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/*
* -- High Performance Computing Linpack Benchmark (HPL)
* HPL - 2.0 - September 10, 2008
* Antoine P. Petitet
* University of Tennessee, Knoxville
* Innovative Computing Laboratory
* (C) Copyright 2000-2008 All Rights Reserved
*
* -- Copyright notice and Licensing terms:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions, and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgement:
* This product includes software developed at the University of
* Tennessee, Knoxville, Innovative Computing Laboratory.
*
* 4. The name of the University, the name of the Laboratory, or the
* names of its contributors may not be used to endorse or promote
* products derived from this software without specific written
* permission.
*
* -- Disclaimer:
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ---------------------------------------------------------------------
*/
/*
* Include files
*/
#include "hpl.h"
/*
* Purpose
* =======
*
* HPL_timer_walltime returns the elapsed (wall-clock) time.
*
*
* ---------------------------------------------------------------------
*/
#if defined( HPL_USE_GETTIMEOFDAY )
#include <sys/time.h>
#include <sys/resource.h>
#ifdef HPL_STDC_HEADERS
double HPL_timer_walltime( void )
#else
double HPL_timer_walltime()
#endif
{
struct timeval tp;
static long start=0, startu;
if( !start )
{
(void) gettimeofday( &tp, NULL );
start = tp.tv_sec;
startu = tp.tv_usec;
return( HPL_rzero );
}
(void) gettimeofday( &tp, NULL );
return( (double)( tp.tv_sec - start ) +
( (double)( tp.tv_usec-startu ) / 1000000.0 ) );
}
#else
#ifdef HPL_STDC_HEADERS
double HPL_timer_walltime( void )
#else
double HPL_timer_walltime()
#endif
{
return( MPI_Wtime() );
}
#endif
/*
* End of HPL_timer_walltime
*/
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