0f0c27a184
Allowing MPI_PROC_NULL as a neighbor in any topology allows us to add gaps on the send and recv buffers. This does make the traditional neighbor collective have a similar behavior as the V version, but in same time it allows the users to skip the step where they prepare the counts and the displacement array. For more info please take a look at issue #4675. Signed-off-by: George Bosilca <bosilca@icl.utk.edu>
109 строки
4.9 KiB
C
109 строки
4.9 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2008 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) 2011-2018 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) 2009 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2013-2014 Los Alamos National Security, LLC. All rights
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* reserved.
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* Copyright (c) 2012-2013 Inria. All rights 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) 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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* Author(s): Torsten Hoefler
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*
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*/
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#include "ompi_config.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/memchecker.h"
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#include "ompi/mca/topo/topo.h"
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#include "ompi/mca/topo/base/base.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_Dist_graph_create_adjacent = PMPI_Dist_graph_create_adjacent
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#endif
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#define MPI_Dist_graph_create_adjacent PMPI_Dist_graph_create_adjacent
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#endif
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static const char FUNC_NAME[] = "MPI_Dist_graph_create_adjacent";
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int MPI_Dist_graph_create_adjacent(MPI_Comm comm_old,
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int indegree, const int sources[],
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const int sourceweights[], int outdegree,
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const int destinations[], const int destweights[],
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MPI_Info info, int reorder,
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MPI_Comm *comm_dist_graph)
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{
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mca_topo_base_module_t* topo;
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int i, comm_size, err;
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MEMCHECKER(
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memchecker_comm(comm_old);
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);
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if (MPI_PARAM_CHECK) {
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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if (ompi_comm_invalid(comm_old)) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM,
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FUNC_NAME);
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} else if (OMPI_COMM_IS_INTER(comm_old)) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM,
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FUNC_NAME);
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} else if (indegree < 0 || outdegree < 0 || NULL == comm_dist_graph) {
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return OMPI_ERRHANDLER_INVOKE(comm_old, MPI_ERR_ARG,
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"MPI_Dist_graph_create_adjacent negative degree");
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} else if ((indegree > 0 &&
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(NULL == sources || NULL == sourceweights)) ||
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(outdegree > 0 &&
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(NULL == destinations || NULL == destweights))) {
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return OMPI_ERRHANDLER_INVOKE(comm_old, MPI_ERR_ARG, "MPI_Dist_graph_create_adjacent mismatched sources or destinations");
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}
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comm_size = ompi_comm_size(comm_old);
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for (i = 0; i < indegree; ++i) {
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if (((sources[i] < 0) && (sources[i] != MPI_PROC_NULL)) || sources[i] >= comm_size) {
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return OMPI_ERRHANDLER_INVOKE(comm_old, MPI_ERR_ARG,
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"MPI_Dist_graph_create_adjacent invalid sources");
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} else if (MPI_UNWEIGHTED != sourceweights && sourceweights[i] < 0) {
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return OMPI_ERRHANDLER_INVOKE(comm_old, MPI_ERR_ARG,
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"MPI_Dist_graph_create_adjacent invalid sourceweights");
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}
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}
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for (i = 0; i < outdegree; ++i) {
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if (((destinations[i] < 0) && (destinations[i] != MPI_PROC_NULL)) || destinations[i] >= comm_size) {
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return OMPI_ERRHANDLER_INVOKE(comm_old, MPI_ERR_ARG,
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"MPI_Dist_graph_create_adjacent invalid destinations");
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} else if (MPI_UNWEIGHTED != destweights && destweights[i] < 0) {
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return OMPI_ERRHANDLER_INVOKE(comm_old, MPI_ERR_ARG,
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"MPI_Dist_graph_create_adjacent invalid destweights");
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}
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}
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}
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/* Ensure there is a topo attached to this communicator */
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if(OMPI_SUCCESS != (err = mca_topo_base_comm_select(comm_old, NULL,
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&topo, OMPI_COMM_DIST_GRAPH))) {
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return OMPI_ERRHANDLER_INVOKE(comm_old, err, FUNC_NAME);
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}
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err = topo->topo.dist_graph.dist_graph_create_adjacent(topo, comm_old, indegree,
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sources, sourceweights, outdegree,
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destinations, destweights, &(info->super),
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reorder, comm_dist_graph);
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OMPI_ERRHANDLER_RETURN(err, comm_old, err, FUNC_NAME);
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}
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