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/****************************

 * High-level timing wrappers

 ****************************/

#include <stdio.h>

#include "fsecs.h"

#include "fcyc.h"

#include "clock.h"

#include "ftimer.h"

#include "config.h"

static double Mhz;  /* estimated CPU clock frequency */

extern int verbose; /* -v option in mdriver.c */

/*

 * init_fsecs - initialize the timing package

 */

void init_fsecs(void)

{

    Mhz = 0; /* keep gcc -Wall happy */

#if USE_FCYC

    if (verbose)

	printf("Measuring performance with a cycle counter.\n");

    /* set key parameters for the fcyc package */

    set_fcyc_maxsamples(20); 

    set_fcyc_clear_cache(1);

    set_fcyc_compensate(1);

    set_fcyc_epsilon(0.01);

    set_fcyc_k(3);

    Mhz = mhz(verbose > 0);

#elif USE_ITIMER

    if (verbose)

	printf("Measuring performance with the interval timer.\n");

#elif USE_GETTOD

    if (verbose)

	printf("Measuring performance with gettimeofday().\n");

#endif

}

/*

 * fsecs - Return the running time of a function f (in seconds)

 */

double fsecs(fsecs_test_funct f, void *argp) 

{

#if USE_FCYC

    double cycles = fcyc(f, argp);

    return cycles/(Mhz*1e6);

#elif USE_ITIMER

    return ftimer_itimer(f, argp, 10);

#elif USE_GETTOD

    return ftimer_gettod(f, argp, 10);

#endif 

}