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PA: Add a stats comment.

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David Goldblatt 2020-03-09 11:26:15 -07:00 committed by David Goldblatt
parent ce8c0d6c09
commit 6ca918d0cf
1 changed files with 11 additions and 0 deletions
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include/jemalloc/internal/pa.h
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@ -10,6 +10,17 @@
* allocations. * allocations.
*/ */
/*
* The stats for a particular pa_shard. Because of the way the ctl module
* handles stats epoch data collection (it has its own arena_stats, and merges
* the stats from each arena into it), this needs to live in the arena_stats_t;
* hence we define it here and let the pa_shard have a pointer (rather than the
* more natural approach of just embedding it in the pa_shard itself).
*
* We follow the arena_stats_t approach of marking the derived fields. These
* are the ones that are not maintained on their own; instead, their values are
* derived during those stats merges.
*/
typedef struct pa_shard_decay_stats_s pa_shard_decay_stats_t; typedef struct pa_shard_decay_stats_s pa_shard_decay_stats_t;
struct pa_shard_decay_stats_s { struct pa_shard_decay_stats_s {
/* Total number of purge sweeps. */ /* Total number of purge sweeps. */