532 строки
20 KiB
C
532 строки
20 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) 2004-2006 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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* $COPYRIGHT$
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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/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 "ompi/op/op.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 ompi_coll_tuned_alltoall_intra_pairwise(void *sbuf, int scount,
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struct ompi_datatype_t *sdtype,
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void* rbuf, int rcount,
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struct ompi_datatype_t *rdtype,
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struct ompi_communicator_t *comm)
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{
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int line = -1, err = 0;
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int rank, size, step;
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int sendto, recvfrom;
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void * tmpsend, *tmprecv;
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ptrdiff_t lb, 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,"coll:tuned:alltoall_intra_pairwise rank %d", rank));
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err = ompi_ddt_get_extent (sdtype, &lb, &sext);
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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err = ompi_ddt_get_extent (rdtype, &lb, &rext);
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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/* Perform pairwise exchange - starting from 1 so the local copy is last */
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for (step = 1; step < size+1; step++) {
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/* who do we talk to in this step? */
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sendto = (rank+step)%size;
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recvfrom = (rank+size-step)%size;
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/* where from are we sending and where from are we receiving actual data ? */
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tmpsend = (char*)sbuf+sendto*sext*scount;
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tmprecv = (char*)rbuf+recvfrom*rext*rcount;
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/* send and receive */
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err = ompi_coll_tuned_sendrecv( tmpsend, scount, sdtype, sendto, MCA_COLL_BASE_TAG_ALLTOALL,
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tmprecv, rcount, rdtype, recvfrom, MCA_COLL_BASE_TAG_ALLTOALL,
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comm, MPI_STATUS_IGNORE, rank);
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if (err != MPI_SUCCESS) { 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,"%s:%4d\tError occurred %d, rank %2d", __FILE__,line,err,rank));
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return err;
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}
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int ompi_coll_tuned_alltoall_intra_bruck(void *sbuf, int scount,
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struct ompi_datatype_t *sdtype,
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void* rbuf, int rcount,
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struct ompi_datatype_t *rdtype,
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struct ompi_communicator_t *comm)
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{
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int i, k, line = -1;
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int rank, size;
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int sendto, recvfrom, distance, *displs=NULL, *blen=NULL;
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int maxpacksize, packsize, position;
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char * tmpbuf=NULL, *packbuf=NULL;
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ptrdiff_t lb, sext, rext;
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int err = 0;
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int weallocated = 0;
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MPI_Datatype iddt;
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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,"coll:tuned:alltoall_intra_bruck rank %d", rank));
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err = ompi_ddt_get_extent (sdtype, &lb, &sext);
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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err = ompi_ddt_get_extent (rdtype, &lb, &rext);
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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#ifdef blahblah
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/* try and SAVE memory by using the data segment hung off the communicator if possible */
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if (comm->c_coll_selected_data->mcct_num_reqs >= size) {
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/* we have enought preallocated for displments and lengths */
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displs = (int*) comm->c_coll_basic_data->mcct_reqs;
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blen = (int *) (displs + size);
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weallocated = 0;
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}
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else { /* allocate the buffers ourself */
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#endif
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displs = (int *) malloc(size*sizeof(int));
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if (displs == NULL) { line = __LINE__; err = -1; goto err_hndl; }
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blen = (int *) malloc(size*sizeof(int));
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if (blen == NULL) { line = __LINE__; err = -1; goto err_hndl; }
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weallocated = 1;
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#ifdef blahblah
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}
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#endif
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/* Prepare for packing data */
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err = MPI_Pack_size( scount*size, sdtype, comm, &maxpacksize );
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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/* pack buffer allocation */
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packbuf = (char*) malloc((unsigned) maxpacksize);
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if (packbuf == NULL) { line = __LINE__; err = -1; goto err_hndl; }
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/* tmp buffer allocation for message data */
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tmpbuf = (char *) malloc(scount*size*sext);
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if (tmpbuf == NULL) { line = __LINE__; err = -1; goto err_hndl; }
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/* Step 1 - local rotation - shift up by rank */
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err = ompi_ddt_copy_content_same_ddt (sdtype, (int32_t) ((size-rank)*scount),
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tmpbuf, ((char*)sbuf)+rank*scount*sext);
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if (err<0) {
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line = __LINE__; err = -1; goto err_hndl;
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}
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if (rank != 0) {
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err = ompi_ddt_copy_content_same_ddt (sdtype, (int32_t) (rank*scount),
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tmpbuf+(size-rank)*scount*sext, (char*)sbuf);
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if (err<0) {
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line = __LINE__; err = -1; goto err_hndl;
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}
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}
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/* perform communication step */
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for (distance = 1; distance < size; distance<<=1) {
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/* send data to "sendto" */
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sendto = (rank+distance)%size;
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recvfrom = (rank-distance+size)%size;
