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/*
* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2005 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 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) 2007-2022 Cisco Systems, Inc. All rights reserved
* Copyright (c) 2015-2016 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2017 IBM Corporation. All rights reserved.
* Copyright (c) 2017 Los Alamos National Security, LLC. All rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <stdio.h>
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/mpiruntime.h"
#include "opal/util/clock_gettime.h"
#if OMPI_BUILD_MPI_PROFILING
#if OPAL_HAVE_WEAK_SYMBOLS
#pragma weak MPI_Wtick = PMPI_Wtick
#endif
#define MPI_Wtick PMPI_Wtick
#endif
double MPI_Wtick(void)
{
// We intentionally don't use the OPAL timer framework here. See
// https://github.com/open-mpi/ompi/issues/3003 for more details.
struct timespec spec;
double wtick = 0.0;
if (0 == opal_clock_getres(&spec)){
wtick = spec.tv_sec + spec.tv_nsec * 1.0e-09;
} else {
/* guess */
wtick = 1.0e-09;
}
return wtick;
}
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