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_ptimer_disabled;

static double      HPL_ptimer_cpusec   [HPL_NPTIMER],

                   HPL_ptimer_cpustart [HPL_NPTIMER],

                   HPL_ptimer_wallsec  [HPL_NPTIMER],

                   HPL_ptimer_wallstart[HPL_NPTIMER];

/*

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

 * User callable functions

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

 */

#ifdef STDC_HEADERS

void HPL_ptimer_boot( void )

#else

void HPL_ptimer_boot()

#endif

{

/*

 * HPL_ptimer_boot (re)sets all timers to 0, and enables HPL_ptimer.

 */

/*

 * .. Local Variables ..

 */

   int                        i;

/* ..

 * .. Executable Statements ..

 */

   HPL_ptimer_disabled = 0;

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

   {

      HPL_ptimer_cpusec  [i] = HPL_ptimer_wallsec  [i] = HPL_rzero;

      HPL_ptimer_cpustart[i] = HPL_ptimer_wallstart[i] = HPL_PTIMER_STARTFLAG;

   }

/*

 * End of HPL_ptimer_boot

 */

}

#ifdef STDC_HEADERS

void HPL_ptimer( const int I )

#else

void HPL_ptimer( I )

   const int                  I;

#endif

{

/* 

 * Purpose

 * =======

 *

 * HPL_ptimer 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_ptimer_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_ptimer calls in them. HPL_ptimer_enable()  will enable

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

 * timer by calling

 *  

 * t0 = HPL_ptimer_inquire( HPL_WALL_TIME | HPL_CPU_TIME, I )

 *  

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

 * functionality, one must have called HPL_ptimer_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_ptimer_disabled ) return;

/*

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

 * interval to count

 */

   if( HPL_ptimer_wallstart[I] == HPL_PTIMER_STARTFLAG )

   {

      HPL_ptimer_wallstart[I] = HPL_ptimer_walltime();

      HPL_ptimer_cpustart [I] = HPL_ptimer_cputime ();

   }

   else

   {

      HPL_ptimer_cpusec   [I] += HPL_ptimer_cputime ()-HPL_ptimer_cpustart [I];

      HPL_ptimer_wallsec  [I] += HPL_ptimer_walltime()-HPL_ptimer_wallstart[I];

      HPL_ptimer_wallstart[I]  = HPL_PTIMER_STARTFLAG;

   }

/*

 * End of HPL_ptimer

 */

} 

#ifdef STDC_HEADERS

void HPL_ptimer_enable( void )

#else

void HPL_ptimer_enable()

#endif

{

/*

 * HPL_ptimer_enable sets it so calls to HPL_ptimer are not ignored.

 */

/* ..

 * .. Executable Statements ..

 */

   HPL_ptimer_disabled = 0;

   return;

/*

 * End of HPL_ptimer_enable

 */

} 

#ifdef STDC_HEADERS

void HPL_ptimer_disable( void )

#else

void HPL_ptimer_disable()

#endif

{

/*

 * HPL_ptimer_disable sets it so calls to HPL_ptimer are ignored.

 */

/* ..

 * .. Executable Statements ..

 */

   HPL_ptimer_disabled = 1;

   return;

/*

 * End of HPL_ptimer_disable

 */

} 

#ifdef STDC_HEADERS

double HPL_ptimer_inquire

(

   const HPL_T_PTIME          TMTYPE,

   const int                  I

)

#else

double HPL_ptimer_inquire( TMTYPE, I )

   const int                  I;

   const HPL_T_PTIME          TMTYPE;

#endif

{

/*

 * Purpose

 * =======

 *

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

 * timer I.

 *

 * Arguments

 * =========

 *

 * TMTYPE  (global input)              const HPL_T_PTIME

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

 *         lows

 *            = HPL_WALL_PTIME : wall clock time is returned,

 *            = HPL_CPU_PTIME  : 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_PTIMER_ERROR

 */

   if( TMTYPE == HPL_WALL_PTIME )

   {

      if( HPL_ptimer_walltime() == HPL_PTIMER_ERROR )

         time = HPL_PTIMER_ERROR;

      else

         time = HPL_ptimer_wallsec[I];

