88 строки
2.8 KiB
C
88 строки
2.8 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.
|
|
* $COPYRIGHT$
|
|
*
|
|
* 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"
|
|
#include "coll_basic.h"
|
|
|
|
|
|
/*
|
|
* scatter_inter
|
|
*
|
|
* Function: - scatter operation
|
|
* Accepts: - same arguments as MPI_Scatter()
|
|
* Returns: - MPI_SUCCESS or error code
|
|
*/
|
|
int
|
|
mca_coll_basic_scatter_inter(void *sbuf, int scount,
|
|
struct ompi_datatype_t *sdtype,
|
|
void *rbuf, int rcount,
|
|
struct ompi_datatype_t *rdtype,
|
|
int root, struct ompi_communicator_t *comm,
|
|
mca_coll_base_module_t *module)
|
|
{
|
|
int i, size, err;
|
|
char *ptmp;
|
|
ptrdiff_t lb, incr;
|
|
mca_coll_basic_module_t *basic_module = (mca_coll_basic_module_t*) module;
|
|
ompi_request_t **reqs = basic_module->mccb_reqs;
|
|
|
|
/* Initialize */
|
|
size = ompi_comm_remote_size(comm);
|
|
|
|
if (MPI_PROC_NULL == root) {
|
|
/* do nothing */
|
|
err = OMPI_SUCCESS;
|
|
} else if (MPI_ROOT != root) {
|
|
/* If not root, receive data. */
|
|
err = MCA_PML_CALL(recv(rbuf, rcount, rdtype, root,
|
|
MCA_COLL_BASE_TAG_SCATTER,
|
|
comm, MPI_STATUS_IGNORE));
|
|
} else {
|
|
/* I am the root, loop sending data. */
|
|
err = ompi_datatype_get_extent(sdtype, &lb, &incr);
|
|
if (OMPI_SUCCESS != err) {
|
|
return OMPI_ERROR;
|
|
}
|
|
|
|
incr *= scount;
|
|
for (i = 0, ptmp = (char *) sbuf; i < size; ++i, ptmp += incr) {
|
|
err = MCA_PML_CALL(isend(ptmp, scount, sdtype, i,
|
|
MCA_COLL_BASE_TAG_SCATTER,
|
|
MCA_PML_BASE_SEND_STANDARD, comm,
|
|
reqs++));
|
|
if (OMPI_SUCCESS != err) {
|
|
return err;
|
|
}
|
|
}
|
|
|
|
err =
|
|
ompi_request_wait_all(size, basic_module->mccb_reqs,
|
|
MPI_STATUSES_IGNORE);
|
|
}
|
|
|
|
return err;
|
|
}
|