/* * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana * University Research and Technology * Corporation. All rights reserved. * Copyright (c) 2004-2006 The University of Tennessee and The University * of Tennessee Research Foundation. 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 (c) 2008 Sun Microsystems, Inc. All rights reserved. * $COPYRIGHT$ * * Additional copyrights may follow * * $HEADER$ */ #include "ompi_config.h" #include "mpi.h" #include "ompi/constants.h" #include "ompi/datatype/ompi_datatype.h" #include "ompi/communicator/communicator.h" #include "ompi/mca/coll/coll.h" #include "ompi/mca/coll/base/coll_tags.h" #include "ompi/mca/pml/pml.h" #include "coll_tuned.h" #include "coll_tuned_topo.h" #include "coll_tuned_util.h" int ompi_coll_tuned_alltoallv_intra_pairwise(void *sbuf, int *scounts, int *sdisps, struct ompi_datatype_t *sdtype, void* rbuf, int *rcounts, int *rdisps, struct ompi_datatype_t *rdtype, struct ompi_communicator_t *comm, mca_coll_base_module_t *module) { int line = -1, err = 0; int rank, size, step; int sendto, recvfrom; void *psnd, *prcv; ptrdiff_t sext, rext; size = ompi_comm_size(comm); rank = ompi_comm_rank(comm); OPAL_OUTPUT((ompi_coll_tuned_stream, "coll:tuned:alltoallv_intra_pairwise rank %d", rank)); ompi_datatype_type_extent(sdtype, &sext); ompi_datatype_type_extent(rdtype, &rext); psnd = ((char *) sbuf) + (sdisps[rank] * sext); prcv = ((char *) rbuf) + (rdisps[rank] * rext); if (0 != scounts[rank]) { err = ompi_datatype_sndrcv(psnd, scounts[rank], sdtype, prcv, rcounts[rank], rdtype); if (MPI_SUCCESS != err) { return err; } } /* If only one process, we're done. */ if (1 == size) { return MPI_SUCCESS; } /* Perform pairwise exchange starting from 1 since local exhange is done */ for (step = 1; step < size + 1; step++) { /* Determine sender and receiver for this step. */ sendto = (rank + step) % size; recvfrom = (rank + size - step) % size; /* Determine sending and receiving locations */ psnd = (char*)sbuf + sdisps[sendto] * sext; prcv = (char*)rbuf + rdisps[recvfrom] * rext; /* send and receive */ err = ompi_coll_tuned_sendrecv( psnd, scounts[sendto], sdtype, sendto, MCA_COLL_BASE_TAG_ALLTOALLV, prcv, rcounts[recvfrom], rdtype, recvfrom, MCA_COLL_BASE_TAG_ALLTOALLV, comm, MPI_STATUS_IGNORE, rank); if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; } } return MPI_SUCCESS; err_hndl: OPAL_OUTPUT((ompi_coll_tuned_stream, "%s:%4d\tError occurred %d, rank %2d", __FILE__, line, err, rank)); return err; } /* * Linear functions are copied from the basic coll module. For * some small number of nodes and/or small data sizes they are just as * fast as tuned/tree based segmenting operations and as such may be * selected by the decision functions. These are copied into this module * due to the way we select modules in V1. i.e. in V2 we will handle this * differently and so will not have to duplicate code. * GEF Oct05 after asking Jeff. */ int ompi_coll_tuned_alltoallv_intra_basic_linear(void *sbuf, int *scounts, int *sdisps, struct ompi_datatype_t *sdtype, void *rbuf, int *rcounts, int *rdisps, struct ompi_datatype_t *rdtype, struct ompi_communicator_t *comm, mca_coll_base_module_t *module) { int i, size, rank, err; char *psnd, *prcv; int nreqs; ptrdiff_t sext, rext; MPI_Request *preq; mca_coll_tuned_module_t *tuned_module = (mca_coll_tuned_module_t*) module; mca_coll_tuned_comm_t *data = tuned_module->tuned_data; size = ompi_comm_size(comm); rank = ompi_comm_rank(comm); OPAL_OUTPUT((ompi_coll_tuned_stream, "coll:tuned:alltoallv_intra_basic_linear rank %d", rank)); ompi_datatype_type_extent(sdtype, &sext); ompi_datatype_type_extent(rdtype, &rext); /* Simple optimization - handle send to self first */ psnd = ((char *) sbuf) + (sdisps[rank] * sext); prcv = ((char *) rbuf) + (rdisps[rank] * rext); if (0 != scounts[rank]) { err = ompi_datatype_sndrcv(psnd, scounts[rank], sdtype, prcv, rcounts[rank], rdtype); if (MPI_SUCCESS != err) { return err; } } /* If only one process, we're done. */ if (1 == size) { return MPI_SUCCESS; } /* Now, initiate all send/recv to/from others. */ nreqs = 0; preq = data->mcct_reqs; /* Post all receives first */ for (i = 0; i < size; ++i) { if (i == rank || 0 == rcounts[i]) { continue; } prcv = ((char *) rbuf) + (rdisps[i] * rext); err = MCA_PML_CALL(irecv_init(prcv, rcounts[i], rdtype, i, MCA_COLL_BASE_TAG_ALLTOALLV, comm, preq++)); ++nreqs; if (MPI_SUCCESS != err) { ompi_coll_tuned_free_reqs(data->mcct_reqs, nreqs); return err; } } /* Now post all sends */ for (i = 0; i < size; ++i) { if (i == rank || 0 == scounts[i]) { continue; } psnd = ((char *) sbuf) + (sdisps[i] * sext); err = MCA_PML_CALL(isend_init(psnd, scounts[i], sdtype, i, MCA_COLL_BASE_TAG_ALLTOALLV, MCA_PML_BASE_SEND_STANDARD, comm, preq++)); ++nreqs; if (MPI_SUCCESS != err) { ompi_coll_tuned_free_reqs(data->mcct_reqs, nreqs); return err; } } /* Start your engines. This will never return an error. */ MCA_PML_CALL(start(nreqs, data->mcct_reqs)); /* Wait for them all. If there's an error, note that we don't care * what the error was -- just that there *was* an error. The PML * will finish all requests, even if one or more of them fail. * i.e., by the end of this call, all the requests are free-able. * So free them anyway -- even if there was an error, and return the * error after we free everything. */ err = ompi_request_wait_all(nreqs, data->mcct_reqs, MPI_STATUSES_IGNORE); /* Free the requests. */ ompi_coll_tuned_free_reqs(data->mcct_reqs, nreqs); return err; } /* * The following are used by dynamic and forced rules. Publish * details of each algorithm and if its forced/fixed/locked in as you add * methods/algorithms you must update this and the query/map routines. * This routine is called by the component only. This makes sure that * the mca parameters are set to their initial values and perms. * Module does not call this. They call the forced_getvalues routine * instead. */ int ompi_coll_tuned_alltoallv_intra_check_forced_init(coll_tuned_force_algorithm_mca_param_indices_t *mca_param_indices) { int max_alg = 2, requested_alg; ompi_coll_tuned_forced_max_algorithms[ALLTOALLV] = max_alg; mca_base_param_reg_int (&mca_coll_tuned_component.super.collm_version, "alltoallv_algorithm_count", "Number of alltoallv algorithms available", false, true, max_alg, NULL); mca_param_indices->algorithm_param_index = mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version, "alltoallv_algorithm", "Which alltoallv algorithm is used. " "Can be locked down to choice of: 0 ignore, " "1 basic linear, 2 pairwise.", false, false, 0, NULL); if (mca_param_indices->algorithm_param_index < 0) { return mca_param_indices->algorithm_param_index; } mca_base_param_lookup_int(mca_param_indices->algorithm_param_index, &(requested_alg)); if (0 > requested_alg || requested_alg > max_alg) { if (0 == ompi_comm_rank( MPI_COMM_WORLD)) { opal_output(0, "Alltoallv algorithm #%d is not available (range [0..%d]). " "Switching back to ignore(0)\n", requested_alg, max_alg ); } mca_base_param_set_int(mca_param_indices->algorithm_param_index, 0); } return (MPI_SUCCESS); } int ompi_coll_tuned_alltoallv_intra_do_forced(void *sbuf, int *scounts, int *sdisps, struct ompi_datatype_t *sdtype, void* rbuf, int *rcounts, int *rdisps, struct ompi_datatype_t *rdtype, struct ompi_communicator_t *comm, mca_coll_base_module_t *module) { mca_coll_tuned_module_t *tuned_module = (mca_coll_tuned_module_t*) module; mca_coll_tuned_comm_t *data = tuned_module->tuned_data; OPAL_OUTPUT((ompi_coll_tuned_stream, "coll:tuned:alltoallv_intra_do_forced selected algorithm %d", data->user_forced[ALLTOALLV].algorithm)); switch (data->user_forced[ALLTOALLV].algorithm) { case (0): return ompi_coll_tuned_alltoallv_intra_dec_fixed(sbuf, scounts, sdisps, sdtype, rbuf, rcounts, rdisps, rdtype, comm, module); case (1): return ompi_coll_tuned_alltoallv_intra_basic_linear(sbuf, scounts, sdisps, sdtype, rbuf, rcounts, rdisps, rdtype, comm, module); case (2): return ompi_coll_tuned_alltoallv_intra_pairwise(sbuf, scounts, sdisps, sdtype, rbuf, rcounts, rdisps, rdtype, comm, module); default: OPAL_OUTPUT((ompi_coll_tuned_stream, "coll:tuned:alltoallv_intra_do_forced attempt to " "select algorithm %d when only 0-%d is valid.", data->user_forced[ALLTOALLV].algorithm, ompi_coll_tuned_forced_max_algorithms[ALLTOALLV])); return (MPI_ERR_ARG); } } /* If the user selects dynamic rules and specifies the algorithm to * use, then this function is called. */ int ompi_coll_tuned_alltoallv_intra_do_this(void *sbuf, int *scounts, int *sdisps, struct ompi_datatype_t *sdtype, void* rbuf, int *rcounts, int *rdisps, struct ompi_datatype_t *rdtype, struct ompi_communicator_t *comm, mca_coll_base_module_t *module, int algorithm) { OPAL_OUTPUT((ompi_coll_tuned_stream, "coll:tuned:alltoallv_intra_do_this selected algorithm %d ", algorithm)); switch (algorithm) { case (0): return ompi_coll_tuned_alltoallv_intra_dec_fixed(sbuf, scounts, sdisps, sdtype, rbuf, rcounts, rdisps, rdtype, comm, module); case (1): return ompi_coll_tuned_alltoallv_intra_basic_linear(sbuf, scounts, sdisps, sdtype, rbuf, rcounts, rdisps, rdtype, comm, module); case (2): return ompi_coll_tuned_alltoallv_intra_pairwise(sbuf, scounts, sdisps, sdtype, rbuf, rcounts, rdisps, rdtype, comm, module); default: OPAL_OUTPUT((ompi_coll_tuned_stream, "coll:tuned:alltoall_intra_do_this attempt to select " "algorithm %d when only 0-%d is valid.", algorithm, ompi_coll_tuned_forced_max_algorithms[ALLTOALLV])); return (MPI_ERR_ARG); } }