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openmpi/ompi/mpi/c/cancel.c
David Eberius d377a6b6f4 Added Software-based Performance Counters driver code along with several counters.
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>
2018-06-11 22:48:16 -04:00

72 строки
2.1 KiB
C

/*
* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2018 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2008 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 (c) 2009 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2015 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <stdio.h>
#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/params.h"
#include "ompi/communicator/communicator.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/request/request.h"
#include "ompi/memchecker.h"
#include "ompi/runtime/ompi_spc.h"
#if OMPI_BUILD_MPI_PROFILING
#if OPAL_HAVE_WEAK_SYMBOLS
#pragma weak MPI_Cancel = PMPI_Cancel
#endif
#define MPI_Cancel PMPI_Cancel
#endif
static const char FUNC_NAME[] = "MPI_Cancel";
int MPI_Cancel(MPI_Request *request)
{
int rc;
SPC_RECORD(OMPI_SPC_CANCEL, 1);
MEMCHECKER(
memchecker_request(request);
);
if ( MPI_PARAM_CHECK ) {
rc = MPI_SUCCESS;
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if (NULL == request || NULL == *request ||
MPI_REQUEST_NULL == *request) {
OMPI_ERRHANDLER_RETURN(MPI_ERR_REQUEST, MPI_COMM_WORLD,
MPI_ERR_REQUEST, FUNC_NAME);
}
}
if (MPI_REQUEST_NULL == *request) {
return MPI_SUCCESS;
}
OPAL_CR_ENTER_LIBRARY();
rc = ompi_request_cancel(*request);
OMPI_ERRHANDLER_RETURN(rc, MPI_COMM_WORLD, rc, FUNC_NAME);
}