d377a6b6f4
This code is the implementation of Software-base Performance Counters as described in the paper 'Using Software-Base Performance Counters to Expose Low-Level Open MPI Performance Information' in EuroMPI/USA '17 (http://icl.cs.utk.edu/news_pub/submissions/software-performance-counters.pdf). More practical usage information can be found here: https://github.com/davideberius/ompi/wiki/How-to-Use-Software-Based-Performance-Counters-(SPCs)-in-Open-MPI. All software events functions are put in macros that become no-ops when SOFTWARE_EVENTS_ENABLE is not defined. The internal timer units have been changed to cycles to avoid division operations which was a large source of overhead as discussed in the paper. Added a --with-spc configure option to enable SPCs in the Open MPI build. This defines SOFTWARE_EVENTS_ENABLE. Added an MCA parameter, mpi_spc_enable, for turning on specific counters. Added an MCA parameter, mpi_spc_dump_enabled, for turning on and off dumping SPC counters in MPI_Finalize. Added an SPC test and example. Signed-off-by: David Eberius <deberius@vols.utk.edu>
92 строки
2.8 KiB
C
92 строки
2.8 KiB
C
/*
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* Copyright (c) 2004-2007 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) 2004-2018 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) 2004-2008 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) 2015 Research Organization for Information Science
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* and Technology (RIST). 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 <stdio.h>
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#include "ompi/mpi/c/bindings.h"
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#include "ompi/runtime/params.h"
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#include "ompi/communicator/communicator.h"
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#include "ompi/errhandler/errhandler.h"
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#include "ompi/mca/pml/pml.h"
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#include "ompi/memchecker.h"
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#include "ompi/request/request.h"
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#include "ompi/runtime/ompi_spc.h"
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#if OMPI_BUILD_MPI_PROFILING
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#if OPAL_HAVE_WEAK_SYMBOLS
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#pragma weak MPI_Probe = PMPI_Probe
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#endif
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#define MPI_Probe PMPI_Probe
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#endif
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static const char FUNC_NAME[] = "MPI_Probe";
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int MPI_Probe(int source, int tag, MPI_Comm comm, MPI_Status *status)
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{
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int rc;
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SPC_RECORD(OMPI_SPC_PROBE, 1);
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MEMCHECKER(
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memchecker_comm(comm);
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);
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if ( MPI_PARAM_CHECK ) {
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rc = MPI_SUCCESS;
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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if (((tag < 0) && (tag != MPI_ANY_TAG)) || (tag > mca_pml.pml_max_tag)) {
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rc = MPI_ERR_TAG;
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} else if (ompi_comm_invalid(comm)) {
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rc = MPI_ERR_COMM;
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} else if ((source != MPI_ANY_SOURCE) &&
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(MPI_PROC_NULL != source) &&
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ompi_comm_peer_invalid(comm, source)) {
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rc = MPI_ERR_RANK;
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}
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OMPI_ERRHANDLER_CHECK(rc, comm, rc, "MPI_Probe");
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}
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if (MPI_PROC_NULL == source) {
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if (MPI_STATUS_IGNORE != status) {
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*status = ompi_request_empty.req_status;
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/*
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* Per MPI-1, the MPI_ERROR field is not defined for single-completion calls
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*/
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MEMCHECKER(
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opal_memchecker_base_mem_undefined(&status->MPI_ERROR, sizeof(int));
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);
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}
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return MPI_SUCCESS;
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}
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OPAL_CR_ENTER_LIBRARY();
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rc = MCA_PML_CALL(probe(source, tag, comm, status));
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/*
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* Per MPI-1, the MPI_ERROR field is not defined for single-completion calls
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*/
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MEMCHECKER(
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opal_memchecker_base_mem_undefined(&status->MPI_ERROR, sizeof(int));
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);
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OMPI_ERRHANDLER_RETURN(rc, comm, rc, "MPI_Probe");
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}
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