   }

   else

   {

      if( HPL_ptimer_cputime()  == HPL_PTIMER_ERROR )

         time = HPL_PTIMER_ERROR;

      else

         time = HPL_ptimer_cpusec [I];

   }

   return( time );

/*

 * End of HPL_ptimer_inquire

 */

}

#ifdef STDC_HEADERS

void HPL_ptimer_combine

(

   MPI_Comm                   COMM,

   const HPL_T_PTIME_OP       OPE,

   const HPL_T_PTIME          TMTYPE,

   const int                  N,

   const int                  IBEG,

   double                     * TIMES

)

#else

void HPL_ptimer_combine( COMM, OPE, TMTYPE, N, IBEG, TIMES )

   const int                  IBEG, N;

   const HPL_T_PTIME_OP       OPE;

   const HPL_T_PTIME          TMTYPE;

   MPI_Comm                   COMM;

   double                     * TIMES;

#endif

{

/*

 * Purpose

 * =======

 *

 * HPL_ptimer_combine  combines the timing information stored on a scope

 * of processes into the user TIMES array.

 *

 * Arguments

 * =========

 *

 * COMM    (global/local input)        MPI_Comm

 *         The MPI communicator  identifying  the process  collection on

 *         which the timings are taken.

 *

 * OPE     (global input)              const HPL_T_PTIME_OP

 *         On entry, OP  specifies what combine operation should be done

 *         as follows:

 *            = HPL_AMAX_PTIME get max. time on any process (default),

 *            = HPL_AMIN_PTIME get min. time on any process,

 *            = HPL_SUM_PTIME  get sum of times across processes.

 *

 * TMTYPE  (global input)              const HPL_T_PTIME

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

 *         lows

 *            = HPL_WALL_PTIME : wall clock time is returned,

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

 *

 * N       (global input)              const int

 *         On entry, N specifies the number of timers to combine.

 *

 * IBEG    (global input)              const int

 *         On entry, IBEG specifies the first timer to be combined.

 *

 * TIMES   (global output)             double *

 *         On entry, TIMES is an array of dimension at least N. On exit,

 *         this array contains the requested timing information.

 *

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

 */

/*

 * .. Local Variables ..

 */

   int                        i, tmpdis;

/* ..

 * .. Executable Statements ..

 */

   tmpdis = HPL_ptimer_disabled; HPL_ptimer_disabled = 1;

/*

 * Timer has been disabled for combine operation -  copy timing informa-

 * tion into user times array.  If  wall- or  cpu-time are not available

 * on this machine, fill in times with HPL_PTIMER_ERROR flag and return.

 */

   if( TMTYPE == HPL_WALL_PTIME )

   {

      if( HPL_ptimer_walltime() == HPL_PTIMER_ERROR )

      { for( i = 0; i < N; i++ ) TIMES[i] = HPL_PTIMER_ERROR; return;   }

      else

      { for( i = 0; i < N; i++ ) TIMES[i] = HPL_ptimer_wallsec[IBEG+i]; }

   }

   else

   {

      if( HPL_ptimer_cputime() == HPL_PTIMER_ERROR )

      { for( i = 0; i < N; i++ ) TIMES[i] = HPL_PTIMER_ERROR; return;  }

      else

      { for( i = 0; i < N; i++ ) TIMES[i] = HPL_ptimer_cpusec[IBEG+i]; }

   }

/*

 * Combine all nodes information, restore HPL_ptimer_disabled, and return

 */

   for( i = 0; i < N; i++ ) TIMES[i] = Mmax( HPL_rzero, TIMES[i] );

   if(      OPE == HPL_AMAX_PTIME )

      (void) HPL_all_reduce( (void *)(TIMES), N, HPL_DOUBLE, HPL_max, COMM );

   else if( OPE == HPL_AMIN_PTIME )

      (void) HPL_all_reduce( (void *)(TIMES), N, HPL_DOUBLE, HPL_min, COMM );

   else if( OPE == HPL_SUM_PTIME  )

      (void) HPL_all_reduce( (void *)(TIMES), N, HPL_DOUBLE, HPL_sum, COMM );

   else

      (void) HPL_all_reduce( (void *)(TIMES), N, HPL_DOUBLE, HPL_max, COMM );

   HPL_ptimer_disabled = tmpdis;

/*

 * End of HPL_ptimer_combine

 */

}