338 строки
11 KiB
C
338 строки
11 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
|
|
/*
|
|
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
|
|
* University Research and Technology
|
|
* Corporation. All rights reserved.
|
|
* Copyright (c) 2004-2005 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) 2013 Los Alamos National Security, LLC. All rights
|
|
* reserved.
|
|
* Copyright (c) 2014 Research Organization for Information Science
|
|
* and Technology (RIST). All rights reserved.
|
|
* $COPYRIGHT$
|
|
*
|
|
* Additional copyrights may follow
|
|
*
|
|
* $HEADER$
|
|
*/
|
|
|
|
#include "ompi_config.h"
|
|
#include "coll_basic.h"
|
|
|
|
#include "mpi.h"
|
|
#include "ompi/constants.h"
|
|
#include "ompi/datatype/ompi_datatype.h"
|
|
#include "ompi/mca/coll/coll.h"
|
|
#include "ompi/mca/coll/base/coll_tags.h"
|
|
#include "ompi/mca/pml/pml.h"
|
|
|
|
|
|
static int
|
|
mca_coll_basic_alltoall_intra_inplace(void *rbuf, int rcount,
|
|
struct ompi_datatype_t *rdtype,
|
|
struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module)
|
|
{
|
|
mca_coll_basic_module_t *basic_module = (mca_coll_basic_module_t*) module;
|
|
int i, j, size, rank, err=MPI_SUCCESS;
|
|
MPI_Request *preq;
|
|
char *tmp_buffer;
|
|
size_t max_size;
|
|
ptrdiff_t ext;
|
|
|
|
/* Initialize. */
|
|
|
|
size = ompi_comm_size(comm);
|
|
rank = ompi_comm_rank(comm);
|
|
|
|
/* If only one process, we're done. */
|
|
if (1 == size) {
|
|
return MPI_SUCCESS;
|
|
}
|
|
|
|
/* Find the largest receive amount */
|
|
ompi_datatype_type_extent (rdtype, &ext);
|
|
max_size = ext * rcount;
|
|
|
|
/* Allocate a temporary buffer */
|
|
tmp_buffer = calloc (max_size, 1);
|
|
if (NULL == tmp_buffer) {
|
|
return OMPI_ERR_OUT_OF_RESOURCE;
|
|
}
|
|
|
|
/* in-place alltoall slow algorithm (but works) */
|
|
for (i = 0 ; i < size ; ++i) {
|
|
for (j = i+1 ; j < size ; ++j) {
|
|
/* Initiate all send/recv to/from others. */
|
|
preq = basic_module->mccb_reqs;
|
|
|
|
if (i == rank) {
|
|
/* Copy the data into the temporary buffer */
|
|
err = ompi_datatype_copy_content_same_ddt (rdtype, rcount, tmp_buffer,
|
|
(char *) rbuf + j * max_size);
|
|
if (MPI_SUCCESS != err) { goto error_hndl; }
|
|
|
|
/* Exchange data with the peer */
|
|
err = MCA_PML_CALL(irecv ((char *) rbuf + max_size * j, rcount, rdtype,
|
|
j, MCA_COLL_BASE_TAG_ALLTOALL, comm, preq++));
|
|
if (MPI_SUCCESS != err) { goto error_hndl; }
|
|
|
|
err = MCA_PML_CALL(isend ((char *) tmp_buffer, rcount, rdtype,
|
|
j, MCA_COLL_BASE_TAG_ALLTOALL, MCA_PML_BASE_SEND_STANDARD,
|
|
comm, preq++));
|
|
if (MPI_SUCCESS != err) { goto error_hndl; }
|
|
} else if (j == rank) {
|
|
/* Copy the data into the temporary buffer */
|
|
err = ompi_datatype_copy_content_same_ddt (rdtype, rcount, tmp_buffer,
|
|
(char *) rbuf + i * max_size);
|
|
if (MPI_SUCCESS != err) { goto error_hndl; }
|
|
|
|