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packsize = 0;
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k = 0;
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/* create indexed datatype */
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for (i = 1; i < size; i++) {
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if ((i&distance) == distance) {
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displs[k] = i*scount; blen[k] = scount;
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k++;
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}
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}
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/* Set indexes and displacements */
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err = MPI_Type_indexed(k, blen, displs, sdtype, &iddt);
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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/* Commit the new datatype */
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err = MPI_Type_commit(&iddt);
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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/* have the new distribution ddt, pack and exchange data */
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err = MPI_Pack(tmpbuf, 1, iddt, packbuf, maxpacksize, &packsize, comm);
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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/* Sendreceive */
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err = ompi_coll_tuned_sendrecv ( packbuf, packsize, MPI_PACKED, sendto,
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MCA_COLL_BASE_TAG_ALLTOALL,
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rbuf, packsize, MPI_PACKED, recvfrom,
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MCA_COLL_BASE_TAG_ALLTOALL,
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comm, MPI_STATUS_IGNORE, rank);
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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/* Unpack data from rbuf to tmpbuf */
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position = 0;
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err = MPI_Unpack(rbuf, packsize, &position,
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tmpbuf, 1, iddt, comm);
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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/* free ddt */
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err = MPI_Type_free(&iddt);
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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} /* end of for (distance = 1... */
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/* Step 3 - local rotation - */
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for (i = 0; i < size; i++) {
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err = ompi_ddt_copy_content_same_ddt (rdtype, (int32_t) rcount,
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((char*)rbuf)+(((rank-i+size)%size)*rcount*rext),
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tmpbuf+i*rcount*rext);
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if (err<0) {
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line = __LINE__; err = -1; goto err_hndl;
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}
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}
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/* Step 4 - clean up */
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if (tmpbuf != NULL) free(tmpbuf);
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if (packbuf != NULL) free(packbuf);
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if (weallocated) {
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if (displs != NULL) free(displs);
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if (blen != NULL) free(blen);
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}
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return OMPI_SUCCESS;
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err_hndl:
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OPAL_OUTPUT((ompi_coll_tuned_stream,"%s:%4d\tError occurred %d, rank %2d", __FILE__,line,err,rank));
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if (tmpbuf != NULL) free(tmpbuf);
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if (packbuf != NULL) free(packbuf);
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if (weallocated) {
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if (displs != NULL) free(displs);
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if (blen != NULL) free(blen);
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}
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return err;
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}
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int ompi_coll_tuned_alltoall_intra_two_procs(void *sbuf, int scount,
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struct ompi_datatype_t *sdtype,
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void* rbuf, int rcount,
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struct ompi_datatype_t *rdtype,
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struct ompi_communicator_t *comm)
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{
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int line = -1, err = 0;
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int rank;
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int sendto, recvfrom;
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void * tmpsend, *tmprecv;
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ptrdiff_t sext, rext, lb;
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rank = ompi_comm_rank(comm);
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OPAL_OUTPUT((ompi_coll_tuned_stream,"ompi_coll_tuned_alltoall_intra_two_procs rank %d", rank));
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err = ompi_ddt_get_extent (sdtype, &lb, &sext);
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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err = ompi_ddt_get_extent (rdtype, &lb, &rext);
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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/* exchange data */
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sendto = (rank+1)%2;
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recvfrom = sendto;
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/* where from are we sending and where to are we receiving ? */
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tmpsend = (char*)sbuf+sendto*sext*scount;
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tmprecv = (char*)rbuf+recvfrom*rext*rcount;
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/* send and receive */
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err = ompi_coll_tuned_sendrecv ( tmpsend, scount, sdtype, sendto, MCA_COLL_BASE_TAG_ALLTOALL,
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tmprecv, rcount, rdtype, recvfrom, MCA_COLL_BASE_TAG_ALLTOALL,
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comm, MPI_STATUS_IGNORE, rank );
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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/* ddt sendrecv your own data */
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err = ompi_ddt_sndrcv((char*) sbuf+rank*sext*scount, (int32_t) scount, sdtype,
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(char*) rbuf+rank*rext*rcount, (int32_t) rcount, rdtype);
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if (err != MPI_SUCCESS) { line = __LINE__; goto err_hndl; }
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/* done */
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return MPI_SUCCESS;
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err_hndl:
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OPAL_OUTPUT((ompi_coll_tuned_stream,"%s:%4d\tError occurred %d, rank %2d", __FILE__,line,err,rank));
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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
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* they do not segment the message and are simple implementations
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* but for some small number of nodes and/or small data sizes they
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* are just as fast as tuned/tree based segmenting operations
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* and as such may be selected by the decision functions
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* These are copied into this module due to the way we select modules
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* in V1. i.e. in V2 we will handle this differently and so will not
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* have to duplicate code.
