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