mpv/TOOLS/fastmemcpybench.c

/*
 * benchmark tool for fast_memcpy code from libvo
 *
 * NOTE: This code can not be used on Pentium MMX / II because they contain
 * a bug in rdtsc. For Intel processors since P6(PII) rdpmc should be used
 * instead. For PIII it's disputable and it seems the bug was fixed but this
 * was not confirmed through testing.
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <inttypes.h>

#include "config.h"
#include "cpudetect.h"

#define BLOCK_SIZE 4096
#define CONFUSION_FACTOR 0

#if HAVE_MMX
#define COMPILE_MMX
#endif

#if HAVE_MMX2
#define COMPILE_MMX2
#endif

#if HAVE_AMD3DNOW
#define COMPILE_AMD3DNOW
#endif

#if HAVE_SSE
#define COMPILE_SSE
#endif

#ifdef COMPILE_MMX
#undef RENAME
#undef HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_AMD3DNOW
#undef HAVE_SSE
#undef HAVE_SSE2
#define HAVE_MMX 1
#define HAVE_MMX2 0
#define HAVE_AMD3DNOW 0
#define HAVE_SSE 0
#define HAVE_SSE2 0
#define RENAME(a) a ## _MMX
#include "libvo/aclib_template.c"
#endif

#ifdef COMPILE_MMX2
#undef RENAME
#undef HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_AMD3DNOW
#undef HAVE_SSE
#undef HAVE_SSE2
#define HAVE_MMX 1
#define HAVE_MMX2 1
#define HAVE_AMD3DNOW 0
#define HAVE_SSE 0
#define HAVE_SSE2 0
#define RENAME(a) a ## _MMX2
#include "libvo/aclib_template.c"
#endif

#ifdef COMPILE_AMD3DNOW
#undef RENAME
#undef HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_AMD3DNOW
#undef HAVE_SSE
#undef HAVE_SSE2
#define HAVE_MMX 1
#define HAVE_MMX2 0
#define HAVE_AMD3DNOW 1
#define HAVE_SSE 0
#define HAVE_SSE2 0
#define RENAME(a) a ## _3DNow
#include "libvo/aclib_template.c"
#endif

#ifdef COMPILE_SSE
#undef RENAME
#undef HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_AMD3DNOW
#undef HAVE_SSE
#undef HAVE_SSE2
#define HAVE_MMX 1
#define HAVE_MMX2 1
#define HAVE_AMD3DNOW 0
#define HAVE_SSE 1
#define HAVE_SSE2 1
#define RENAME(a) a ## _SSE
#include "libvo/aclib_template.c"
#endif

//#define ARR_SIZE 100000
#define ARR_SIZE (1024*768*2)

#ifdef CONFIG_MGA

#include "drivers/mga_vid.h"

static mga_vid_config_t mga_vid_config;
static unsigned char* frame = NULL;
static int f;

static int mga_init(void)
{
    f = open("/dev/mga_vid", O_RDWR);
    if (f == -1) {
        fprintf(stderr, "Couldn't open /dev/mga_vid.\n");
        return -1;
    }

    mga_vid_config.num_frames = 1;
    mga_vid_config.frame_size = ARR_SIZE;
    mga_vid_config.format     = MGA_VID_FORMAT_YUY2;

    mga_vid_config.colkey_on   =   0;
    mga_vid_config.src_width   = 640;
    mga_vid_config.src_height  = 480;
    mga_vid_config.dest_width  = 320;
    mga_vid_config.dest_height = 200;
    mga_vid_config.x_org       =   0;
    mga_vid_config.y_org       =   0;

    mga_vid_config.version     = MGA_VID_VERSION;
    if (ioctl(f, MGA_VID_CONFIG, &mga_vid_config)) {
        perror("Error in mga_vid_config ioctl()");
        printf("Your mga_vid driver version is incompatible with this MPlayer version!\n");
        exit(1);
    }
    ioctl(f, MGA_VID_ON, 0);

    frame = (char*)mmap(0, mga_vid_config.frame_size*mga_vid_config.num_frames,
                        PROT_WRITE,MAP_SHARED, f, 0);
    if (!frame) {
        printf("Can't mmap MGA frame.\n");
        exit(1);
    }

    //clear the buffer
    //memset(frames[0], 0x80, mga_vid_config.frame_size*mga_vid_config.num_frames);

    return 0;
}

#endif

// Returns current time in microseconds
static unsigned int GetTimer(void)
{
    struct timeval tv;
    struct timezone tz;
    //float s;
    gettimeofday(&tv, &tz);
    //s = tv.tv_usec; s *= 0.000001; s += tv.tv_sec;
    return tv.tv_sec * 1000000 + tv.tv_usec;
}

static inline unsigned long long int read_tsc(void)
{
    unsigned long long int retval;
    __asm__ volatile ("rdtsc":"=A" (retval)::"memory");
    return retval;
}

unsigned char __attribute__((aligned(4096)))arr1[ARR_SIZE], arr2[ARR_SIZE];

int main(void)
{
    unsigned long long int v1, v2;
    unsigned char *marr1, *marr2;
    int i;
    unsigned int t;
#ifdef CONFIG_MGA
    mga_init();
    marr1 = &frame[3];
#else
    marr1 = &arr1[0];
#endif
    marr2 = &arr2[0];

    for (i = 0; i < ARR_SIZE - 16; i++)
        marr1[i] = marr2[i] = i;

#define testblock(func, name)                                                \
    t  = GetTimer();                                                         \
    v1 = read_tsc();                                                         \
    for (i = 0; i < 100; i++)                                                \
        func(marr1, marr2, ARR_SIZE - 16);                                   \
    v2 = read_tsc();                                                         \
    t  = GetTimer() - t;                                                     \
    /* ARR_SIZE*100 / (1024*1024) / (t/1000000) = ARR_SIZE*95.36743 / t */   \
    printf(name "CPU clocks=%llu = %dus  (%5.3ffps)  %5.1fMB/s\n", v2-v1, t, \
           100000000.0f / (float)t, (float)ARR_SIZE*95.36743f / (float)t);

    testblock(memcpy, "libc:   ");

#if HAVE_MMX
    testblock(fast_memcpy_MMX, "MMX:    ");
#endif

#if HAVE_AMD3DNOW
    testblock(fast_memcpy_3DNow, "3DNow!: ");
#endif

#if HAVE_MMX2
    testblock(fast_memcpy_MMX2, "MMX2:   ");
#endif

#if HAVE_SSE
    testblock(fast_memcpy_SSE, "SSE:    ");
#endif

    return 0;
}