240 строки
7.6 KiB
C
240 строки
7.6 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) 2013-2015 Los Alamos National Security, LLC. All rights
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* reserved.
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* Copyright (c) 2013 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) 2014-2015 Research Organization for Information Science
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* and Technology (RIST). All rights 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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#ifdef NBC_CACHE_SCHEDULE
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/* tree comparison function for schedule cache */
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int NBC_Scatter_args_compare(NBC_Scatter_args *a, NBC_Scatter_args *b, void *param) {
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if ((a->sendbuf == b->sendbuf) &&
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(a->sendcount == b->sendcount) &&
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(a->sendtype == b->sendtype) &&
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(a->recvbuf == b->recvbuf) &&
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(a->recvcount == b->recvcount) &&
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(a->recvtype == b->recvtype) &&
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(a->root == b->root)) {
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return 0;
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}
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if (a->sendbuf < b->sendbuf) {
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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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/* simple linear MPI_Iscatter */
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int ompi_coll_libnbc_iscatter (const void* sendbuf, int sendcount, MPI_Datatype sendtype,
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void* recvbuf, int recvcount, MPI_Datatype recvtype, int root,
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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 rank, p, res;
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MPI_Aint sndext = 0;
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NBC_Schedule *schedule;
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char *sbuf, inplace;
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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_IN_PLACE(sendbuf, recvbuf, inplace);
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rank = ompi_comm_rank (comm);
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p = ompi_comm_size (comm);
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if (rank == root) {
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res = ompi_datatype_type_extent (sendtype, &sndext);
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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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}
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if ((rank == root) && (!inplace)) {
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sbuf = (char *) sendbuf + rank * sendcount * sndext;
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/* if I am the root - just copy the message (not for MPI_IN_PLACE) */
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res = NBC_Copy (sbuf, sendcount, sendtype, recvbuf, recvcount, recvtype, comm);
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if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
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return res;
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}
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}
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#ifdef NBC_CACHE_SCHEDULE
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NBC_Scatter_args *args, *found, search;
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/* search schedule in communicator specific tree */
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search.sendbuf=sendbuf;
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search.sendcount=sendcount;
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search.sendtype=sendtype;
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search.recvbuf=recvbuf;
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search.recvcount=recvcount;
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search.recvtype=recvtype;
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search.root=root;
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found = (NBC_Scatter_args *) hb_tree_search ((hb_tree *) libnbc_module->NBC_Dict[NBC_SCATTER], &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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/* receive from root */
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if (rank != root) {
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/* recv msg from root */
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res = NBC_Sched_recv (recvbuf, false, recvcount, recvtype, root, schedule, false);
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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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} else {
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for (int i = 0 ; i < p ; ++i) {
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sbuf = (char *) sendbuf + i * sendcount * sndext;
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if (i != root) {
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/* root sends the right buffer to the right receiver */
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res = NBC_Sched_send (sbuf, false, sendcount, sendtype, i, schedule, false);
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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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}
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}
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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_Scatter_args *) malloc (sizeof (args));
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if (NULL != args) {
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args->sendbuf = sendbuf;
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args->sendcount = sendcount;
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args->sendtype = sendtype;
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args->recvbuf = recvbuf;
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args->recvcount = recvcount;
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args->recvtype = recvtype;
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args->root = root;
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args->schedule = schedule;
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res = hb_tree_insert ((hb_tree *) libnbc_module->NBC_Dict[NBC_SCATTER], 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_SCATTER] > NBC_SCHED_DICT_UPPER) {
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NBC_SchedCache_dictwipe ((hb_tree *) libnbc_module->NBC_Dict[NBC_SCATTER],
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&libnbc_module->NBC_Dict_size[NBC_SCATTER]);
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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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return res;
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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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int ompi_coll_libnbc_iscatter_inter (const void* sendbuf, int sendcount, MPI_Datatype sendtype,
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void* recvbuf, int recvcount, MPI_Datatype recvtype, int root,
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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, rsize;
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MPI_Aint sndext;
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NBC_Schedule *schedule;
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char *sbuf;
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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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rsize = ompi_comm_remote_size (comm);
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if (MPI_ROOT == root) {
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res = ompi_datatype_type_extent(sendtype, &sndext);
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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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}
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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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/* receive from root */
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if (MPI_ROOT != root && MPI_PROC_NULL != root) {
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/* recv msg from remote root */
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res = NBC_Sched_recv(recvbuf, false, recvcount, recvtype, root, schedule, false);
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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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} else if (MPI_ROOT == root) {
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for (int i = 0 ; i < rsize ; ++i) {
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sbuf = ((char *)sendbuf) + (i * sendcount * sndext);
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/* root sends the right buffer to the right receiver */
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res = NBC_Sched_send(sbuf, false, sendcount, sendtype, i, schedule, false);
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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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}
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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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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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return res;
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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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