7bdfe6557b
REDUCE_SCATTER to more thoroughly check the datatype/op combination to see if it's valid or not. If it's not, print a meaningful error message rather than "Invalid MPI_Op" indicating what specifically was wrong (therefore hopefully helping users track down where in the code the problem is, and/or telling us that there's a reduction operation combo that we don't support that we should) - The check for whether a datatype is intrinsic needed to be updated -- it's not sufficient to check that dtype->id < DT_MAX_PREDEFINED; you really need to check the PREDEFINED flag on the datatype. Thanks to George for this fix (only intrinsics have a meaningful value in dtype->id). This commit was SVN r7923.
98 строки
3.0 KiB
C
98 строки
3.0 KiB
C
/*
|
|
* Copyright (c) 2004-2005 The Trustees of Indiana University.
|
|
* All rights reserved.
|
|
* Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
|
|
* 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.
|
|
* $COPYRIGHT$
|
|
*
|
|
* Additional copyrights may follow
|
|
*
|
|
* $HEADER$
|
|
*/
|
|
#include "ompi_config.h"
|
|
#include <stdio.h>
|
|
|
|
#include "mpi/c/bindings.h"
|
|
#include "ompi/datatype/datatype.h"
|
|
#include "ompi/op/op.h"
|
|
|
|
#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
|
|
#pragma weak MPI_Reduce = PMPI_Reduce
|
|
#endif
|
|
|
|
#if OMPI_PROFILING_DEFINES
|
|
#include "mpi/c/profile/defines.h"
|
|
#endif
|
|
|
|
static const char FUNC_NAME[] = "MPI_Reduce";
|
|
|
|
|
|
int MPI_Reduce(void *sendbuf, void *recvbuf, int count,
|
|
MPI_Datatype datatype, MPI_Op op, int root, MPI_Comm comm)
|
|
{
|
|
int err;
|
|
|
|
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);
|
|
}
|
|
|
|
/* Checks for all ranks */
|
|
|
|
else if (MPI_OP_NULL == op) {
|
|
err = MPI_ERR_OP;
|
|
} else if (!ompi_op_is_valid(op, datatype, &msg, FUNC_NAME)) {
|
|
int ret = OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_OP, msg);
|
|
free(msg);
|
|
return ret;
|
|
} else if ((root != ompi_comm_rank(comm) && MPI_IN_PLACE == sendbuf) ||
|
|
MPI_IN_PLACE == recvbuf) {
|
|
err = MPI_ERR_ARG;
|
|
} else {
|
|
OMPI_CHECK_DATATYPE_FOR_SEND(err, datatype, count);
|
|
}
|
|
OMPI_ERRHANDLER_CHECK(err, comm, err, FUNC_NAME);
|
|
|
|
/* Intercommunicator errors */
|
|
|
|
if (!OMPI_COMM_IS_INTRA(comm)) {
|
|
if (! ((root >= 0 && root < ompi_comm_remote_size(comm)) ||
|
|
MPI_ROOT == root || MPI_PROC_NULL == root)) {
|
|
return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ROOT, FUNC_NAME);
|
|
}
|
|
}
|
|
|
|
/* Intracommunicator errors */
|
|
|
|
else {
|
|
if (root < 0 || root >= ompi_comm_size(comm)) {
|
|
return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ROOT, 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. */
|
|
|
|
if (0 == count) {
|
|
return MPI_SUCCESS;
|
|
}
|
|
|
|
/* Invoke the coll component to perform the back-end operation */
|
|
|
|
OBJ_RETAIN(op);
|
|
err = comm->c_coll.coll_reduce(sendbuf, recvbuf, count,
|
|
datatype, op, root, comm);
|
|
OBJ_RELEASE(op);
|
|
OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
|
|
}
|