mirror of
https://github.com/HDFGroup/hdf5.git
synced 2024-11-27 02:10:55 +08:00
74a448d084
Bug fix
Description:
Relax restrictions on parallel I/O to allow compressed, chunked datasets
to be read in parallel (collective access will be degraded to independent
access, but will retrieve the information still).
Platforms tested:
FreeBSD 4.10 (sleipnir) w/parallel
Solaris 2.7 (arabica)
IRIX64 6.5 (modi4)
h5committest
96 lines
3.3 KiB
C
96 lines
3.3 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by the Board of Trustees of the University of Illinois. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the files COPYING and Copyright.html. COPYING can be found at the root *
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* of the source code distribution tree; Copyright.html can be found at the *
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* root level of an installed copy of the electronic HDF5 document set and *
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* is linked from the top-level documents page. It can also be found at *
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* http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
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* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/*
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* Parallel tests for file operations
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*/
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#include "testphdf5.h"
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/*
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* test file access by communicator besides COMM_WORLD.
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* Split COMM_WORLD into two, one (even_comm) contains the original
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* processes of even ranks. The other (odd_comm) contains the original
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* processes of odd ranks. Processes in even_comm creates a file, then
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* cloose it, using even_comm. Processes in old_comm just do a barrier
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* using odd_comm. Then they all do a barrier using COMM_WORLD.
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* If the file creation and cloose does not do correct collective action
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* according to the communicator argument, the processes will freeze up
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* sooner or later due to barrier mixed up.
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*/
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void
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test_split_comm_access(void)
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{
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int mpi_size, mpi_rank;
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MPI_Comm comm;
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MPI_Info info = MPI_INFO_NULL;
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int color, mrc;
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int newrank, newprocs;
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hid_t fid; /* file IDs */
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hid_t acc_tpl; /* File access properties */
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hbool_t use_gpfs = FALSE; /* Use GPFS hints */
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herr_t ret; /* generic return value */
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char *filename;
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filename = (char *) GetTestParameters();
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if (VERBOSE_MED)
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printf("Split Communicator access test on file %s\n",
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filename);
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/* set up MPI parameters */
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MPI_Comm_size(MPI_COMM_WORLD,&mpi_size);
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MPI_Comm_rank(MPI_COMM_WORLD,&mpi_rank);
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color = mpi_rank%2;
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mrc = MPI_Comm_split (MPI_COMM_WORLD, color, mpi_rank, &comm);
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VRFY((mrc==MPI_SUCCESS), "");
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MPI_Comm_size(comm,&newprocs);
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MPI_Comm_rank(comm,&newrank);
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if (color){
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/* odd-rank processes */
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mrc = MPI_Barrier(comm);
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VRFY((mrc==MPI_SUCCESS), "");
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}else{
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/* even-rank processes */
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int sub_mpi_rank; /* rank in the sub-comm */
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MPI_Comm_rank(comm,&sub_mpi_rank);
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/* setup file access template */
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acc_tpl = create_faccess_plist(comm, info, facc_type, use_gpfs);
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VRFY((acc_tpl >= 0), "");
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/* create the file collectively */
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fid=H5Fcreate(filename,H5F_ACC_TRUNC,H5P_DEFAULT,acc_tpl);
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VRFY((fid >= 0), "H5Fcreate succeeded");
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/* Release file-access template */
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ret=H5Pclose(acc_tpl);
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VRFY((ret >= 0), "");
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/* close the file */
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ret=H5Fclose(fid);
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VRFY((ret >= 0), "");
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/* detele the test file */
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if (sub_mpi_rank == 0){
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mrc = MPI_File_delete(filename, info);
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/*VRFY((mrc==MPI_SUCCESS), ""); */
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}
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}
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mrc = MPI_Barrier(MPI_COMM_WORLD);
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VRFY((mrc==MPI_SUCCESS), "final MPI_Barrier succeeded");
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}
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