2005-12-081-7/+9
| | | | | | | | | | | | | | | | | Bug fix. Description: For some strange reason, getopt() does not appear to be defined in unistd.h on colonelk when the source is compiled with -D_POSIX_SOURCE. Solution: Inserted some extern's for the missing variables to make the compiler happy. Platforms tested: colonelk, copper Misc. update:
* [svn-r11777] Purpose:Leon Arber2005-12-081-6/+23
| | | | | | | | | | | | | | | | | | | | Feature Description: Added blurb about future todo's for this test. Added support for HDF5_PARAPREFIX to determine the directory where the test file is stored. Solution: Used getenv_all to get the value of HDF5_PARAPREFIX. Note that, if a command-line parameter is passed to the program to specify a path, it will override the value of HDF5_PARAPREFIX. Platforms tested: copper, colonelk Misc. update:
* [svn-r11776] Purpose:Leon Arber2005-12-083-35/+41
| | | | | | | | | | | | | | Added t_posix_compliant to the rest of the build and patched up minor compile bugs/warnings encountered on other platforms. Description: It seems that <getopt.h> needs to be included to get the file to build, even though the man page seems to indicate that <unistd.h> should be sufficient. Solution: Platforms tested: copper, colonelk, sol
* [svn-r11772] Purpose:Leon Arber2005-12-081-0/+847
| | | | | | | | | | | | | | | | | | | Feature Description: Added posix compliance tests. Solution: These tests do increasingly complicated sets of writes followed by reads. POSIX standards say that any read that can be proven to occur after a write must include the data in that write. These tests attempt to verify whether the underlying filesystem and i/o layer provide such guarantees. Platforms tested: copper, colonelk, red storm Misc. update:
* [svn-r11741] Purpose:James Laird2005-11-181-6/+16
| | | | | | | | | | | | | | | | | Bug fix Description: Fortran type generation was broken in two ways. Fixed both. Solution: Firstly, there were a couple of path problems. Fixed a typo and specified the full path of a file. Secondly, the dependencies weren't right when building with HDF5-specific commands (make lib, make check-s, etc.). Tweaked dependencies to fix the problem. Platforms tested: mir, modi4, sleipnir
* [svn-r11738] Purpose:James Laird2005-11-181-0/+4
| | | | | | | | | | | | | | | | | | | Configure feature Description: Added 'make trace' target. Solution: Added tracing to 1.7. This was done automatically in 1.6, but left out of 1.7 until now (oops!). Tracing in 1.7 only happens manually, when the user types 'make trace.' Tracing automatically requires more framework than it's worth. I also fixed a couple of tracing bugs and ran trace. Platforms tested: mir, sleipnir, modi4 Misc. update:
* [svn-r11737] Purpose:James Laird2005-11-171-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | Bug fix Description: Before this checkin, 'gmake check-s' would fail if there was a file in the current directory named 'check-s'. This is fixed under gmake (not sure how to fix for other makes). Solution: check, progs, install, etc. are what gmake calls "phony" targets, which means that no file should be created. These targets can be specified by a line of the form .PHONY: check progs install ... Automake adds this line for targets it knows about, but HDF5 has a lot of custom rules. This checkin adds a .PHONY line for those rules. I believe that only gmake recognizes the .PHONY line (at least, pmake doesn't seem to), but a partial solution is better than none. This error should occur very rarely anyway (the user has to manually create files with names like 'build-check-s' or '_test'). Platforms tested: mir, sleipnir, modi4
* [svn-r11646] Purpose:James Laird2005-10-311-4/+14
| | | | | | | | | | | | | | | | | | Bug fix/feature Description: Added support for -shlib in h5fc and h5c++. Made check-install use -shlib when only shared libraries have been installed. Solution: h5fc and h5c++ didn't recognize -shlib. Stole code from h5cc to link against shared libraries. When static libraries are disabled, the examples Makefiles will automatically use the -shlib option to link against shared libraries. Thus, --disable-static and make check-install should work together. Platforms tested: heping(disable-static, enable-static, fortran, c++), modi4 (disable-static, fortran, c++, parallel, enable-static)
* [svn-r11612] Purpose:James Laird2005-10-271-1/+1
| | | | | | | | | | | | | Bug fix Description: Failed parallel tests now cause make to exit with an error. Solution: Edited config/conclude.am to throw an error if parallel test programs fail. Platforms tested: heping, modi4
* [svn-r11602] Purpose:James Laird2005-10-241-3/+0
| | | | | | | | | | | | Bug fix Description: Removed detection of pdb from configure.in as a corollary to removal of pdb2hdf5 tool. Platforms tested: mir, modi4
* [svn-r11576] Purpose:MuQun Yang2005-10-181-152/+261
| | | | | | | | | | | | | | | | | | Adding comments and code clean-up for code that tests collective irregular selection Description: For better maintenance in the future, Add comments to list the number for (start,count,block,stride) for irregular selection for effective testing collective chunk IO feature development in the future. Solution: Platforms tested: Linux 2.4(heping), mostly comments, no need to test on other platforms. Misc. update: