88492a1e12
in the base). Correctly deal with persistent requests (they must be always freed when they are stored in the request array associated with the communicator). Always use MPI_STATUS_IGNORE for single request waiting functions.
211 строки
8.1 KiB
C
211 строки
8.1 KiB
C
/*
|
|
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
|
|
* University Research and Technology
|
|
* Corporation. All rights reserved.
|
|
* Copyright (c) 2004-2015 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) 2015 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/op/op.h"
|
|
#include "ompi/mca/coll/coll.h"
|
|
#include "ompi/mca/coll/base/coll_tags.h"
|
|
#include "coll_basic.h"
|
|
#include "ompi/mca/pml/pml.h"
|
|
|
|
|
|
/*
|
|
* allreduce_intra
|
|
*
|
|
* Function: - allreduce using other MPI collectives
|
|
* Accepts: - same as MPI_Allreduce()
|
|
* Returns: - MPI_SUCCESS or error code
|
|
*/
|
|
int
|
|
mca_coll_basic_allreduce_intra(const void *sbuf, void *rbuf, int count,
|
|
struct ompi_datatype_t *dtype,
|
|
struct ompi_op_t *op,
|
|
struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module)
|
|
{
|
|
int err;
|
|
|
|
/* Reduce to 0 and broadcast. */
|
|
|
|
if (MPI_IN_PLACE == sbuf) {
|
|
if (0 == ompi_comm_rank(comm)) {
|
|
err = comm->c_coll.coll_reduce(MPI_IN_PLACE, rbuf, count, dtype, op, 0, comm, comm->c_coll.coll_reduce_module);
|
|
} else {
|
|
err = comm->c_coll.coll_reduce(rbuf, NULL, count, dtype, op, 0, comm, comm->c_coll.coll_reduce_module);
|
|
}
|
|
} else {
|
|
err = comm->c_coll.coll_reduce(sbuf, rbuf, count, dtype, op, 0, comm, comm->c_coll.coll_reduce_module);
|
|
}
|
|
if (MPI_SUCCESS != err) {
|
|
return err;
|
|
}
|
|
|
|
return comm->c_coll.coll_bcast(rbuf, count, dtype, 0, comm, comm->c_coll.coll_bcast_module);
|
|
}
|
|
|
|
|
|
/*
|
|
* allreduce_inter
|
|
*
|
|
* Function: - allreduce using other MPI collectives
|
|
* Accepts: - same as MPI_Allreduce()
|
|
* Returns: - MPI_SUCCESS or error code
|
|
*/
|
|
int
|
|
mca_coll_basic_allreduce_inter(const void *sbuf, void *rbuf, int count,
|
|
struct ompi_datatype_t *dtype,
|
|
struct ompi_op_t *op,
|
|
struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module)
|
|
{
|
|
int err, i, rank, root = 0, rsize, line;
|
|
ptrdiff_t lb, extent;
|
|
ptrdiff_t true_lb, true_extent;
|
|
char *tmpbuf = NULL, *pml_buffer = NULL;
|
|
ompi_request_t *req[2];
|
|
ompi_request_t **reqs = NULL;
|
|
|
|
rank = ompi_comm_rank(comm);
|
|
rsize = ompi_comm_remote_size(comm);
|
|
|
|
/* determine result of the remote group, you cannot
|
|
* use coll_reduce for inter-communicators, since than
|
|
* you would need to determine an order between the
|
|
* two groups (e.g. which group is providing the data
|
|
* and which one enters coll_reduce with providing
|
|
* MPI_PROC_NULL as root argument etc.) Here,
|
|
* we execute the data exchange for both groups
|
|
* simultaniously. */
|
|
/*****************************************************************/
|
|
if (rank == root) {
|
|
err = ompi_datatype_get_extent(dtype, &lb, &extent);
|
|
if (OMPI_SUCCESS != err) {
|
|
return OMPI_ERROR;
|
|
}
|
|
err = ompi_datatype_get_true_extent(dtype, &true_lb, &true_extent);
|
|
if (OMPI_SUCCESS != err) {
|
|
return OMPI_ERROR;
|
|
}
|
|
|
|
tmpbuf = (char *) malloc(true_extent + (count - 1) * extent);
|
|
if (NULL == tmpbuf) { err = OMPI_ERR_OUT_OF_RESOURCE; line = __LINE__; goto exit; }
|
|
