summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorMuQun Yang <ymuqun@hdfgroup.org>2005-03-23 18:38:35 (GMT)
committerMuQun Yang <ymuqun@hdfgroup.org>2005-03-23 18:38:35 (GMT)
commit9027e26be96e6e8eb6185572b236eebf2a0c3546 (patch)
tree48ebe7c3ccd23dc61e497c183c9e945650bfa4ac
parent9c3a2e71497ed775ace5527be58aaae11b44ea03 (diff)
downloadhdf5-9027e26be96e6e8eb6185572b236eebf2a0c3546.zip
hdf5-9027e26be96e6e8eb6185572b236eebf2a0c3546.tar.gz
hdf5-9027e26be96e6e8eb6185572b236eebf2a0c3546.tar.bz2
[svn-r10390] Purpose:
Add detailed comments for MPI derived data type test. Description: Solution: Platforms tested: heping(Only comments and printf messages were added, no need to test on all platforms.) Misc. update:
-rw-r--r--testpar/t_mpi.c64
1 files changed, 60 insertions, 4 deletions
diff --git a/testpar/t_mpi.c b/testpar/t_mpi.c
index a5a3f13..97bac9c 100644
--- a/testpar/t_mpi.c
+++ b/testpar/t_mpi.c
@@ -591,6 +591,59 @@ if (special_request & USEFSYNC){
return nerrs;
}
+/*
+
+Function: test_mpio_derived_dtype
+
+Test Whether the Displacement of MPI derived datatype
+(+ File_set_view + MPI_write)works or not on this MPI-IO package
+and this platform.
+
+1. Details for the test:
+1) Create two derived datatypes with MPI_Type_hindexed:
+ datatype1:
+ count = 1, blocklens = 1, offsets = 0,
+ base type = MPI_BYTE(essentially a char)
+ datatype2:
+ count = 1, blocklens = 1, offsets = 1(byte),
+ base type = MPI_BYTE
+
+2) Using these two derived datatypes,
+ Build another derived datatype with MPI_Type_struct:
+ advtype: derived from datatype1 and datatype2
+ advtype:
+ count = 2, blocklens[0] = 1, blocklens[1]=1,
+ offsets[0] = 0, offsets[1] = 1(byte),
+ bas_type[0]=datatype1,
+ bas_type[1] = datatype2;
+
+3) Setting MPI file view with advtype
+4) Writing 2 bytes 1 to 2 using MPI_File_write to a file
+5) File content:
+Supposed the file value of the file is 0(most machines indeed do so)
+and Fill value is embraced with "() in the following output:
+Expected output should be:
+1,0,2
+
+
+
+However, at some platforms, for example, IBM AIX(at March 23rd, 2005):
+the following values were obtained:
+1,2,0
+
+The problem is that the displacement of the second derived datatype(datatype2) which formed the final derived datatype(advtype)
+ has been put after the basic datatype(MPI_BYTE) of datatype2. This is a bug.
+
+
+2. This test will verify whether the complicated derived datatype is working on
+the current platform.
+
+If this bug has been fixed in the previous not-working package, this test will issue a printf message to tell the developer to change
+the configuration specific file of HDF5 so that we can change our configurationsetting to support collective IO for irregular selections.
+
+If it turns out that the previous working MPI-IO package no longer works, this test will also issue a message to inform the corresponding failure so that
+we can turn off collective IO support for irregular selections.
+*/
static int test_mpio_derived_dtype(char *filename) {
@@ -614,7 +667,6 @@ static int test_mpio_derived_dtype(char *filename) {
char buf[2],outbuf[2];
-
MPI_Comm_size(MPI_COMM_WORLD, &mpi_size);
MPI_Comm_rank(MPI_COMM_WORLD, &mpi_rank);
ret = 0;
@@ -871,7 +923,9 @@ main(int argc, char **argv)
if(mpi_rank == 0) {
printf("Complicated derived datatype is NOT working at this platform\n");
printf("Go back to hdf5/config and find the corresponding\n");
- printf("configure-specific file and change ?????\n");
+ printf("configure-specific file (for example, powerpc-ibm-aix5.x) and add\n");
+ printf("hdf5_mpi_complex_derived_datatype_works=${hdf5_mpi_complex_derived_datatype-works='no'}\n");
+ printf(" at the end of the file.\n");
printf(" Please report to hdfhelp@ncsa.uiuc.edu about this problem.\n");
}
ret_code = 1;
@@ -881,8 +935,10 @@ main(int argc, char **argv)
if(mpi_rank == 0) {
printf(" This is NOT an error, What it really says is\n");
printf("Complicated derived datatype is WORKING at this platform\n");
- printf(" Go back to hdf5/config and find the corresponding\n");
- printf(" configure-specific file and change ?????\n");
+ printf(" Go back to hdf5/config and find the corresponding \n");
+ printf(" configure-specific file (for example, powerpc-ibm-aix5.x) and delete the line\n");
+ printf("hdf5_mpi_complex_derived_datatype_works=${hdf5_mpi_complex_derived_datatype-works='no'}\n");
+ printf(" at the end of the file.\n");
printf("Please report to hdfhelp@ncsa.uiuc.edu about this problem.\n");
}
ret_code = 1;