/* Exchange data with the peer */
|
|
err = MCA_PML_CALL(irecv ((char *) rbuf + max_size * i, rcount, rdtype,
|
|
i, MCA_COLL_BASE_TAG_ALLTOALL, comm, preq++));
|
|
if (MPI_SUCCESS != err) { goto error_hndl; }
|
|
|
|
err = MCA_PML_CALL(isend ((char *) tmp_buffer, rcount, rdtype,
|
|
i, MCA_COLL_BASE_TAG_ALLTOALL, MCA_PML_BASE_SEND_STANDARD,
|
|
comm, preq++));
|
|
if (MPI_SUCCESS != err) { goto error_hndl; }
|
|
} else {
|
|
continue;
|
|
}
|
|
|
|
/* Wait for the requests to complete */
|
|
err = ompi_request_wait_all (2, basic_module->mccb_reqs, MPI_STATUSES_IGNORE);
|
|
if (MPI_SUCCESS != err) { goto error_hndl; }
|
|
|
|
/* Free the requests. */
|
|
mca_coll_basic_free_reqs(basic_module->mccb_reqs, 2);
|
|
}
|
|
}
|
|
|
|
error_hndl:
|
|
/* Free the temporary buffer */
|
|
free (tmp_buffer);
|
|
|
|
/* All done */
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* alltoall_intra
|
|
*
|
|
* Function: - MPI_Alltoall
|
|
* Accepts: - same as MPI_Alltoall()
|
|
* Returns: - MPI_SUCCESS or an MPI error code
|
|
*/
|
|
int
|
|
mca_coll_basic_alltoall_intra(void *sbuf, int scount,
|
|
struct ompi_datatype_t *sdtype,
|
|
void *rbuf, int rcount,
|
|
struct ompi_datatype_t *rdtype,
|
|
struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module)
|
|
{
|
|
int i;
|
|
int rank;
|
|
int size;
|
|
int err;
|
|
int nreqs;
|
|
char *psnd;
|
|
char *prcv;
|
|
MPI_Aint lb;
|
|
MPI_Aint sndinc;
|
|
MPI_Aint rcvinc;
|
|
|
|
ompi_request_t **req;
|
|
ompi_request_t **sreq;
|
|
ompi_request_t **rreq;
|
|
mca_coll_basic_module_t *basic_module = (mca_coll_basic_module_t*) module;
|
|
|
|
/* Initialize. */
|
|
if (MPI_IN_PLACE == sbuf) {
|
|
return mca_coll_basic_alltoall_intra_inplace (rbuf, rcount, rdtype,
|
|
comm, module);
|
|
}
|
|
|
|
size = ompi_comm_size(comm);
|
|
rank = ompi_comm_rank(comm);
|
|
|
|
err = ompi_datatype_get_extent(sdtype, &lb, &sndinc);
|
|
if (OMPI_SUCCESS != err) {
|
|
return err;
|
|
}
|
|
sndinc *= scount;
|
|
|
|
err = ompi_datatype_get_extent(rdtype, &lb, &rcvinc);
|
|
if (OMPI_SUCCESS != err) {
|
|
return err;
|
|
}
|
|
rcvinc *= rcount;
|
|
|
|
/* simple optimization */
|
|
|
|
psnd = ((char *) sbuf) + (rank * sndinc);
|
|
prcv = ((char *) rbuf) + (rank * rcvinc);
|
|
|
|
err = ompi_datatype_sndrcv(psnd, scount, sdtype, prcv, rcount, rdtype);
|
|
if (MPI_SUCCESS != err) {
|
|
return err;
|
|
}
|
|
|
|
/* If only one process, we're done. */
|
|
|
|
if (1 == size) {
|
|
return MPI_SUCCESS;
|
|
}
|
|
|
|
/* Initiate all send/recv to/from others. */
|
|
|
|
req = rreq = basic_module->mccb_reqs;
|
|
sreq = rreq + size - 1;
|
|
|
|
prcv = (char *) rbuf;
|
|
psnd = (char *) sbuf;
|
|
|
|
/* Post all receives first -- a simple optimization */
|
|
|
|
for (nreqs = 0, i = (rank + 1) % size; i != rank; i = (i + 1) % size, ++rreq, ++nreqs) {
|
|
err =
|
|
MCA_PML_CALL(irecv_init
|
|
(prcv + (i * rcvinc), rcount, rdtype, i,
