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openmpi/ompi/mpi/c/reduce_scatter.c
Shiqing Fan abd21b6d17 - An update for memchecker :
1. fix a bug in pml_ob1_recvreq/sendreq.c, buffer was made defined where the request has already been released.
2. complete memchecker support for collective functions.
3. change the wrongly spelled function name of memchecker, i.e. '*_isaddressible' should be '*_isaddressable'

This commit was SVN r20043.
2008-11-27 16:34:02 +00:00

132 строки
4.3 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) 2004-2008 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/datatype/datatype.h"
#include "ompi/op/op.h"
#include "ompi/memchecker.h"
#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Reduce_scatter = PMPI_Reduce_scatter
#endif
#if OMPI_PROFILING_DEFINES
#include "ompi/mpi/c/profile/defines.h"
#endif
static const char FUNC_NAME[] = "MPI_Reduce_scatter";
int MPI_Reduce_scatter(void *sendbuf, void *recvbuf, int *recvcounts,
MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
{
int i, err, size, count;
MEMCHECKER(
int rank;
size = ompi_comm_size(comm);
rank = ompi_comm_rank(comm);
for (count = i = 0; i < size; ++i) {
if (0 == recvcounts[i]) {
++count;
}
}
memchecker_comm(comm);
memchecker_datatype(datatype);
/* check receive buffer of current proccess, whether it's addressable. */
memchecker_call(&opal_memchecker_base_isaddressable, recvbuf,
recvcounts[rank], datatype);
/* check whether the actual send buffer is defined. */
if(MPI_IN_PLACE == sendbuf) {
memchecker_call(&opal_memchecker_base_isdefined, recvbuf, count, datatype);
} else {
memchecker_call(&opal_memchecker_base_isdefined, sendbuf, count, datatype);
}
);
if (MPI_PARAM_CHECK) {
char *msg;
err = MPI_SUCCESS;
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if (ompi_comm_invalid(comm)) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM,
FUNC_NAME);
}
/* Unrooted operation; same checks for all ranks on both
intracommunicators and intercommunicators */
else if (MPI_OP_NULL == op || NULL == op) {
err = MPI_ERR_OP;
} else if (!ompi_op_is_valid(op, datatype, &msg, FUNC_NAME)) {
int ret = OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_OP, msg);
free(msg);
return ret;
} else if (NULL == recvcounts) {
err = MPI_ERR_COUNT;
} else if (MPI_IN_PLACE == recvbuf) {
err = MPI_ERR_ARG;
}
OMPI_ERRHANDLER_CHECK(err, comm, err, FUNC_NAME);
/* We always define the remote group to be the same as the
local group in the case of an intracommunicator, so it's
safe to get the size of the remote group here for both
intra- and intercommunicators */
size = ompi_comm_size(comm);
for (i = 0; i < size; ++i) {
OMPI_CHECK_DATATYPE_FOR_SEND(err, datatype, recvcounts[i]);
OMPI_ERRHANDLER_CHECK(err, comm, err, FUNC_NAME);
}
}
/* MPI-1, p114, says that each process must supply at least one
element. But at least the Pallas benchmarks call MPI_REDUCE
with a count of 0. So be sure to handle it. Grrr... */
size = ompi_comm_size(comm);
for (count = i = 0; i < size; ++i) {
if (0 == recvcounts[i]) {
++count;
}
}
if (size == count) {
return MPI_SUCCESS;
}
OPAL_CR_ENTER_LIBRARY();
/* Invoke the coll component to perform the back-end operation */
OBJ_RETAIN(op);
err = comm->c_coll.coll_reduce_scatter(sendbuf, recvbuf, recvcounts,
datatype, op, comm,
comm->c_coll.coll_reduce_scatter_module);
OBJ_RELEASE(op);
OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
}