366d64b7e5
As we changed the ABI (forcing a major release), we can limit the size of the predefined communicators by moving the collective structure outside the communicator. This might have a minimal, but unnoticeable, impact on performance. This approach has been discussed during the January 2017 devel meeting. Signed-off-by: George Bosilca <bosilca@icl.utk.edu> Signed-off-by: Joshua Hursey <jhursey@us.ibm.com>
92 строки
3.1 KiB
C
92 строки
3.1 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2017 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2006-2009 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2013 Los Alamos National Security, LLC. All rights
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* reserved.
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* Copyright (c) 2015 Research Organization for Information Science
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* and Technology (RIST). All rights reserved.
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* Copyright (c) 2016-2017 IBM Corporation. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include <stdio.h>
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#include "ompi/mpi/c/bindings.h"
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#include "ompi/runtime/params.h"
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#include "ompi/communicator/communicator.h"
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#include "ompi/errhandler/errhandler.h"
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#include "ompi/datatype/ompi_datatype.h"
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#include "ompi/op/op.h"
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#include "ompi/memchecker.h"
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#if OMPI_BUILD_MPI_PROFILING
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#if OPAL_HAVE_WEAK_SYMBOLS
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#pragma weak MPI_Reduce_local = PMPI_Reduce_local
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#endif
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#define MPI_Reduce_local PMPI_Reduce_local
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#endif
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static const char FUNC_NAME[] = "MPI_Reduce_local";
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int MPI_Reduce_local(const void *inbuf, void *inoutbuf, int count,
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MPI_Datatype datatype, MPI_Op op)
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{
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int err;
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MEMCHECKER(
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memchecker_datatype(datatype);
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);
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if (MPI_PARAM_CHECK) {
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char *msg;
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err = MPI_SUCCESS;
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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if (MPI_OP_NULL == op || NULL == op) {
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err = MPI_ERR_OP;
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} else if (!ompi_op_is_valid(op, datatype, &msg, FUNC_NAME)) {
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int ret = OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_OP, msg);
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free(msg);
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return ret;
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} else {
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OMPI_CHECK_DATATYPE_FOR_SEND(err, datatype, count);
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}
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OMPI_ERRHANDLER_CHECK(err, MPI_COMM_WORLD, err, FUNC_NAME);
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}
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/* If the count is 0, just return */
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if (0 == count) {
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return MPI_SUCCESS;
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}
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OPAL_CR_ENTER_LIBRARY();
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/* Invoke the op component to perform the back-end operation */
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OBJ_RETAIN(op);
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OBJ_RETAIN(datatype);
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// Since there is no 'comm' parameter to this interface use 'self' since
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// this is a local operation to this process.
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ompi_communicator_t *comm = &ompi_mpi_comm_self.comm;
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err = comm->c_coll->coll_reduce_local(inbuf, inoutbuf, count, datatype, op,
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comm->c_coll->coll_reduce_local_module);
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OBJ_RELEASE(datatype);
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OBJ_RELEASE(op);
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OMPI_ERRHANDLER_RETURN(err, MPI_COMM_WORLD, err, FUNC_NAME);
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}
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