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"

/*

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

 * Static variables

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

 */

static int                    HPL_timer_disabled;

static double                 HPL_timer_cpusec   [HPL_NTIMER],

                              HPL_timer_cpustart [HPL_NTIMER],

                              HPL_timer_wallsec  [HPL_NTIMER],

                              HPL_timer_wallstart[HPL_NTIMER];

/*

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

 * User callable functions

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

 */

#ifdef STDC_HEADERS

void HPL_timer_boot( void )

#else

void HPL_timer_boot()

#endif

{

/*

 * HPL_timer_boot (re)sets all timers to 0, and enables HPL_timer.

 */

/*

 * .. Local Variables ..

 */

   int                        i;

/* ..

 * .. Executable Statements ..

 */

   HPL_timer_disabled = 0;

   for( i = 0; i < HPL_NTIMER; i++ )

   {

      HPL_timer_cpusec  [i] = HPL_timer_wallsec  [i] = HPL_rzero;

      HPL_timer_cpustart[i] = HPL_timer_wallstart[i] = HPL_TIMER_STARTFLAG;

   }

/*

 * End of HPL_timer_boot

 */

}

#ifdef STDC_HEADERS

void HPL_timer( const int I )

#else

void HPL_timer( I )

   const int                  I;

#endif

{

/* 

 * Purpose

 * =======

 *

 * HPL_timer provides a  "stopwatch"  functionality  cpu/wall  timer  in

 * seconds.  Up to  64  separate timers can be functioning at once.  The

 * first call starts the timer,  and the second stops it.  This  routine

 * can be disenabled  by calling  HPL_timer_disable(),  so that calls to

 * the timer are ignored.  This feature can be used to make sure certain

 * sections of code do not affect timings,  even  if  they call routines

 * which have HPL_timer calls in them. HPL_timer_enable() will re-enable

 * the  timer  functionality.  One  can retrieve  the current value of a

 * timer by calling

 *  

 * t0 = HPL_timer_inquire( HPL_WALL_TIME | HPL_CPU_TIME, I )

 *  

 * where  I  is the timer index in  [0..64).  To  initialize  the  timer

 * functionality, one must have called HPL_timer_boot()  prior to any of

 * the functions mentioned above.

 *

 * Arguments

 * =========

 *

 * I       (global input)                const int

 *         On entry, I specifies the timer to stop/start.

 *

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

 */ 

/* ..

 * .. Executable Statements ..

 */

   if( HPL_timer_disabled ) return;

/*

 * If timer has not been started, start it.  Otherwise,  stop it and add

 * interval to count

 */

   if( HPL_timer_wallstart[I] == HPL_TIMER_STARTFLAG )

   {

      HPL_timer_wallstart[I] = HPL_timer_walltime();

      HPL_timer_cpustart [I] = HPL_timer_cputime ();

   }

   else

   {

      HPL_timer_cpusec   [I] += HPL_timer_cputime () - HPL_timer_cpustart [I];

      HPL_timer_wallsec  [I] += HPL_timer_walltime() - HPL_timer_wallstart[I];

      HPL_timer_wallstart[I]  = HPL_TIMER_STARTFLAG;

   }

/*

 * End of HPL_timer

 */

}

#ifdef STDC_HEADERS

void HPL_timer_enable( void )

#else

void HPL_timer_enable()

#endif

{

/*

 * HPL_timer_enable sets it so calls to HPL_timer are not ignored.

 */

/* ..

 * .. Executable Statements ..

 */

   HPL_timer_disabled = 0;

   return;

/*

 * End of HPL_timer_enable

 */

}

#ifdef STDC_HEADERS

void HPL_timer_disable( void )

#else

void HPL_timer_disable()

#endif

{

/*

 * HPL_timer_disable sets it so calls to HPL_timer are ignored.

 */

/* ..

 * .. Executable Statements ..

 */

   HPL_timer_disabled = 1;

   return;

/*

 * End of HPL_timer_disable

 */

}

#ifdef STDC_HEADERS

double HPL_timer_inquire

(

   const HPL_T_TIME           TMTYPE,

   const int                  I

)

#else

double HPL_timer_inquire( TMTYPE, I )

   const int                  I;

   const HPL_T_TIME           TMTYPE;

#endif

{

/*

 * Purpose

 * =======

 *

 * HPL_timer_inquire returns  wall- or cpu- time that has accumulated in

 * timer I.

 *

 * Arguments

 * =========

 *

 * TMTYPE  (global input)              const HPL_T_TIME

 *         On entry, TMTYPE specifies what time will be returned as fol-

 *         lows

 *            = HPL_WALL_TIME : wall clock time is returned,

 *            = HPL_CPU_TIME  : CPU time is returned (default).

 *

 * I       (global input)              const int

 *         On entry, I specifies the timer to return.

 *

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

 */

/*

 * .. Local Variables ..

 */

   double          time;

/* ..

 * .. Executable Statements ..

 */

/*

 * If wall- or cpu-time are not available on this machine, return

 * HPL_TIMER_ERROR

 */

   if( TMTYPE == HPL_WALL_TIME )

   {

      if( HPL_timer_walltime() == HPL_TIMER_ERROR )

         time = HPL_TIMER_ERROR;

      else

         time = HPL_timer_wallsec[I];

   }

   else

   {

      if( HPL_timer_cputime()  == HPL_TIMER_ERROR )

         time = HPL_TIMER_ERROR;

      else

         time = HPL_timer_cpusec [I];

   }

   return( time );

/*

 * End of HPL_timer_inquire

 */

}