a5a712b31f
real commit of the collectives. MPI_SCAN and MPI_EXSCAN are still not implemented, but lots of other things are in the critical path and holding up other people, so it's ok to commit without them: - better checks for sizes in configure, and add defaults for fortran sizes if we don't have a fortran compiler - fix some logic that was accidentally broken for size checks for the file type offset_t - add some C equivalent types for fortran's complex and double complex (for use in internal reduction/op functions) - additionals and slight reorganization of ompi_mpi_init() ompi_mpi_finalize() - fully implement all top-level MPI collective calls, including all param checking for both intra- and inter-communicators (woof) - change the communicator_t type for stuff that we need in coll, and update all references throughout the code base to match - all kinds of updates to the coll framework base - next cut of the basic coll module -- has all intracommunicator collectives implemented except scan and exscan (see note above). All intercommunicator functions return ERR_NOT_IMPLEMENTED. - MPI_Op is a fixed implementation -- not component-ized yet. So there are generic C loops for all implementations. This commit was SVN r1491.
75 строки
2.1 KiB
C
75 строки
2.1 KiB
C
/*
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* $HEADERS$
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*/
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#include "ompi_config.h"
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#include <stdio.h>
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#include "mpi.h"
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#include "mpi/c/bindings.h"
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#include "mca/coll/coll.h"
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#include "errhandler/errhandler.h"
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#include "communicator/communicator.h"
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#include "op/op.h"
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#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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#pragma weak MPI_Reduce_scatter = PMPI_Reduce_scatter
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#endif
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#if OMPI_PROFILING_DEFINES
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#include "mpi/c/profile/defines.h"
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#endif
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static char FUNC_NAME[] = "MPI_Reduce_scatter";
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int MPI_Reduce_scatter(void *sendbuf, void *recvbuf, int *recvcounts,
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MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
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{
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int i, err, size;
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if (MPI_PARAM_CHECK) {
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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if (ompi_comm_invalid(comm)) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM,
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FUNC_NAME);
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}
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/* Unrooted operation; same checks for all ranks on both
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intracommunicators and intercommunicators */
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if (MPI_DATATYPE_NULL == datatype) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_TYPE, FUNC_NAME);
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}
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if (MPI_OP_NULL == op) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_OP, FUNC_NAME);
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}
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if (ompi_op_is_intrinsic(op) && datatype->id < DT_MAX_PREDEFINED &&
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-1 == ompi_op_ddt_map[datatype->id]) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_OP, FUNC_NAME);
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}
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if (NULL == recvcounts) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_COUNT, FUNC_NAME);
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}
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if (OMPI_COMM_IS_INTRA(comm)) {
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size = ompi_comm_size(comm);
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} else {
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size = ompi_comm_remote_size(comm);
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}
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for (i = 0; i < size; ++i) {
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if (recvcounts[i] < 0) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_COUNT, FUNC_NAME);
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}
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}
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}
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/* Invoke the coll component to perform the back-end operation */
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err = comm->c_coll.coll_reduce_scatter(sendbuf, recvbuf, recvcounts,
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datatype, op, comm);
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OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
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}
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