perf_memcpy32_s.c

/*
 * perf_memcpy32_s.c
 */

#include "test_private.h"
#include "safe_mem_lib.h"
#include "perf_private.h"

#define LEN (1024 * 20)

uint32_t mem1[LEN];
uint32_t mem2[LEN];

uint16_t mem3[LEN];
uint16_t mem4[LEN];

static void timing_loop(uint32_t len, uint32_t loops) {
    uint32_t i;

    uint64_t clock_start;
    uint64_t clock_end;

    clock_t sl_clock_diff;
    clock_t sd_clock_diff;

    double sl_clock_dur;
    double sd_clock_dur;

    len = len * 2;

    for (i = 0; i < LEN; i++) {
        mem1[i] = 33;
    }
    for (i = 0; i < LEN; i++) {
        mem2[i] = 44;
    }

    //    printf("\n Timing %d byte copy, %u loops \n", len, loops);

    /*
     * Safe C Lib Routine
     */
    clock_start = timer_start();
    for (i = 0; i < loops; i++) {
        (void)memcpy32_s(mem1, len, mem2, len);
    }
    clock_end = timer_end();

    /*
     * Note that background stuff continues to run, i.e. interrupts, so
     * we need to compute average time per loop
     */
    sl_clock_diff = (clock_end - clock_start) / loops;

    /*
     * Standard C Routine
     */
    clock_start = timer_start();
    for (i = 0; i < loops; i++) {
        (void)memcpy16_s(mem3, len, mem4, len);
        // memcpy(mem1, mem2, len);
    }
    clock_end = timer_end();

    /*
     * Note that background stuff continues to run, i.e. interrupts, so
     * we need to compute average time per loop
     */
    sd_clock_diff = (clock_end - clock_start) / loops;

    /* convert to seconds */
    sl_clock_dur = ((double)(sl_clock_diff) / CLOCKS_PER_SEC);
    sd_clock_dur = ((double)(sd_clock_diff) / CLOCKS_PER_SEC);

    printf("%u  %u  memcpy32_s %1.9f  memcpy16_s %1.9f  \n", loops, len,
           sl_clock_dur, sd_clock_dur);

    return;
}

int main(void) {
    uint32_t loops;
    rsize_t len;

    /*--------------------------------------------------*/

    printf("\n\n");

    loops = 400;

    len = 1024;
    timing_loop(len, loops);

    len = 1024 * 2;
    timing_loop(len, loops);

    len = 1024 * 3;
    timing_loop(len, loops);

    len = 1024 * 4;
    timing_loop(len, loops);

    len = 1024 * 5;
    timing_loop(len, loops);

    len = 1024 * 6;
    timing_loop(len, loops);

    len = 1024 * 7;
    timing_loop(len, loops);

    len = 1024 * 8;
    timing_loop(len, loops);

    /*--------------------------------------------------*/

    printf("\n\n");

    loops = 600;

    len = 1024;
    timing_loop(len, loops);

    len = 1024 * 2;
    timing_loop(len, loops);

    len = 1024 * 3;
    timing_loop(len, loops);

    len = 1024 * 4;
    timing_loop(len, loops);

    len = 1024 * 5;
    timing_loop(len, loops);

    len = 1024 * 6;
    timing_loop(len, loops);

    len = 1024 * 7;
    timing_loop(len, loops);

    len = 1024 * 8;
    timing_loop(len, loops);

    /*--------------------------------------------------*/

    printf("\n\n");

    loops = 800;

    len = 1024;
    timing_loop(len, loops);

    len = 1024 * 2;
    timing_loop(len, loops);

    len = 1024 * 3;
    timing_loop(len, loops);

    len = 1024 * 4;
    timing_loop(len, loops);

    len = 1024 * 5;
    timing_loop(len, loops);

    len = 1024 * 6;
    timing_loop(len, loops);

    len = 1024 * 7;
    timing_loop(len, loops);

    len = 1024 * 8;
    timing_loop(len, loops);

    /*--------------------------------------------------*/
    /*--------------------------------------------------*/

    return (0);
}