257 строки
11 KiB
C
257 строки
11 KiB
C
/*
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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 Los Alamos National Security, LLC. 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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* Copyright (c) 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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*
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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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/* an reduce_csttare schedule can not be cached easily because the contents
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* ot the recvcounts array may change, so a comparison of the address
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* would not be sufficient ... we simply do not cache it */
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/* binomial reduce to rank 0 followed by a linear scatter ...
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*
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* Algorithm:
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* pairwise exchange
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* round r:
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* grp = rank % 2^r
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* if grp == 0: receive from rank + 2^(r-1) if it exists and reduce value
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* if grp == 1: send to rank - 2^(r-1) and exit function
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*
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* do this for R=log_2(p) rounds
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*
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*/
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int ompi_coll_libnbc_ireduce_scatter(void* sendbuf, void* recvbuf, int *recvcounts, MPI_Datatype datatype,
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MPI_Op op, 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 peer, rank, maxr, p, r, res, count, offset, firstred;
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MPI_Aint ext;
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char *redbuf, *sbuf, inplace;
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NBC_Schedule *schedule;
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NBC_Handle *handle;
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ompi_coll_libnbc_request_t **coll_req = (ompi_coll_libnbc_request_t**) request;
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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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res = NBC_Init_handle(comm, coll_req, libnbc_module);
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if(res != NBC_OK) { printf("Error in NBC_Init_handle(%i)\n", res); return res; }
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res = MPI_Comm_size(comm, &p);
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if (MPI_SUCCESS != res) { printf("MPI Error in MPI_Comm_size() (%i)\n", res); return res; }
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if(p==1) {
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if(!inplace) {
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/* single node not in_place: copy data to recvbuf */
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res = NBC_Copy(sendbuf, recvcounts[0], datatype, recvbuf, recvcounts[0], datatype, comm);
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if (NBC_OK != res) { printf("Error in NBC_Copy() (%i)\n", res); return res; }
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}
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/* manually complete the request */
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(*request)->req_status.MPI_ERROR = OMPI_SUCCESS;
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OPAL_THREAD_LOCK(&ompi_request_lock);
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ompi_request_complete(*request, true);
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OPAL_THREAD_UNLOCK(&ompi_request_lock);
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return NBC_OK;
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}
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handle = (*coll_req);
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res = MPI_Comm_rank(comm, &rank);
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if (MPI_SUCCESS != res) { printf("MPI Error in MPI_Comm_rank() (%i)\n", res); return res; }
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res = MPI_Type_extent(datatype, &ext);
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if (MPI_SUCCESS != res) { printf("MPI Error in MPI_Type_extent() (%i)\n", res); return res; }
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schedule = (NBC_Schedule*)malloc(sizeof(NBC_Schedule));
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if (NULL == schedule) { printf("Error in malloc()\n"); return NBC_OOR; }
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res = NBC_Sched_create(schedule);
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if(res != NBC_OK) { printf("Error in NBC_Sched_create (%i)\n", res); return res; }
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maxr = (int)ceil((log((double)p)/LOG2));
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count = 0;
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for(r=0;r<p;r++) count += recvcounts[r];
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handle->tmpbuf = malloc(ext*count*2);
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if(handle->tmpbuf == NULL) { printf("Error in malloc()\n"); return NBC_OOR; }
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redbuf = ((char*)handle->tmpbuf)+(ext*count);
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firstred = 1;
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for(r=1; r<=maxr; r++) {
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if((rank % (1<<r)) == 0) {
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/* we have to receive this round */
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peer = rank + (1<<(r-1));
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if(peer<p) {
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res = NBC_Sched_recv(0, true, count, datatype, peer, schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_recv() (%i)\n", res); return res; }
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/* we have to wait until we have the data */
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res = NBC_Sched_barrier(schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_barrier() (%i)\n", res); return res; }
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if(firstred) {
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/* take reduce data from the sendbuf in the first round -> save copy */
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res = NBC_Sched_op(redbuf-(unsigned long)handle->tmpbuf, true, sendbuf, false, 0, true, count, datatype, op, schedule);
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firstred = 0;
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} else {
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/* perform the reduce in my local buffer */
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res = NBC_Sched_op(redbuf-(unsigned long)handle->tmpbuf, true, redbuf-(unsigned long)handle->tmpbuf, true, 0, true, count, datatype, op, schedule);
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}
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_op() (%i)\n", res); return res; }
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/* this cannot be done until handle->tmpbuf is unused :-( */
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res = NBC_Sched_barrier(schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_barrier() (%i)\n", res); return res; }
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}
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} else {
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/* we have to send this round */
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peer = rank - (1<<(r-1));
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if(firstred) {
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/* we have to send the senbuf */
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res = NBC_Sched_send(sendbuf, false, count, datatype, peer, schedule);
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} else {
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/* we send an already reduced value from redbuf */
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res = NBC_Sched_send(redbuf-(unsigned long)handle->tmpbuf, true, count, datatype, peer, schedule);
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}
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_send() (%i)\n", res); return res; }
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/* leave the game */
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break;
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}
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}
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res = NBC_Sched_barrier(schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_barrier() (%i)\n", res); return res; }
