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>
114 строки
3.7 KiB
C
114 строки
3.7 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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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) 2006 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2013 Los Alamos National Security, LLC. All rights
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* 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/datatype/ompi_datatype.h"
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#include "ompi/op/op.h"
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#include "ompi/memchecker.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_Scan = PMPI_Scan
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#endif
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#define MPI_Scan PMPI_Scan
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#endif
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static const char FUNC_NAME[] = "MPI_Scan";
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int MPI_Scan(const void *sendbuf, void *recvbuf, int count,
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MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
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{
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int err;
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SPC_RECORD(OMPI_SPC_SCAN, 1);
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MEMCHECKER(
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memchecker_datatype(datatype);
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memchecker_comm(comm);
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if (MPI_IN_PLACE != sendbuf) {
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memchecker_call(&opal_memchecker_base_isdefined, sendbuf, count, datatype);
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} else {
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memchecker_call(&opal_memchecker_base_isdefined, recvbuf, count, datatype);
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}
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);
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if (MPI_PARAM_CHECK) {
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char *msg;
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err = MPI_SUCCESS;
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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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/* No intercommunicators allowed! (MPI does not define
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MPI_SCAN on intercommunicators) */
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else if (OMPI_COMM_IS_INTER(comm)) {
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err = MPI_ERR_COMM;
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}
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/* Unrooted operation; checks for all ranks */
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else if (MPI_OP_NULL == op || NULL == op) {
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err = MPI_ERR_OP;
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} else if (MPI_IN_PLACE == recvbuf) {
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err = MPI_ERR_ARG;
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} else if (!ompi_op_is_valid(op, datatype, &msg, FUNC_NAME)) {
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int ret = OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_OP, msg);
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free(msg);
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return ret;
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} else {
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OMPI_CHECK_DATATYPE_FOR_SEND(err, datatype, count);
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}
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OMPI_ERRHANDLER_CHECK(err, comm, err, FUNC_NAME);
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}
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/* Do we need to do anything? (MPI says that reductions have to
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have a count of at least 1, but at least IMB calls reduce with
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a count of 0 -- blah!) */
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if (0 == count) {
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return MPI_SUCCESS;
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}
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OPAL_CR_ENTER_LIBRARY();
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/* Call the coll component to actually perform the allgather */
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OBJ_RETAIN(op);
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err = comm->c_coll->coll_scan(sendbuf, recvbuf, count,
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datatype, op, comm,
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comm->c_coll->coll_scan_module);
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OBJ_RELEASE(op);
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OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
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}
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