timertest.c

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/** @file timertest.c test harness for timer.
 */


#include <stdio.h>
#include <stdlib.h>
#include "x86timer.h"


int main(int argc, char* argv[])
{
        unsigned long long raw[10];
        unsigned long times[10];
        unsigned int delay = 1;
        int ii;

        if (argc > 1) delay = atoi(argv[1]);
        
        get_cpu_clock_speed();    /** inits library */

        printf("timertest get_cpu_clock_speed %d\n", get_cpu_clock_speed());

        printf("raw\n");
        for (ii = 0; ii != 10; ++ii){
                raw[ii] = get_cpu_ticks();
        }

        for (ii = 0; ii != 10; ++ii){
                printf("%2d ticks 0x%016Lx %16Lu usecs %10Lu\n", 
                       ii, raw[ii], raw[ii], raw[ii]/get_cpu_clock_speed());
        }       

        


        for (ii = 0; ii != 10; ++ii){
                times[ii] = get_elapsed_microseconds(ii == 0);
        }

        printf("No Delay Loop\n");

        for (ii = 0; ii != 10; ++ii){
                printf("%2d usecs %10lu\n", ii, times[ii]);
        }       

        printf("Delay Loop %d\n", delay);

        for (ii = 0; ii != 10; ++ii){
                times[ii] = get_elapsed_microseconds(ii == 0);
                cpu_delay_awhile(delay);
        }

        for (ii = 0; ii != 10; ++ii){
                printf("%2d usecs %10lu\n", ii, times[ii]);
        }       
        return 0;
}