171 строка
5.1 KiB
C
171 строка
5.1 KiB
C
/* -*- Mode: C; c-basic-offset:2 ; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2006 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) 2006 The Technical University of Chemnitz. All
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* rights reserved.
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* Copyright (c) 2014-2015 Research Organization for Information Science
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* and Technology (RIST). All rights reserved.
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* Copyright (c) 2015 Los Alamos National Security, LLC. All rights
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* reserved.
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*
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* Author(s): Torsten Hoefler <htor@cs.indiana.edu>
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*
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*/
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#include "nbc_internal.h"
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/* cannot cache schedules because one cannot check locally if the pattern is the same!! */
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#undef NBC_CACHE_SCHEDULE
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#ifdef NBC_CACHE_SCHEDULE
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/* tree comparison function for schedule cache */
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int NBC_Ineighbor_allgatherv_args_compare(NBC_Ineighbor_allgatherv_args *a, NBC_Ineighbor_allgatherv_args *b, void *param) {
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if ((a->sbuf == b->sbuf) &&
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(a->scount == b->scount) &&
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(a->stype == b->stype) &&
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(a->rbuf == b->rbuf) &&
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(a->rcount == b->rcount) &&
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(a->rtype == b->rtype) ) {
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return 0;
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}
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if( a->sbuf < b->sbuf ) {
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return -1;
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}
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return 1;
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}
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#endif
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int ompi_coll_libnbc_ineighbor_allgatherv(const void *sbuf, int scount, MPI_Datatype stype, void *rbuf,
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const int *rcounts, const int *displs, MPI_Datatype rtype,
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struct ompi_communicator_t *comm, ompi_request_t ** request,
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struct mca_coll_base_module_2_1_0_t *module) {
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int res, indegree, outdegree, *srcs, *dsts;
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MPI_Aint rcvext;
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NBC_Handle *handle;
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ompi_coll_libnbc_module_t *libnbc_module = (ompi_coll_libnbc_module_t*) module;
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NBC_Schedule *schedule;
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res = ompi_datatype_type_extent(rtype, &rcvext);
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if (MPI_SUCCESS != res) {
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NBC_Error("MPI Error in ompi_datatype_type_extent() (%i)", res);
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return res;
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}
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#ifdef NBC_CACHE_SCHEDULE
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NBC_Ineighbor_allgatherv_args *args, *found, search;
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/* search schedule in communicator specific tree */
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search.sbuf = sbuf;
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search.scount = scount;
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search.stype = stype;
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search.rbuf = rbuf;
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search.rcount = rcount;
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search.rtype = rtype;
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found = (NBC_Ineighbor_allgatherv_args *) hb_tree_search ((hb_tree *) libnbc_module->NBC_Dict[NBC_NEIGHBOR_ALLGATHERV],
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&search);
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if (NULL == found) {
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#endif
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schedule = OBJ_NEW(NBC_Schedule);
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if (OPAL_UNLIKELY(NULL == schedule)) {
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return OMPI_ERR_OUT_OF_RESOURCE;
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}
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res = NBC_Comm_neighbors(comm, &srcs, &indegree, &dsts, &outdegree);
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if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
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OBJ_RELEASE(schedule);
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return res;
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}
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/* simply loop over neighbors and post send/recv operations */
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for (int i = 0 ; i < indegree ; ++i) {
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if (srcs[i] != MPI_PROC_NULL) {
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res = NBC_Sched_recv ((char *) rbuf + displs[i] * rcvext, false, rcounts[i], rtype, srcs[i], schedule, false);
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if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
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break;
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}
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}
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}
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free (srcs);
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if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
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free (dsts);
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OBJ_RELEASE(schedule);
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return res;
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}
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for (int i = 0 ; i < outdegree ; ++i) {
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if (dsts[i] != MPI_PROC_NULL) {
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res = NBC_Sched_send ((char *) sbuf, false, scount, stype, dsts[i], schedule, false);
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if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
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break;
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}
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}
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}
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free (dsts);
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if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
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OBJ_RELEASE(schedule);
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return res;
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}
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res = NBC_Sched_commit (schedule);
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if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
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OBJ_RELEASE(schedule);
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return res;
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}
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#ifdef NBC_CACHE_SCHEDULE
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/* save schedule to tree */
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args = (NBC_Ineighbor_allgatherv_args *) malloc (sizeof (args));
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if (NULL != args) {
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args->sbuf = sbuf;
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args->scount = scount;
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args->stype = stype;
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args->rbuf = rbuf;
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args->rcount = rcount;
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args->rtype = rtype;
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args->schedule = schedule;
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res = hb_tree_insert ((hb_tree *) libnbc_module->NBC_Dict[NBC_NEIGHBOR_ALLGATHERV], args, args, 0);
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if (0 == res) {
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OBJ_RETAIN(schedule);
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/* increase number of elements for A2A */
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if(++libnbc_module->NBC_Dict_size[NBC_NEIGHBOR_ALLGATHERV] > NBC_SCHED_DICT_UPPER) {
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NBC_SchedCache_dictwipe ((hb_tree *) libnbc_module->NBC_Dict[NBC_NEIGHBOR_ALLGATHERV],
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&libnbc_module->NBC_Dict_size[NBC_NEIGHBOR_ALLGATHERV]);
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}
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} else {
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NBC_Error("error in dict_insert() (%i)", res);
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free (args);
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}
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}
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} else {
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/* found schedule */
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schedule = found->schedule;
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OBJ_RETAIN(schedule);
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}
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#endif
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res = NBC_Init_handle(comm, &handle, libnbc_module);
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if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
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OBJ_RELEASE(schedule);
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return res;
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}
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res = NBC_Start (handle, schedule);
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if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
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NBC_Return_handle (handle);
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OBJ_RELEASE(schedule);
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return OMPI_ERR_OUT_OF_RESOURCE;
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}
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*request = (ompi_request_t *) handle;
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return OMPI_SUCCESS;
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}
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