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Removed CLOCK_MONOTONIC_COARSE support.

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While clock_gettime(CLOCK_MONOTONIC_COARSE) is faster than
clock_gettime(CLOCK_MONOTONIC), the latter is fast enough on Linux for
practical usage, and the difference is negligible compared to other costs
at each event loop iteration.  On the other hand, CLOCK_MONOTONIC_COARSE
causes various issues with typical CONFIG_HZ=250, notably very inaccurate
limit_rate handling in some edge cases (ticket #1678) and negative difference
between $request_time and $upstream_response_time (ticket #1965).
This commit is contained in:
Maxim Dounin committed 2021-10-21 18:38:38 +03:00
1 parent 1fecec0cbf
commit f29d7ade54
1 file changed
-4
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src/core/ngx_times.c
-4
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@@ -200,10 +200,6 @@ ngx_monotonic_time(time_t sec, ngx_uint_t msec)
#if defined(CLOCK_MONOTONIC_FAST) #if defined(CLOCK_MONOTONIC_FAST)
clock_gettime(CLOCK_MONOTONIC_FAST, &ts); clock_gettime(CLOCK_MONOTONIC_FAST, &ts);
#elif defined(CLOCK_MONOTONIC_COARSE)
clock_gettime(CLOCK_MONOTONIC_COARSE, &ts);
#else #else
clock_gettime(CLOCK_MONOTONIC, &ts); clock_gettime(CLOCK_MONOTONIC, &ts);
#endif #endif