307 строки
13 KiB
C
307 строки
13 KiB
C
/*
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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) 2004-2012 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) 2008 Sun Microsystems, Inc. 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 "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/communicator/communicator.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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#include "coll_tuned.h"
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#include "coll_tuned_topo.h"
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#include "coll_tuned_util.h"
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int
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ompi_coll_tuned_alltoallv_intra_pairwise(void *sbuf, int *scounts, int *sdisps,
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struct ompi_datatype_t *sdtype,
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void* rbuf, 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 line = -1, err = 0, rank, size, step = 0, sendto, recvfrom;
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void *psnd, *prcv;
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ptrdiff_t sext, rext;
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size = ompi_comm_size(comm);
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rank = ompi_comm_rank(comm);
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OPAL_OUTPUT((ompi_coll_tuned_stream,
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"coll:tuned:alltoallv_intra_pairwise rank %d", rank));
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ompi_datatype_type_extent(sdtype, &sext);
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ompi_datatype_type_extent(rdtype, &rext);
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/* Perform pairwise exchange starting from 1 since local exhange is done */
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for (step = 0; step < size; step++) {
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/* Determine sender and receiver for this step. */
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sendto = (rank + step) % size;
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recvfrom = (rank + size - step) % size;
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/* Determine sending and receiving locations */
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psnd = (char*)sbuf + (ptrdiff_t)sdisps[sendto] * sext;
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prcv = (char*)rbuf + (ptrdiff_t)rdisps[recvfrom] * rext;
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/* send and receive */
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err = ompi_coll_tuned_sendrecv( psnd, scounts[sendto], sdtype, sendto,
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MCA_COLL_BASE_TAG_ALLTOALLV,
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prcv, rcounts[recvfrom], rdtype, recvfrom,
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MCA_COLL_BASE_TAG_ALLTOALLV,
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comm, MPI_STATUS_IGNORE, rank);
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if (MPI_SUCCESS != err) { line = __LINE__; goto err_hndl; }
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}
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return MPI_SUCCESS;
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err_hndl:
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OPAL_OUTPUT((ompi_coll_tuned_stream,
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"%s:%4d\tError occurred %d, rank %2d at step %d", __FILE__, line,
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err, rank, step));
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return err;
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}
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/*
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* Linear functions are copied from the basic coll module. For
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* some small number of nodes and/or small data sizes they are just as
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* fast as tuned/tree based segmenting operations and as such may be
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* selected by the decision functions. These are copied into this module
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* due to the way we select modules in V1. i.e. in V2 we will handle this
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* differently and so will not have to duplicate code.
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* GEF Oct05 after asking Jeff.
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*/
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int
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ompi_coll_tuned_alltoallv_intra_basic_linear(void *sbuf, int *scounts, int *sdisps,
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struct ompi_datatype_t *sdtype,
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void *rbuf, 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, size, rank, err, nreqs;
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char *psnd, *prcv;
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ptrdiff_t sext, rext;
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MPI_Request *preq;
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mca_coll_tuned_module_t *tuned_module = (mca_coll_tuned_module_t*) module;
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mca_coll_tuned_comm_t *data = tuned_module->tuned_data;
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size = ompi_comm_size(comm);
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rank = ompi_comm_rank(comm);
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OPAL_OUTPUT((ompi_coll_tuned_stream,
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"coll:tuned:alltoallv_intra_basic_linear rank %d", rank));
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ompi_datatype_type_extent(sdtype, &sext);
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ompi_datatype_type_extent(rdtype, &rext);
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/* Simple optimization - handle send to self first */
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psnd = ((char *) sbuf) + (ptrdiff_t)sdisps[rank] * sext;
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prcv = ((char *) rbuf) + (ptrdiff_t)rdisps[rank] * rext;
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if (0 != scounts[rank]) {
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err = ompi_datatype_sndrcv(psnd, scounts[rank], sdtype,
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prcv, rcounts[rank], rdtype);
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if (MPI_SUCCESS != err) {
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return err;
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}
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}
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/* If only one process, we're done. */
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if (1 == size) {
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return MPI_SUCCESS;
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}
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/* Now, initiate all send/recv to/from others. */
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nreqs = 0;
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preq = data->mcct_reqs;
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/* Post all receives first */
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for (i = 0; i < size; ++i) {
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if (i == rank || 0 == rcounts[i]) {
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continue;
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}
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prcv = ((char *) rbuf) + (ptrdiff_t)rdisps[i] * rext;
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err = MCA_PML_CALL(irecv_init(prcv, rcounts[i], rdtype,
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i, MCA_COLL_BASE_TAG_ALLTOALLV, comm,
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preq++));
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++nreqs;
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if (MPI_SUCCESS != err) {
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ompi_coll_tuned_free_reqs(data->mcct_reqs, nreqs);
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return err;
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}
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}
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/* Now post all sends */
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for (i = 0; i < size; ++i) {
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if (i == rank || 0 == scounts[i]) {
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continue;
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}
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psnd = ((char *) sbuf) + (ptrdiff_t)sdisps[i] * sext;
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err = MCA_PML_CALL(isend_init(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++));
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++nreqs;
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if (MPI_SUCCESS != err) {
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ompi_coll_tuned_free_reqs(data->mcct_reqs, nreqs);
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return err;
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}
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}
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/* Start your engines. This will never return an error. */
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MCA_PML_CALL(start(nreqs, data->mcct_reqs));
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/* Wait for them all. If there's an error, note that we don't care
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* what the error was -- just that there *was* an error. The PML
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* will finish all requests, even if one or more of them fail.
