OpenBLAS/benchmark/trmv.c

/***************************************************************************
Copyright (c) 2014, The OpenBLAS Project
All rights reserved.
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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*****************************************************************************/

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

#undef TRMV

#ifndef COMPLEX

#ifdef DOUBLE
#define TRMV   BLASFUNC(dtrmv)
#else
#define TRMV   BLASFUNC(strmv)
#endif

#else

#ifdef DOUBLE
#define TRMV   BLASFUNC(ztrmv)
#else
#define TRMV   BLASFUNC(ctrmv)
#endif

#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 *a, *x;
    char *p;

    char uplo ='U';
    char trans='N';
    char diag ='U';

    int loops = 1;
    int l;
    blasint inc_x=1;

    if ((p = getenv("OPENBLAS_UPLO"))) uplo=*p;
    if ((p = getenv("OPENBLAS_TRANS"))) trans=*p;
    if ((p = getenv("OPENBLAS_DIAG"))) diag=*p;
    if ((p = getenv("OPENBLAS_LOOPS")))  loops = atoi(p);
    if ((p = getenv("OPENBLAS_INCX")))   inc_x = atoi(p);

    blasint n, i, j;

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

    struct timespec start = { 0, 0 }, stop = { 0, 0 };
    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++;}

    fprintf(stderr, "From : %3d  To : %3d Step = %3d Uplo = %c Trans = %c  Diag = %c Loops=%d Inc_x=%d\n", from,
            to, step, uplo, trans, diag, loops, inc_x);

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

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

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

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

    for(n = from; n <= to; n += step) {
        timeg=0;

        fprintf(stderr, " %6d : ", (int)n);
        for(j = 0; j < n; j++) {
            for(i = 0; i < n * COMPSIZE; i++) {
                a[(long)i + (long)j * (long)n * COMPSIZE] = ((FLOAT) rand() / (FLOAT) RAND_MAX) - 0.5;
            }
        }

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

        for (l = 0; l < loops; l++) {
            clock_gettime(CLOCK_REALTIME, &start);
            TRMV (&uplo, &trans, &diag, &n, a, &n, x, &inc_x);
            clock_gettime(CLOCK_REALTIME, &stop);

            time1 = (double)(stop.tv_sec - start.tv_sec) + (double)((stop.tv_nsec - start.tv_nsec)) / 1.e9;
            timeg += time1;
        }

        timeg /= loops;
        fprintf(stderr, " %10.2f MFlops %12.9f sec\n",
                COMPSIZE * COMPSIZE * 1. * (double)n * (double)n / timeg / 1.e6, timeg);
    }

    return 0;
}

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