Centre Blaise Pascal » HPL sur GPU

/* 

 * -- 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_ptimer_cputime returns the cpu time. If HPL_USE_CLOCK is defined,

 * the  clock() function is used to return an approximation of processor

 * time used by the program.  The value returned is the CPU time used so

 * far as a clock_t;  to get the number of seconds used,  the result  is

 * divided by  CLOCKS_PER_SEC.  This function is part of the  ANSI/ISO C

 * standard library.  If  HPL_USE_TIMES is defined, the times() function

 * is used instead.  This  function  returns  the current process times.

 * times() returns the number of clock ticks that have elapsed since the

 * system has been up.  Otherwise and by default,  the  standard library

 * function getrusage() is used.

 *

 * ---------------------------------------------------------------------

 */ 

#if   defined( HPL_USE_CLOCK )

#include <time.h>

#ifdef STDC_HEADERS

double HPL_ptimer_cputime( void )

#else

double HPL_ptimer_cputime()

#endif

{

   static double              cps = CLOCKS_PER_SEC;

   double                     d;

   clock_t                    t1;

   static clock_t             t0 = 0;

   if( t0 == 0 ) t0 = clock();

   t1 = clock() - t0;

   d = (double)(t1) / cps;

   return( d );

}

#elif defined( HPL_USE_TIMES )

#include <sys/times.h>

#include <unistd.h>

#ifdef STDC_HEADERS

double HPL_ptimer_cputime( void )

#else

double HPL_ptimer_cputime()

#endif

{

   clock_t                    t1;

   struct tms                 ts;

   static double              ClockTick = HPL_rzero;

   if( ClockTick == HPL_rzero ) ClockTick = (double)(sysconf(_SC_CLK_TCK));

   (void) times( &ts );

   return( (double)(ts.tms_utime) / ClockTick );

}

/* #elif defined( HPL_USE_GETRUSAGE ) */

#else

#include <sys/time.h>

#include <sys/resource.h>

#ifdef STDC_HEADERS

double HPL_ptimer_cputime( void )

#else

double HPL_ptimer_cputime()

#endif

{

   struct rusage              ruse;

   (void) getrusage( RUSAGE_SELF, &ruse );

   return( (double)( ruse.ru_utime.tv_sec  ) +

           ( (double)( ruse.ru_utime.tv_usec ) / 1000000.0 ) );

}

/* 

#else

#ifdef STDC_HEADERS

double HPL_ptimer_cputime( void )

#else

double HPL_ptimer_cputime()

#endif

{

   return( HPL_PTIMER_ERROR );

}

*/ 

#endif

/*

 * End of HPL_ptimer_cputime

 */