110 строки
3.6 KiB
C
110 строки
3.6 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2004-2005 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) 2004-2015 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) 2004-2005 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) 2013 Los Alamos National Security, LLC. All rights
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* reserved.
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* Copyright (c) 2013 FUJITSU LIMITED. All rights reserved.
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* Copyright (c) 2014 Research Organization for Information Science
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* and Technology (RIST). 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 "coll_basic.h"
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#include "mpi.h"
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#include "ompi/constants.h"
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#include "ompi/datatype/ompi_datatype.h"
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#include "ompi/mca/coll/coll.h"
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#include "ompi/mca/coll/base/coll_tags.h"
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#include "ompi/mca/pml/pml.h"
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/*
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* alltoallv_inter
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*
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* Function: - MPI_Alltoallv
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* Accepts: - same as MPI_Alltoallv()
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* Returns: - MPI_SUCCESS or an MPI error code
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*/
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int
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mca_coll_basic_alltoallv_inter(void *sbuf, int *scounts, int *sdisps,
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struct ompi_datatype_t *sdtype, void *rbuf,
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int *rcounts, int *rdisps,
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struct ompi_datatype_t *rdtype,
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struct ompi_communicator_t *comm,
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mca_coll_base_module_t *module)
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{
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int i;
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int rsize;
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int err;
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char *psnd;
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char *prcv;
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size_t nreqs;
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MPI_Aint sndextent;
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MPI_Aint rcvextent;
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mca_coll_basic_module_t *basic_module = (mca_coll_basic_module_t*) module;
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ompi_request_t **preq = basic_module->mccb_reqs;
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/* Initialize. */
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rsize = ompi_comm_remote_size(comm);
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ompi_datatype_type_extent(sdtype, &sndextent);
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ompi_datatype_type_extent(rdtype, &rcvextent);
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/* Initiate all send/recv to/from others. */
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nreqs = rsize * 2;
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/* Post all receives first */
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/* A simple optimization: do not send and recv msgs of length zero */
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for (i = 0; i < rsize; ++i) {
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prcv = ((char *) rbuf) + (rdisps[i] * rcvextent);
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if (rcounts[i] > 0) {
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err = MCA_PML_CALL(irecv(prcv, rcounts[i], rdtype,
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i, MCA_COLL_BASE_TAG_ALLTOALLV, comm,
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&preq[i]));
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if (MPI_SUCCESS != err) {
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return err;
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}
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} else {
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preq[i] = MPI_REQUEST_NULL;
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}
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}
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/* Now post all sends */
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for (i = 0; i < rsize; ++i) {
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psnd = ((char *) sbuf) + (sdisps[i] * sndextent);
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if (scounts[i] > 0) {
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err = MCA_PML_CALL(isend(psnd, scounts[i], sdtype,
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i, MCA_COLL_BASE_TAG_ALLTOALLV,
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MCA_PML_BASE_SEND_STANDARD, comm,
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&preq[rsize + i]));
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if (MPI_SUCCESS != err) {
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return err;
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}
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} else {
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preq[rsize + i] = MPI_REQUEST_NULL;
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}
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}
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err = ompi_request_wait_all(nreqs, preq, MPI_STATUSES_IGNORE);
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/* All done */
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return err;
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}
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