b9331527f5
better solution needed later workaround for #3003 Signed-off-by: Howard Pritchard <howardp@lanl.gov>
84 строки
2.4 KiB
C
84 строки
2.4 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) 2004-2005 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) 2004-2005 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) 2007-2014 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2015-2016 Research Organization for Information Science
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* and Technology (RIST). All rights reserved.
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* Copyright (c) 2017 IBM Corporation. All rights reserved.
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* Copyright (c) 2017 Los Alamos National Security, LLC. All rights
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* 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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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#include <stdio.h>
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#ifdef HAVE_TIME_H
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#include <time.h>
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#endif
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#include MCA_timer_IMPLEMENTATION_HEADER
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#include "ompi/mpi/c/bindings.h"
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#include "ompi/runtime/mpiruntime.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_Wtick = PMPI_Wtick
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#endif
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#define MPI_Wtick PMPI_Wtick
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#endif
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double MPI_Wtick(void)
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{
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OPAL_CR_NOOP_PROGRESS();
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/*
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* See https://github.com/open-mpi/ompi/issues/3003
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* to get an idea what's going on here.
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*/
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#if 0
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#if OPAL_TIMER_CYCLE_NATIVE
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{
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opal_timer_t freq = opal_timer_base_get_freq();
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if (0 == freq) {
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/* That should never happen, but if it does, return a bogus value
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* rather than crashing with a division by zero */
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return (double)0.0;
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}
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return (double)1.0 / (double)freq;
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}
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#elif OPAL_TIMER_USEC_NATIVE
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return 0.000001;
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#endif
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#else
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#if defined(__linux__) && OPAL_HAVE_CLOCK_GETTIME
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struct timespec spec;
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double wtick = 0.0;
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if (0 == clock_getres(CLOCK_MONOTONIC, &spec)){
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wtick = spec.tv_sec + spec.tv_nsec * 1.0e-09;
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} else {
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/* guess */
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wtick = 1.0e-09;
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}
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return wtick;
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#else
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/* Otherwise, we already return usec precision. */
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return 0.000001;
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#endif
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#endif
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}
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