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* i.e., by the end of this call, all the requests are free-able.
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* So free them anyway -- even if there was an error, and return the
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* error after we free everything. */
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err = ompi_request_wait_all(nreqs, data->mcct_reqs,
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MPI_STATUSES_IGNORE);
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/* Free the requests. */
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ompi_coll_tuned_free_reqs(data->mcct_reqs, nreqs);
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return err;
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}
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/*
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* The following are used by dynamic and forced rules. Publish
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* details of each algorithm and if its forced/fixed/locked in as you add
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* methods/algorithms you must update this and the query/map routines.
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* This routine is called by the component only. This makes sure that
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* the mca parameters are set to their initial values and perms.
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* Module does not call this. They call the forced_getvalues routine
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* instead.
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*/
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int ompi_coll_tuned_alltoallv_intra_check_forced_init(coll_tuned_force_algorithm_mca_param_indices_t
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*mca_param_indices)
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{
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int max_alg = 2, requested_alg;
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ompi_coll_tuned_forced_max_algorithms[ALLTOALLV] = max_alg;
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mca_base_param_reg_int (&mca_coll_tuned_component.super.collm_version,
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"alltoallv_algorithm_count",
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"Number of alltoallv algorithms available",
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false, true, max_alg, NULL);
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mca_param_indices->algorithm_param_index
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= mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version,
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"alltoallv_algorithm",
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"Which alltoallv algorithm is used. "
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"Can be locked down to choice of: 0 ignore, "
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"1 basic linear, 2 pairwise.",
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false, false, 0, NULL);
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if (mca_param_indices->algorithm_param_index < 0) {
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return mca_param_indices->algorithm_param_index;
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}
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mca_base_param_lookup_int(mca_param_indices->algorithm_param_index, &(requested_alg));
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if (0 > requested_alg || requested_alg > max_alg) {
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if (0 == ompi_comm_rank( MPI_COMM_WORLD)) {
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opal_output(0, "Alltoallv algorithm #%d is not available (range [0..%d]). "
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"Switching back to ignore(0)\n",
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requested_alg, max_alg );
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}
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mca_base_param_set_int(mca_param_indices->algorithm_param_index, 0);
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}
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return (MPI_SUCCESS);
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}
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int ompi_coll_tuned_alltoallv_intra_do_forced(void *sbuf, int *scounts, int *sdisps,
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struct ompi_datatype_t *sdtype,
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void* rbuf, 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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mca_coll_tuned_module_t *tuned_module = (mca_coll_tuned_module_t*) module;
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mca_coll_tuned_comm_t *data = tuned_module->tuned_data;
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OPAL_OUTPUT((ompi_coll_tuned_stream,
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"coll:tuned:alltoallv_intra_do_forced selected algorithm %d",
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data->user_forced[ALLTOALLV].algorithm));
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switch (data->user_forced[ALLTOALLV].algorithm) {
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case (0):
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return ompi_coll_tuned_alltoallv_intra_dec_fixed(sbuf, scounts, sdisps, sdtype,
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rbuf, rcounts, rdisps, rdtype,
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comm, module);
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case (1):
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return ompi_coll_tuned_alltoallv_intra_basic_linear(sbuf, scounts, sdisps, sdtype,
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rbuf, rcounts, rdisps, rdtype,
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comm, module);
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case (2):
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return ompi_coll_tuned_alltoallv_intra_pairwise(sbuf, scounts, sdisps, sdtype,
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rbuf, rcounts, rdisps, rdtype,
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comm, module);
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default:
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OPAL_OUTPUT((ompi_coll_tuned_stream,
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"coll:tuned:alltoallv_intra_do_forced attempt to "
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"select algorithm %d when only 0-%d is valid.",
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data->user_forced[ALLTOALLV].algorithm,
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ompi_coll_tuned_forced_max_algorithms[ALLTOALLV]));
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return (MPI_ERR_ARG);
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}
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}
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/* If the user selects dynamic rules and specifies the algorithm to
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* use, then this function is called. */
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int ompi_coll_tuned_alltoallv_intra_do_this(void *sbuf, int *scounts, int *sdisps,
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struct ompi_datatype_t *sdtype,
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void* rbuf, 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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int algorithm)
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{
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OPAL_OUTPUT((ompi_coll_tuned_stream,
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"coll:tuned:alltoallv_intra_do_this selected algorithm %d ",
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algorithm));
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switch (algorithm) {
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case (0):
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return ompi_coll_tuned_alltoallv_intra_dec_fixed(sbuf, scounts, sdisps, sdtype,
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rbuf, rcounts, rdisps, rdtype,
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comm, module);
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case (1):
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return ompi_coll_tuned_alltoallv_intra_basic_linear(sbuf, scounts, sdisps, sdtype,
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rbuf, rcounts, rdisps, rdtype,
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comm, module);
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case (2):
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return ompi_coll_tuned_alltoallv_intra_pairwise(sbuf, scounts, sdisps, sdtype,
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rbuf, rcounts, rdisps, rdtype,
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comm, module);
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default:
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OPAL_OUTPUT((ompi_coll_tuned_stream,
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"coll:tuned:alltoall_intra_do_this attempt to select "
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"algorithm %d when only 0-%d is valid.",
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algorithm, ompi_coll_tuned_forced_max_algorithms[ALLTOALLV]));
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return (MPI_ERR_ARG);
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}
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}
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