58 lines
1.0 KiB
C
58 lines
1.0 KiB
C
#include "test/jemalloc_test.h"
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void
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timer_start(timedelta_t *timer)
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{
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gettimeofday(&timer->tv0, NULL);
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}
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void
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timer_stop(timedelta_t *timer)
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{
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gettimeofday(&timer->tv1, NULL);
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}
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uint64_t
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timer_usec(const timedelta_t *timer)
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{
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return (((timer->tv1.tv_sec - timer->tv0.tv_sec) * 1000000) +
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timer->tv1.tv_usec - timer->tv0.tv_usec);
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}
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void
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timer_ratio(timedelta_t *a, timedelta_t *b, char *buf, size_t buflen)
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{
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uint64_t t0 = timer_usec(a);
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uint64_t t1 = timer_usec(b);
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uint64_t mult;
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unsigned i = 0;
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unsigned j;
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int n;
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/* Whole. */
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n = malloc_snprintf(&buf[i], buflen-i, "%"PRIu64, t0 / t1);
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i += n;
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if (i >= buflen)
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return;
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mult = 1;
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for (j = 0; j < n; j++)
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mult *= 10;
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/* Decimal. */
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n = malloc_snprintf(&buf[i], buflen-i, ".");
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i += n;
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/* Fraction. */
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while (i < buflen-1) {
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uint64_t round = (i+1 == buflen-1 && ((t0 * mult * 10 / t1) % 10
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>= 5)) ? 1 : 0;
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n = malloc_snprintf(&buf[i], buflen-i,
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"%"PRIu64, (t0 * mult / t1) % 10 + round);
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i += n;
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mult *= 10;
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}
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}
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