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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) 2007-2014 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2015-2016 Research Organization for Information Science
* and Technology (RIST). 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>
#include MCA_timer_IMPLEMENTATION_HEADER
#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/mpiruntime.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)
{
#if OPAL_TIMER_CYCLE_NATIVE
{
opal_timer_t freq = opal_timer_base_get_freq();
if (0 == freq) {
/* That should never happen, but if it does, return a bogus value
* rather than crashing with a division by zero */
return (double)0.0;
}
return (double)1.0 / (double)freq;
}
#elif OPAL_TIMER_USEC_NATIVE
return 0.000001;
#else
/* Otherwise, we already return usec precision. */
return 0.000001;
#endif
}
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