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      1 #include "test/jemalloc_test.h"
      2 
      3 void
      4 timer_start(timedelta_t *timer)
      5 {
      6 
      7 	nstime_init(&timer->t0, 0);
      8 	nstime_update(&timer->t0);
      9 }
     10 
     11 void
     12 timer_stop(timedelta_t *timer)
     13 {
     14 
     15 	nstime_copy(&timer->t1, &timer->t0);
     16 	nstime_update(&timer->t1);
     17 }
     18 
     19 uint64_t
     20 timer_usec(const timedelta_t *timer)
     21 {
     22 	nstime_t delta;
     23 
     24 	nstime_copy(&delta, &timer->t1);
     25 	nstime_subtract(&delta, &timer->t0);
     26 	return (nstime_ns(&delta) / 1000);
     27 }
     28 
     29 void
     30 timer_ratio(timedelta_t *a, timedelta_t *b, char *buf, size_t buflen)
     31 {
     32 	uint64_t t0 = timer_usec(a);
     33 	uint64_t t1 = timer_usec(b);
     34 	uint64_t mult;
     35 	size_t i = 0;
     36 	size_t j, n;
     37 
     38 	/* Whole. */
     39 	n = malloc_snprintf(&buf[i], buflen-i, "%"FMTu64, t0 / t1);
     40 	i += n;
     41 	if (i >= buflen)
     42 		return;
     43 	mult = 1;
     44 	for (j = 0; j < n; j++)
     45 		mult *= 10;
     46 
     47 	/* Decimal. */
     48 	n = malloc_snprintf(&buf[i], buflen-i, ".");
     49 	i += n;
     50 
     51 	/* Fraction. */
     52 	while (i < buflen-1) {
     53 		uint64_t round = (i+1 == buflen-1 && ((t0 * mult * 10 / t1) % 10
     54 		    >= 5)) ? 1 : 0;
     55 		n = malloc_snprintf(&buf[i], buflen-i,
     56 		    "%"FMTu64, (t0 * mult / t1) % 10 + round);
     57 		i += n;
     58 		mult *= 10;
     59 	}
     60 }
     61