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Imported Upstream version 1.9.0+dfsg1
[rustc.git] / src / jemalloc / test / src / timer.c
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 unsigned i = 0;
36 unsigned j;
37 int n;
38
39 /* Whole. */
40 n = malloc_snprintf(&buf[i], buflen-i, "%"FMTu64, t0 / t1);
41 i += n;
42 if (i >= buflen)
43 return;
44 mult = 1;
45 for (j = 0; j < n; j++)
46 mult *= 10;
47
48 /* Decimal. */
49 n = malloc_snprintf(&buf[i], buflen-i, ".");
50 i += n;
51
52 /* Fraction. */
53 while (i < buflen-1) {
54 uint64_t round = (i+1 == buflen-1 && ((t0 * mult * 10 / t1) % 10
55 >= 5)) ? 1 : 0;
56 n = malloc_snprintf(&buf[i], buflen-i,
57 "%"FMTu64, (t0 * mult / t1) % 10 + round);
58 i += n;
59 mult *= 10;
60 }
61 }