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Add more documentation to decay.c

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It took me a while to understand why some things are implemented the way they
are, so hopefully it will help future readers.
This commit is contained in:
Alex Lapenkou 2021-07-20 13:22:05 -07:00 • committed by Qi Wang
parent 4b633b9a81
commit aaea4fd1e6
2 changed files with 23 additions and 1 deletions
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3
include/jemalloc/internal/decay.h
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@ -149,7 +149,8 @@ bool decay_maybe_advance_epoch(decay_t *decay, nstime_t *new_time,
size_t current_npages);
/*
* Calculates wait time until at least npages_threshold pages should be purged.
* Calculates wait time until a number of pages in the interval
* [0.5 * npages_threshold .. 1.5 * npages_threshold] should be purged.
*
* Returns number of nanoseconds or DECAY_UNBOUNDED_TIME_TO_PURGE in case of
* indefinite wait.