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/* rank 0 is root and sends - all others receive */
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if(rank != 0) {
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res = NBC_Sched_recv(recvbuf, false, recvcounts[rank], datatype, 0, schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_recv() (%i)\n", res); return res; }
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}
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if(rank == 0) {
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offset = 0;
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for(r=1;r<p;r++) {
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offset += recvcounts[r-1];
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sbuf = ((char *)redbuf) + (offset*ext);
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/* root sends the right buffer to the right receiver */
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res = NBC_Sched_send(sbuf-(unsigned long)handle->tmpbuf, true, recvcounts[r], datatype, r, schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_send() (%i)\n", res); return res; }
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}
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res = NBC_Sched_copy(redbuf-(unsigned long)handle->tmpbuf, true, recvcounts[0], datatype, recvbuf, false, recvcounts[0], datatype, schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_copy() (%i)\n", res); return res; }
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}
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/*NBC_PRINT_SCHED(*schedule);*/
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res = NBC_Sched_commit(schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_commit() (%i)\n", res); return res; }
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res = NBC_Start(handle, schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Start() (%i)\n", res); return res; }
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/* tmpbuf is freed with the handle */
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return NBC_OK;
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}
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int ompi_coll_libnbc_ireduce_scatter_inter(void* sendbuf, void* recvbuf, int *recvcounts, MPI_Datatype datatype,
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MPI_Op op, 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 peer, rank, r, res, count, rsize, offset;
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MPI_Aint ext;
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NBC_Schedule *schedule;
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NBC_Handle *handle;
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ompi_coll_libnbc_request_t **coll_req = (ompi_coll_libnbc_request_t**) request;
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ompi_coll_libnbc_module_t *libnbc_module = (ompi_coll_libnbc_module_t*) module;
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res = NBC_Init_handle(comm, coll_req, libnbc_module);
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if(res != NBC_OK) { printf("Error in NBC_Init_handle(%i)\n", res); return res; }
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handle = (*coll_req);
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res = MPI_Comm_rank(comm, &rank);
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if (MPI_SUCCESS != res) { printf("MPI Error in MPI_Comm_rank() (%i)\n", res); return res; }
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res = MPI_Comm_remote_size(comm, &rsize);
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if (MPI_SUCCESS != res) { printf("MPI Error in MPI_Comm_remote_size() (%i)\n", res); return res; }
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res = MPI_Type_extent(datatype, &ext);
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if (MPI_SUCCESS != res) { printf("MPI Error in MPI_Type_extent() (%i)\n", res); return res; }
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schedule = (NBC_Schedule*)malloc(sizeof(NBC_Schedule));
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if (NULL == schedule) { printf("Error in malloc()\n"); return NBC_OOR; }
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res = NBC_Sched_create(schedule);
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if(res != NBC_OK) { printf("Error in NBC_Sched_create (%i)\n", res); return res; }
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count = 0;
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for (r = 0 ; r < rsize ; ++r) count += recvcounts[r];
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handle->tmpbuf = malloc(2 * ext * count);
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if(handle->tmpbuf == NULL) { printf("Error in malloc()\n"); return NBC_OOR; }
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/* send my data to the remote root */
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res = NBC_Sched_send(sendbuf, false, count, datatype, 0, schedule);
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if (NBC_OK != res) { printf("Error in NBC_Sched_send() (%i)\n", res); return res; }
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if (0 == rank) {
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res = NBC_Sched_recv((void *) 0, true, count, datatype, 0, schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_recv() (%i)\n", res); return res; }
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res = NBC_Sched_barrier(schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_barrier() (%i)\n", res); return res; }
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for (peer = 1 ; peer < rsize ; ++peer) {
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res = NBC_Sched_recv((void *)(ext * count), true, count, datatype, peer, schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_recv() (%i)\n", res); return res; }
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res = NBC_Sched_barrier(schedule);
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if (NBC_OK != res) { printf("Error in NBC_Sched_barrier() (%i)\n", res); return res; }
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res = NBC_Sched_op((void *) 0, true, (void *)(ext * count), true, (void *) 0, true, count, datatype, op, schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_op() (%i)\n", res); return res; }
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res = NBC_Sched_barrier(schedule);
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if (NBC_OK != res) { printf("Error in NBC_Sched_barrier() (%i)\n", res); return res; }
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}
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/* exchange data with remote root for scatter phase (we *could* use the local communicator to do the scatter) */
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res = NBC_Sched_recv((void *)(ext * count), true, count, datatype, 0, schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_recv() (%i)\n", res); return res; }
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res = NBC_Sched_send((void *) 0, true, count, datatype, 0, schedule);
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if (NBC_OK != res) { printf("Error in NBC_Sched_send() (%i)\n", res); return res; }
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res = NBC_Sched_barrier(schedule);
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if (NBC_OK != res) { printf("Error in NBC_Sched_barrier() (%i)\n", res); return res; }
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/* scatter */
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for (peer = 0, offset = ext * count ; peer < rsize ; ++peer) {
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res = NBC_Sched_send((void *)(uintptr_t) offset, true, recvcounts[peer], datatype, peer, schedule);
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if (NBC_OK != res) { printf("Error in NBC_Sched_send() (%i)\n", res); return res; }
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offset += recvcounts[peer] * ext;
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}
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}
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/* receive my block */
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res = NBC_Sched_recv(recvbuf, false, recvcounts[rank], datatype, 0, schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_recv() (%i)\n", res); return res; }
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/*NBC_PRINT_SCHED(*schedule);*/
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res = NBC_Sched_commit(schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Sched_commit() (%i)\n", res); return res; }
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res = NBC_Start(handle, schedule);
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if (NBC_OK != res) { free(handle->tmpbuf); printf("Error in NBC_Start() (%i)\n", res); return res; }
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/* tmpbuf is freed with the handle */
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return NBC_OK;
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}
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