OpenBLAS/benchmark/rotm.c

/***************************************************************************
Copyright (c) 2014, The OpenBLAS Project
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#include <stdio.h>
#include <stdlib.h>
#ifdef __CYGWIN32__
#include <sys/time.h>
#endif
#include "common.h"

#undef ROTM

#ifdef DOUBLE
#define ROTM BLASFUNC(drotm)
#else
#define ROTM BLASFUNC(srotm)
#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 result;
    blasint m, i;
    blasint inc_x = 1, inc_y = 1;
    FLOAT param[5] = {1, 2.0, 3.0, 4.0, 5.0};
    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 (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;
        }

        for (l = 0; l < loops; l++) {
            gettimeofday(&start, (struct timezone *)0);

            ROTM(&m, x, &inc_x, y, &inc_y, param);

            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 %10.6f sec\n",
                COMPSIZE * COMPSIZE * 6. * (double)m / timeg * 1.e-6, timeg);
    }

    return 0;
}