|
|
MCA_COLL_BASE_TAG_ALLTOALL, comm, rreq));
|
|
if (MPI_SUCCESS != err) {
|
|
mca_coll_basic_free_reqs(req, nreqs);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
/* Now post all sends */
|
|
|
|
for (nreqs = 0, i = (rank + 1) % size; i != rank; i = (i + 1) % size, ++sreq, ++nreqs) {
|
|
err =
|
|
MCA_PML_CALL(isend_init
|
|
(psnd + (i * sndinc), scount, sdtype, i,
|
|
MCA_COLL_BASE_TAG_ALLTOALL,
|
|
MCA_PML_BASE_SEND_STANDARD, comm, sreq));
|
|
if (MPI_SUCCESS != err) {
|
|
mca_coll_basic_free_reqs(req, nreqs);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
nreqs = (size - 1) * 2;
|
|
/* Start your engines. This will never return an error. */
|
|
|
|
MCA_PML_CALL(start(nreqs, req));
|
|
|
|
/* 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, req, MPI_STATUSES_IGNORE);
|
|
|
|
/* Free the reqs */
|
|
|
|
mca_coll_basic_free_reqs(req, nreqs);
|
|
|
|
/* All done */
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
* alltoall_inter
|
|
*
|
|
* Function: - MPI_Alltoall
|
|
* Accepts: - same as MPI_Alltoall()
|
|
* Returns: - MPI_SUCCESS or an MPI error code
|
|
*/
|
|
int
|
|
mca_coll_basic_alltoall_inter(void *sbuf, int scount,
|
|
struct ompi_datatype_t *sdtype,
|
|
void *rbuf, int rcount,
|
|
struct ompi_datatype_t *rdtype,
|
|
struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module)
|
|
{
|
|
int i;
|
|
int size;
|
|
int err;
|
|
int nreqs;
|
|
char *psnd;
|
|
char *prcv;
|
|
MPI_Aint lb;
|
|
MPI_Aint sndinc;
|
|
MPI_Aint rcvinc;
|
|
|
|
ompi_request_t **req;
|
|
ompi_request_t **sreq;
|
|
ompi_request_t **rreq;
|
|
|
|
mca_coll_basic_module_t *basic_module = (mca_coll_basic_module_t*) module;
|
|
|
|
/* Initialize. */
|
|
|
|
size = ompi_comm_remote_size(comm);
|
|
|
|
err = ompi_datatype_get_extent(sdtype, &lb, &sndinc);
|
|
if (OMPI_SUCCESS != err) {
|
|
return err;
|
|
}
|
|
sndinc *= scount;
|
|
|
|
err = ompi_datatype_get_extent(rdtype, &lb, &rcvinc);
|
|
if (OMPI_SUCCESS != err) {
|
|
return err;
|
|
}
|
|
rcvinc *= rcount;
|
|
|
|
/* Initiate all send/recv to/from others. */
|
|
nreqs = size * 2;
|
|
req = rreq = basic_module->mccb_reqs;
|
|
sreq = rreq + size;
|
|
|
|
prcv = (char *) rbuf;
|
|
psnd = (char *) sbuf;
|
|
|
|
/* Post all receives first */
|
|
for (i = 0; i < size; i++, ++rreq) {
|
|
err = MCA_PML_CALL(irecv(prcv + (i * rcvinc), rcount, rdtype, i,
|
|
MCA_COLL_BASE_TAG_ALLTOALL, comm, rreq));
|
|
if (OMPI_SUCCESS != err) {
|
|
return err;
|
|
}
|
|
}
|
|
|
|
/* Now post all sends */
|
|
for (i = 0; i < size; i++, ++sreq) {
|
|
err = MCA_PML_CALL(isend(psnd + (i * sndinc), scount, sdtype, i,
|
|
MCA_COLL_BASE_TAG_ALLTOALL,
|
|
MCA_PML_BASE_SEND_STANDARD, comm, sreq));
|
|
if (OMPI_SUCCESS != err) {
|
|
return err;
|
|
}
|
|
}
|
|
|
|
/* 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, req, MPI_STATUSES_IGNORE);
|
|
|
|
/* All done */
|
|
return err;
|
|
}
|