void dump_hist_stats (void)
{
double minavg, maxavg, avgavg;
/* max is last, where its visible w/o scrolling */
minavg = dump_histogram (histogram_min, "min");
avgavg = dump_histogram (histogram_avg, "avg");
maxavg = dump_histogram (histogram_max, "max");
fprintf(stderr,"HSH|--param|--samples-|--average--|---stddev--\n");
dump_stats (histogram_min, "min", minavg);
dump_stats (histogram_avg, "avg", avgavg);
dump_stats (histogram_max, "max", maxavg);
}
int main(int ac, char **av)
{
Image *img;
int *histogram;
InitializeMagick("./");
img = get_image_from_path(av[1]);
img = get_grayscale_image(img);
histogram = create_histogram(img);
dump_histogram(histogram, av[2]);
dump_image(img, "./", "gray", "jpeg");
return (0);
}
void worker(void *cookie)
{
long long minj = 10000000, maxj = -10000000, dt, sumj = 0;
unsigned long long count = 0;
int err, n;
err = rt_sem_create(&switch_sem, "dispsem", 0, S_FIFO);
if (err) {
fprintf(stderr,"switch: cannot create semaphore: %s\n",
strerror(-err));
return;
}
for (n=0; n<nsamples; n++) {
err = rt_sem_p(&switch_sem, TM_INFINITE);
if (err) {
if (err != -EIDRM)
fprintf(stderr,"switch: failed to pend on semaphore, code %d\n", err);
rt_task_delete(NULL);
}
if (++count != switch_count) {
count = switch_count;
lost++;
continue;
}
// First few switches are slow.
// Probably due to the Linux <-> RT context migration at task startup.
if (count < ignore)
continue;
dt = (long) (rt_timer_tsc() - switch_tsc);
if (dt > maxj)
maxj = dt;
if (dt < minj)
minj = dt;
sumj += dt;
if (do_histogram)
add_histogram(dt);
}
rt_sem_delete(&switch_sem);
minjitter = minj;
maxjitter = maxj;
avgjitter = sumj / n;
printf("RTH|%12s|%12s|%12s|%12s\n",
"lat min", "lat avg", "lat max", "lost");
printf("RTD|%12.3f|%12.3f|%12.3f|%12lld\n",
rt_timer_tsc2ns(minjitter) / 1000.0,
rt_timer_tsc2ns(avgjitter) / 1000.0,
rt_timer_tsc2ns(maxjitter) / 1000.0, lost);
if (do_histogram)
dump_histogram();
exit(0);
}
static void worker(void *cookie)
{
long long minj = 10000000, maxj = -10000000, dt, sumj = 0;
unsigned long long count = 0;
int err, n;
err = rt_sem_create(&switch_sem, "dispsem", 0, S_FIFO);
if (err) {
warning("failed to create semaphore (%s)\n",
symerror(err));
return;
}
for (n = 0; n < nsamples; n++) {
err = rt_sem_p(&switch_sem, TM_INFINITE);
if (err) {
if (err != -EIDRM && err != -EINVAL)
warning("failed to pend on semaphore (%s)\n",
symerror(err));
exit(EXIT_FAILURE);
}
dt = (long) (rt_timer_tsc() - switch_tsc);
if (switch_count - count > 1) {
lost += switch_count - count;
count = switch_count;
continue;
}
if (++count < warmup)
continue;
if (dt > maxj)
maxj = dt;
if (dt < minj)
minj = dt;
sumj += dt;
if (do_histogram)
add_histogram(dt);
}
rt_sem_delete(&switch_sem);
minjitter = minj;
maxjitter = maxj;
avgjitter = sumj / n;
printf("RTH|%12s|%12s|%12s|%12s\n",
"lat min", "lat avg", "lat max", "lost");
printf("RTD|%12.3f|%12.3f|%12.3f|%12lld\n",
rt_timer_tsc2ns(minjitter) / 1000.0,
rt_timer_tsc2ns(avgjitter) / 1000.0,
rt_timer_tsc2ns(maxjitter) / 1000.0, lost);
if (late)
printf("LATE: %d\n", late);
if (do_histogram)
dump_histogram();
exit(0);
}
