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openmpi/ompi/mpi/c/group_compare.c
Josh Hursey 99144db970 Improve checkpoint/restart support by allowing a checkpoint to progress when the process is *not* in the MPI library. This involves creating a separate thread for polling for a checkpoint request. This thread is active when the MPI process is not in the MPI library, and paused when the MPI process is in the library.
Some MPI C interface files saw some spacing changes to conform to the coding standards of Open MPI.

Changed MPI C interface files to use {{{OPAL_CR_ENTER_LIBRARY()}}} and {{{OPAL_CR_EXIT_LIBRARY()}}} instead of just {{{OPAL_CR_TEST_CHECKPOINT_READY()}}}. This will allow the checkpoint/restart system more flexibility in how it is to behave.

Fixed the configure check for {{{--enable-ft-thread}}} so it has a know dependance on {{{--enable-mpi-thread}}} (and/or {{{--enable-progress-thread}}}).

Added a line for Checkpoint/Restart support to {{{ompi_info}}}.

Added some options to choose at runtime whether or not to use the checkpoint polling thread. By default, if the user asked for it to be compiled in, then it is used. But some users will want the ability to toggle its use at runtime.

There are still some places for improvement, but the feature works correctly. As always with Checkpoint/Restart, it is compiled out unless explicitly asked for at configure time. Further, if it was configured in, then it is not used unless explicitly asked for by the user at runtime.

This commit was SVN r17516.
2008-02-19 22:15:52 +00:00

123 строки
3.7 KiB
C

/*
* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2005 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2006 Cisco Systems, Inc. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <stdio.h>
#include "ompi/mpi/c/bindings.h"
#include "ompi/group/group.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/communicator/communicator.h"
#include "ompi/proc/proc.h"
#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Group_compare = PMPI_Group_compare
#endif
#if OMPI_PROFILING_DEFINES
#include "ompi/mpi/c/profile/defines.h"
#endif
static const char FUNC_NAME[] = "MPI_Group_compare";
int MPI_Group_compare(MPI_Group group1, MPI_Group group2, int *result) {
/* local variables */
int return_value, proc1, proc2, similar, identical, match ;
ompi_group_t *group1_pointer, *group2_pointer;
ompi_proc_t *proc1_pointer, *proc2_pointer;
OPAL_CR_NOOP_PROGRESS();
/* initialization */
return_value=MPI_SUCCESS;
/* check for errors */
if( MPI_PARAM_CHECK ) {
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if( ( MPI_GROUP_NULL == group1 ) || ( MPI_GROUP_NULL == group2 ) ||
(NULL == group1) || (NULL==group2) ){
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_GROUP,
FUNC_NAME);
} else if (NULL == result) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_ARG,
FUNC_NAME);
}
}
/* check for same groups */
if( group1 == group2 ) {
*result=MPI_IDENT;
return return_value;
}
/* check to see if either is MPI_GROUP_NULL or MPI_GROUP_EMPTY */
if( ( MPI_GROUP_EMPTY == group1 ) || ( MPI_GROUP_EMPTY == group2 ) ) {
*result=MPI_UNEQUAL;
return return_value;
}
/* get group pointers */
group1_pointer = (ompi_group_t *)group1;
group2_pointer = (ompi_group_t *)group2;
/* compare sizes */
if( group1_pointer->grp_proc_count != group2_pointer->grp_proc_count ) {
/* if not same size - return */
*result=MPI_UNEQUAL;
return return_value;
}
/* check for similarity */
/* loop over group1 processes */
similar=1;
identical=1;
for(proc1=0 ; proc1 < group1_pointer->grp_proc_count ; proc1++ ) {
proc1_pointer= ompi_group_peer_lookup(group1_pointer,proc1);
/* loop over group2 processes to find "match" */
match=-1;
for(proc2=0 ; proc2 < group2_pointer->grp_proc_count ; proc2++ ) {
proc2_pointer=ompi_group_peer_lookup(group2_pointer,proc2);
if( proc1_pointer == proc2_pointer ) {
if(proc1 != proc2 ) {
identical=0;
}
match=proc2;
break;
}
} /* end proc2 loop */
if( match== -1 ) {
similar=false;
break;
}
} /* end proc1 loop */
/* set comparison result */
if( identical ) {
*result=MPI_IDENT;
} else if( similar ) {
*result=MPI_SIMILAR;
} else {
*result=MPI_UNEQUAL;
}
return return_value;
}