OpenBLAS/benchmark/axpy.c

/***************************************************************************
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#include <stdio.h>
#include <stdlib.h>
#ifdef __CYGWIN32__
#include <sys/time.h>
#endif
#include "common.h"


#undef AXPY

#ifdef COMPLEX
#ifdef DOUBLE
#define AXPY   BLASFUNC(zaxpy)
#else
#define AXPY   BLASFUNC(caxpy)
#endif
#else
#ifdef DOUBLE
#define AXPY   BLASFUNC(daxpy)
#else
#define AXPY   BLASFUNC(saxpy)
#endif
#endif

#if defined(__WIN32__) || defined(__WIN64__)

#ifndef DELTA_EPOCH_IN_MICROSECS
#define DELTA_EPOCH_IN_MICROSECS 11644473600000000ULL
#endif

int gettimeofday(struct timeval *tv, void *tz){

  FILETIME ft;
  unsigned __int64 tmpres = 0;
  static int tzflag;

  if (NULL != tv)
    {
      GetSystemTimeAsFileTime(&ft);

      tmpres |= ft.dwHighDateTime;
      tmpres <<= 32;
      tmpres |= ft.dwLowDateTime;

      /*converting file time to unix epoch*/
      tmpres /= 10;  /*convert into microseconds*/
      tmpres -= DELTA_EPOCH_IN_MICROSECS;
      tv->tv_sec = (long)(tmpres / 1000000UL);
      tv->tv_usec = (long)(tmpres % 1000000UL);
    }

  return 0;
}

#endif

#if !defined(__WIN32__) && !defined(__WIN64__) && !defined(__CYGWIN32__) && 0

static void *huge_malloc(BLASLONG size){
  int shmid;
  void *address;

#ifndef SHM_HUGETLB
#define SHM_HUGETLB 04000
#endif

  if ((shmid =shmget(IPC_PRIVATE,
		     (size + HUGE_PAGESIZE) & ~(HUGE_PAGESIZE - 1),
		     SHM_HUGETLB | IPC_CREAT |0600)) < 0) {
    printf( "Memory allocation failed(shmget).\n");
    exit(1);
  }

  address = shmat(shmid, NULL, SHM_RND);

  if ((BLASLONG)address == -1){
    printf( "Memory allocation failed(shmat).\n");
    exit(1);
  }

  shmctl(shmid, IPC_RMID, 0);

  return address;
}

#define malloc huge_malloc

#endif

int main(int argc, char *argv[]){

  FLOAT *x, *y;
  FLOAT alpha[2] = { 2.0, 2.0 };
  blasint m, i;
  blasint inc_x=1,inc_y=1;
  int loops = 1;
  int l;
  char *p;

  int from =   1;
  int to   = 200;
  int step =   1;

  struct timeval start, stop;
  double time1,timeg;

  argc--;argv++;

  if (argc > 0) { from     = atol(*argv);		argc--; argv++;}
  if (argc > 0) { to       = MAX(atol(*argv), from);	argc--; argv++;}
  if (argc > 0) { step     = atol(*argv);		argc--; argv++;}

  if ((p = getenv("OPENBLAS_LOOPS")))  loops = atoi(p);
  if ((p = getenv("OPENBLAS_INCX")))   inc_x = atoi(p);
  if ((p = getenv("OPENBLAS_INCY")))   inc_y = atoi(p);

  fprintf(stderr, "From : %3d  To : %3d Step = %3d Inc_x = %d Inc_y = %d Loops = %d\n", from, to, step,inc_x,inc_y,loops);

  if (( x = (FLOAT *)malloc(sizeof(FLOAT) * to * abs(inc_x) * COMPSIZE)) == NULL){
    fprintf(stderr,"Out of Memory!!\n");exit(1);
  }

  if (( y = (FLOAT *)malloc(sizeof(FLOAT) * to * abs(inc_y) * COMPSIZE)) == NULL){
    fprintf(stderr,"Out of Memory!!\n");exit(1);
  }

#ifdef linux
  srandom(getpid());
#endif

  fprintf(stderr, "   SIZE       Flops\n");

  for(m = from; m <= to; m += step)
  {

   timeg=0;

   fprintf(stderr, " %6d : ", (int)m);


   for (l=0; l<loops; l++)
   {

   	for(i = 0; i < m * COMPSIZE * abs(inc_x); i++){
			x[i] = ((FLOAT) rand() / (FLOAT) RAND_MAX) - 0.5;
   	}

   	for(i = 0; i < m * COMPSIZE * abs(inc_y); i++){
			y[i] = ((FLOAT) rand() / (FLOAT) RAND_MAX) - 0.5;
   	}
    	gettimeofday( &start, (struct timezone *)0);

    	AXPY (&m, alpha, x, &inc_x, y, &inc_y );

    	gettimeofday( &stop, (struct timezone *)0);

    	time1 = (double)(stop.tv_sec - start.tv_sec) + (double)((stop.tv_usec - start.tv_usec)) * 1.e-6;

	timeg += time1;

    }

    timeg /= loops;

    fprintf(stderr,
	    " %10.2f MFlops\n",
	    COMPSIZE * COMPSIZE * 2. * (double)m / timeg * 1.e-6);

  }

  return 0;
}

// void main(int argc, char *argv[]) __attribute__((weak, alias("MAIN__")));