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* GEF Oct05 after asking Jeff.
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*/
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/* copied function (with appropriate renaming) starts here */
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int ompi_coll_tuned_alltoall_intra_basic_linear(void *sbuf, int scount,
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struct ompi_datatype_t *sdtype,
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void* rbuf, int rcount,
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struct ompi_datatype_t *rdtype,
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struct ompi_communicator_t *comm)
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{
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int i;
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int rank;
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int size;
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int err;
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int nreqs;
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char *psnd;
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char *prcv;
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MPI_Aint lb;
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MPI_Aint sndinc;
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MPI_Aint rcvinc;
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ompi_request_t **req;
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ompi_request_t **sreq;
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ompi_request_t **rreq;
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/* Initialize. */
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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,"ompi_coll_tuned_alltoall_intra_basic_linear rank %d", rank));
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err = ompi_ddt_get_extent(sdtype, &lb, &sndinc);
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if (OMPI_SUCCESS != err) {
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return err;
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}
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sndinc *= scount;
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err = ompi_ddt_get_extent(rdtype, &lb, &rcvinc);
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if (OMPI_SUCCESS != err) {
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return err;
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}
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rcvinc *= rcount;
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/* simple optimization */
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psnd = ((char *) sbuf) + (rank * sndinc);
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prcv = ((char *) rbuf) + (rank * rcvinc);
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err = ompi_ddt_sndrcv(psnd, scount, sdtype, prcv, rcount, rdtype);
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if (MPI_SUCCESS != err) {
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return err;
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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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/* Initiate all send/recv to/from others. */
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req = rreq = comm->c_coll_basic_data->mcct_reqs;
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sreq = rreq + size - 1;
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prcv = (char *) rbuf;
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psnd = (char *) sbuf;
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/* Post all receives first -- a simple optimization */
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for (nreqs = 0, i = (rank + 1) % size; i != rank; i = (i + 1) % size, ++rreq, ++nreqs) {
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err =
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MCA_PML_CALL(irecv_init
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(prcv + (i * rcvinc), rcount, rdtype, i,
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MCA_COLL_BASE_TAG_ALLTOALL, comm, rreq));
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if (MPI_SUCCESS != err) {
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ompi_coll_tuned_free_reqs(req, rreq - req);
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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 (nreqs = 0, i = (rank + 1) % size; i != rank; i = (i + 1) % size, ++sreq, ++nreqs) {
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err =
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MCA_PML_CALL(isend_init
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(psnd + (i * sndinc), scount, sdtype, i,
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MCA_COLL_BASE_TAG_ALLTOALL,
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MCA_PML_BASE_SEND_STANDARD, comm, sreq));
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if (MPI_SUCCESS != err) {
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ompi_coll_tuned_free_reqs(req, sreq - req);
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return err;
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}
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}
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nreqs = (size - 1) * 2;
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/* Start your engines. This will never return an error. */
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MCA_PML_CALL(start(nreqs, req));
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/* Wait for them all. If there's an error, note that we don't
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* care what the error was -- just that there *was* an error. The
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* PML 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
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* the error after we free everything. */
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err = ompi_request_wait_all(nreqs, req, MPI_STATUSES_IGNORE);
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/* Free the reqs */
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ompi_coll_tuned_free_reqs(req, nreqs);
