#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <sys/time.h>
#include <stdlib.h>
#include "jitter.h"
#define NBUF 80002
#define FRAC 4294967296.
#define JAN_1970 2208988800UL
#define CLOCK_GETTIME
int debug;
char progname[10];
double sys_residual;
double average;
void sys_gettime(l_fp *);
int
main(
int argc,
char *argv[]
)
{
l_fp tr;
int i, j;
double dtemp, gtod[NBUF];
for (i = 0; i < NBUF; i ++)
gtod[i] = 0;
for (i = 0; i < NBUF; i ++) {
get_systime(&tr);
LFPTOD(&tr, gtod[i]);
}
average = 0;
for (i = 0; i < NBUF - 2; i++) {
gtod[i] = gtod[i + 1] - gtod[i];
printf("%13.9f\n", gtod[i]);
average += gtod[i];
}
for (i = 0; i < NBUF - 2; i++) {
for (j = 0; j <= i; j++) {
if (gtod[j] > gtod[i]) {
dtemp = gtod[j];
gtod[j] = gtod[i];
gtod[i] = dtemp;
}
}
}
average = average / (NBUF - 2);
fprintf(stderr, "Average %13.9f\n", average);
fprintf(stderr, "First rank\n");
for (i = 0; i < 10; i++)
fprintf(stderr, "%2d %13.9f\n", i, gtod[i]);
fprintf(stderr, "Last rank\n");
for (i = NBUF - 12; i < NBUF - 2; i++)
fprintf(stderr, "%2d %13.9f\n", i, gtod[i]);
exit(0);
}
void
get_systime(
l_fp *now
)
{
double dtemp;
#if defined(HAVE_CLOCK_GETTIME) || defined(HAVE_GETCLOCK)
struct timespec ts;
# ifdef HAVE_CLOCK_GETTIME
clock_gettime(CLOCK_REALTIME, &ts);
# else
getclock(TIMEOFDAY, &ts);
# endif
now->l_i = ts.tv_sec + JAN_1970;
dtemp = ts.tv_nsec / 1e9;
#else
struct timeval tv;
gettimeofday(&tv, NULL);
now->l_i = tv.tv_sec + JAN_1970;
dtemp = tv.tv_usec / 1e6;
#endif
dtemp += sys_residual;
if (dtemp >= 1) {
dtemp -= 1;
now->l_i++;
} else if (dtemp < -1) {
dtemp += 1;
now->l_i--;
}
dtemp *= FRAC;
now->l_uf = (u_int32)dtemp;
}