pml_buffer = tmpbuf - true_lb;
|
|
|
|
reqs = coll_base_comm_get_reqs(module->base_data, rsize - 1);
|
|
if( NULL == reqs ) { err = OMPI_ERR_OUT_OF_RESOURCE; line = __LINE__; goto exit; }
|
|
|
|
/* Do a send-recv between the two root procs. to avoid deadlock */
|
|
err = MCA_PML_CALL(irecv(rbuf, count, dtype, 0,
|
|
MCA_COLL_BASE_TAG_ALLREDUCE, comm,
|
|
&(req[0])));
|
|
if (OMPI_SUCCESS != err) { line = __LINE__; goto exit; }
|
|
|
|
err = MCA_PML_CALL(isend(sbuf, count, dtype, 0,
|
|
MCA_COLL_BASE_TAG_ALLREDUCE,
|
|
MCA_PML_BASE_SEND_STANDARD,
|
|
comm, &(req[1])));
|
|
if (OMPI_SUCCESS != err) { line = __LINE__; goto exit; }
|
|
|
|
err = ompi_request_wait_all(2, req, MPI_STATUSES_IGNORE);
|
|
if (OMPI_SUCCESS != err) { line = __LINE__; goto exit; }
|
|
|
|
/* Loop receiving and calling reduction function (C or Fortran). */
|
|
for (i = 1; i < rsize; i++) {
|
|
err = MCA_PML_CALL(recv(pml_buffer, count, dtype, i,
|
|
MCA_COLL_BASE_TAG_ALLREDUCE, comm,
|
|
MPI_STATUS_IGNORE));
|
|
if (OMPI_SUCCESS != err) { line = __LINE__; goto exit; }
|
|
|
|
/* Perform the reduction */
|
|
ompi_op_reduce(op, pml_buffer, rbuf, count, dtype);
|
|
}
|
|
} else {
|
|
/* If not root, send data to the root. */
|
|
err = MCA_PML_CALL(send(sbuf, count, dtype, root,
|
|
MCA_COLL_BASE_TAG_ALLREDUCE,
|
|
MCA_PML_BASE_SEND_STANDARD, comm));
|
|
if (OMPI_SUCCESS != err) { line = __LINE__; goto exit; }
|
|
}
|
|
|
|
|
|
/* now we have on one process the result of the remote group. To distribute
|
|
* the data to all processes in the local group, we exchange the data between
|
|
* the two root processes. They then send it to every other process in the
|
|
* remote group. */
|
|
/***************************************************************************/
|
|
if (rank == root) {
|
|
/* sendrecv between the two roots */
|
|
err = MCA_PML_CALL(irecv(pml_buffer, count, dtype, 0,
|
|
MCA_COLL_BASE_TAG_ALLREDUCE,
|
|
comm, &(req[1])));
|
|
if (OMPI_SUCCESS != err) { line = __LINE__; goto exit; }
|
|
|
|
err = MCA_PML_CALL(isend(rbuf, count, dtype, 0,
|
|
MCA_COLL_BASE_TAG_ALLREDUCE,
|
|
MCA_PML_BASE_SEND_STANDARD, comm,
|
|
&(req[0])));
|
|
if (OMPI_SUCCESS != err) { line = __LINE__; goto exit; }
|
|
|
|
err = ompi_request_wait_all(2, req, MPI_STATUSES_IGNORE);
|
|
if (OMPI_SUCCESS != err) { line = __LINE__; goto exit; }
|
|
|
|
/* distribute the data to other processes in remote group.
|
|
* Note that we start from 1 (not from zero), since zero
|
|
* has already the correct data AND we avoid a potential
|
|
* deadlock here.
|
|
*/
|
|
if (rsize > 1) {
|
|
for (i = 1; i < rsize; i++) {
|
|
err = MCA_PML_CALL(isend(pml_buffer, count, dtype, i,
|
|
MCA_COLL_BASE_TAG_ALLREDUCE,
|
|
MCA_PML_BASE_SEND_STANDARD, comm,
|
|
&reqs[i - 1]));
|
|
if (OMPI_SUCCESS != err) { line = __LINE__; goto exit; }
|
|
}
|
|
|
|
err =
|
|
ompi_request_wait_all(rsize - 1, reqs,
|
|
MPI_STATUSES_IGNORE);
|
|
if (OMPI_SUCCESS != err) { line = __LINE__; goto exit; }
|
|
}
|
|
} else {
|
|
err = MCA_PML_CALL(recv(rbuf, count, dtype, root,
|
|
MCA_COLL_BASE_TAG_ALLREDUCE,
|
|
comm, MPI_STATUS_IGNORE));
|
|
}
|
|
|
|
exit:
|
|
if( MPI_SUCCESS != err ) {
|
|
OPAL_OUTPUT((ompi_coll_base_framework.framework_output,"%s:%4d\tError occurred %d, rank %2d", __FILE__,
|
|
line, err, rank));
|
|
ompi_coll_base_free_reqs(reqs, rsize - 1);
|
|
}
|
|
if (NULL != tmpbuf) {
|
|
free(tmpbuf);
|
|
}
|
|
|
|
return err;
|
|
}
|