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/* All done */
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return err;
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}
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/* copied function (with appropriate renaming) ends here */
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/* The following are used by dynamic and forced rules */
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/* publish details of each algorithm and if its forced/fixed/locked in */
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/* as you add methods/algorithms you must update this and the query/map routines */
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/* this routine is called by the component only */
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/* this makes sure that 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 instead */
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int ompi_coll_tuned_alltoall_intra_check_forced_init (coll_tuned_force_algorithm_mca_param_indices_t *mca_param_indices)
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{
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int rc, max_alg = 4, requested_alg;
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ompi_coll_tuned_forced_max_algorithms[ALLTOALL] = max_alg;
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rc = mca_base_param_reg_int (&mca_coll_tuned_component.super.collm_version,
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"alltoall_algorithm_count",
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"Number of alltoall 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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"alltoall_algorithm",
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"Which alltoall algorithm is used. Can be locked down to choice of: 0 ignore, 1 basic linear, 2 pairwise, 3: modified bruck, 4: two proc only.",
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false, false, 0, NULL);
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mca_base_param_lookup_int(mca_param_indices->algorithm_param_index, &(requested_alg));
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if( requested_alg > max_alg ) {
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if( 0 == ompi_comm_rank( MPI_COMM_WORLD ) ) {
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opal_output( 0, "Alltoall algorithm #%d is not available (range [0..%d]). 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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mca_param_indices->segsize_param_index
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= mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version,
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"alltoall_algorithm_segmentsize",
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"Segment size in bytes used by default for alltoall algorithms. Only has meaning if algorithm is forced and supports segmenting. 0 bytes means no segmentation.",
|
|
false, false, 0, NULL);
|
|
|
|
mca_param_indices->tree_fanout_param_index
|
|
= mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version,
|
|
"alltoall_algorithm_tree_fanout",
|
|
"Fanout for n-tree used for alltoall algorithms. Only has meaning if algorithm is forced and supports n-tree topo based operation.",
|
|
false, false,
|
|
ompi_coll_tuned_init_tree_fanout, /* get system wide default */
|
|
NULL);
|
|
|
|
mca_param_indices->chain_fanout_param_index
|
|
= mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version,
|
|
"alltoall_algorithm_chain_fanout",
|
|
"Fanout for chains used for alltoall algorithms. Only has meaning if algorithm is forced and supports chain topo based operation.",
|
|
false, false,
|
|
ompi_coll_tuned_init_chain_fanout, /* get system wide default */
|
|
NULL);
|
|
|
|
return (MPI_SUCCESS);
|
|
}
|
|
|
|
|
|
|
|
int ompi_coll_tuned_alltoall_intra_do_forced(void *sbuf, int scount,
|
|
struct ompi_datatype_t *sdtype,
|
|
void* rbuf, int rcount,
|
|
struct ompi_datatype_t *rdtype,
|
|
struct ompi_communicator_t *comm)
|
|
{
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:alltoall_intra_do_forced selected algorithm %d",
|
|
comm->c_coll_selected_data->user_forced[ALLTOALL].algorithm));
|
|
|
|
switch (comm->c_coll_selected_data->user_forced[ALLTOALL].algorithm) {
|
|
case (0): return ompi_coll_tuned_alltoall_intra_dec_fixed (sbuf, scount, sdtype, rbuf, rcount, rdtype, comm);
|
|
case (1): return ompi_coll_tuned_alltoall_intra_basic_linear (sbuf, scount, sdtype, rbuf, rcount, rdtype, comm);
|
|
case (2): return ompi_coll_tuned_alltoall_intra_pairwise (sbuf, scount, sdtype, rbuf, rcount, rdtype, comm);
|
|
case (3): return ompi_coll_tuned_alltoall_intra_bruck (sbuf, scount, sdtype, rbuf, rcount, rdtype, comm);
|
|
case (4): return ompi_coll_tuned_alltoall_intra_two_procs (sbuf, scount, sdtype, rbuf, rcount, rdtype, comm);
|
|
default:
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:alltoall_intra_do_forced attempt to select algorithm %d when only 0-%d is valid?",
|
|
comm->c_coll_selected_data->user_forced[ALLTOALL].algorithm, ompi_coll_tuned_forced_max_algorithms[ALLTOALL]));
|
|
return (MPI_ERR_ARG);
|
|
} /* switch */
|
|
|
|
}
|
|
|
|
|
|
int ompi_coll_tuned_alltoall_intra_do_this(void *sbuf, int scount,
|
|
struct ompi_datatype_t *sdtype,
|
|
void* rbuf, int rcount,
|
|
struct ompi_datatype_t *rdtype,
|
|
struct ompi_communicator_t *comm,
|
|
int algorithm, int faninout, int segsize)
|
|
{
|
|
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:alltoall_intra_do_this selected algorithm %d topo faninout %d segsize %d",
|
|
algorithm, faninout, segsize));
|
|
|
|
switch (algorithm) {
|
|
case (0): return ompi_coll_tuned_alltoall_intra_dec_fixed (sbuf, scount, sdtype, rbuf, rcount, rdtype, comm);
|
|
case (1): return ompi_coll_tuned_alltoall_intra_basic_linear (sbuf, scount, sdtype, rbuf, rcount, rdtype, comm);
|
|
case (2): return ompi_coll_tuned_alltoall_intra_pairwise (sbuf, scount, sdtype, rbuf, rcount, rdtype, comm);
|
|
case (3): return ompi_coll_tuned_alltoall_intra_bruck (sbuf, scount, sdtype, rbuf, rcount, rdtype, comm);
|
|
case (4): return ompi_coll_tuned_alltoall_intra_two_procs (sbuf, scount, sdtype, rbuf, rcount, rdtype, comm);
|
|
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[ALLTOALL]));
|
|
return (MPI_ERR_ARG);
|
|
} /* switch */
|
|
|
|
}
|
|
|