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Improve interval-based profile dump triggering.

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When an allocation is large enough to trigger multiple dumps, use
modular math rather than subtraction to reset the interval counter.
Prior to this change, it was possible for a single allocation to cause
many subsequent allocations to all trigger profile dumps.

When updating usable size for a sampled object, try to cancel out
the difference between LARGE_MINCLASS and usable size from the interval
counter.
This commit is contained in:
Jason Evans 2016-05-28 17:29:03 -07:00
parent ed2c2427a7
commit d28e5a6696
2 changed files with 15 additions and 1 deletions
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2
include/jemalloc/internal/arena.h
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@ -984,7 +984,7 @@ arena_prof_accum_impl(arena_t *arena, uint64_t accumbytes)
arena->prof_accumbytes += accumbytes;
if (arena->prof_accumbytes >= prof_interval) {
arena->prof_accumbytes -= prof_interval;
arena->prof_accumbytes %= prof_interval;
return (true);
}
return (false);