6c5532072a
OMPI and a language agnostic part in OPAL. The convertor is completely moved into OPAL. This offers several benefits as described in RFC http://www.open-mpi.org/community/lists/devel/2009/07/6387.php namely: - Fewer basic types (int* and float* types, boolean and wchar - Fixing naming scheme to ompi-nomenclature. - Usability outside of the ompi-layer. - Due to the fixed nature of simple opal types, their information is completely known at compile time and therefore constified - With fewer datatypes (22), the actual sizes of bit-field types may be reduced from 64 to 32 bits, allowing reorganizing the opal_datatype structure, eliminating holes and keeping data required in convertor (upon send/recv) in one cacheline... This has implications to the convertor-datastructure and other parts of the code. - Several performance tests have been run, the netpipe latency does not change with this patch on Linux/x86-64 on the smoky cluster. - Extensive tests have been done to verify correctness (no new regressions) using: 1. mpi_test_suite on linux/x86-64 using clean ompi-trunk and ompi-ddt: a. running both trunk and ompi-ddt resulted in no differences (except for MPI_SHORT_INT and MPI_TYPE_MIX_LB_UB do now run correctly). b. with --enable-memchecker and running under valgrind (one buglet when run with static found in test-suite, commited) 2. ibm testsuite on linux/x86-64 using clean ompi-trunk and ompi-ddt: all passed (except for the dynamic/ tests failed!! as trunk/MTT) 3. compilation and usage of HDF5 tests on Jaguar using PGI and PathScale compilers. 4. compilation and usage on Scicortex. - Please note, that for the heterogeneous case, (-m32 compiled binaries/ompi), neither ompi-trunk, nor ompi-ddt branch would successfully launch. This commit was SVN r21641.
99 строки
3.0 KiB
C
99 строки
3.0 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) 2004-2005 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 (c) 2006-2008 University of Houston. 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 "coll_inter.h"
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#include "mpi.h"
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#include "ompi/constants.h"
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#include "ompi/datatype/ompi_datatype.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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/*
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* scatter_inter
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*
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* Function: - scatter operation
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* Accepts: - same arguments as MPI_Scatter()
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* Returns: - MPI_SUCCESS or error code
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*/
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int
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mca_coll_inter_scatter_inter(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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int root, struct ompi_communicator_t *comm,
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mca_coll_base_module_t *module)
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{
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int rank, size, size_local, err;
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char *ptmp = NULL;
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ptrdiff_t lb, incr;
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/* Initialize */
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rank = ompi_comm_rank(comm);
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size = ompi_comm_remote_size(comm);
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if (MPI_PROC_NULL == root) {
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/* do nothing */
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err = OMPI_SUCCESS;
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} else if (MPI_ROOT != root) {
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/* First process receives the data from root */
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if(0 == rank) {
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err = ompi_datatype_get_extent(rdtype, &lb, &incr);
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if (OMPI_SUCCESS != err) {
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return OMPI_ERROR;
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}
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incr *= rcount;
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size_local = ompi_comm_size(comm->c_local_comm);
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ptmp = (char*)malloc(size_local * incr);
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if (NULL == ptmp) {
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return OMPI_ERR_OUT_OF_RESOURCE;
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}
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err = MCA_PML_CALL(recv(ptmp, rcount*size_local, rdtype,
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root, MCA_COLL_BASE_TAG_SCATTER,
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comm, MPI_STATUS_IGNORE));
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if (OMPI_SUCCESS != err) {
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return err;
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}
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}
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/* Perform the scatter locally with the first process as root */
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err = comm->c_local_comm->c_coll.coll_scatter(ptmp, rcount, rdtype,
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rbuf, rcount, rdtype,
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0, comm->c_local_comm,
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comm->c_local_comm->c_coll.coll_scatter_module);
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if (NULL != ptmp) {
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free(ptmp);
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}
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} else {
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/* Root sends data to the first process in the remote group */
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err = MCA_PML_CALL(send(sbuf, scount*size, sdtype, 0,
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MCA_COLL_BASE_TAG_SCATTER,
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MCA_PML_BASE_SEND_STANDARD, comm));
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if (OMPI_SUCCESS != err) {
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return err;
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}
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}
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return err;
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}
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