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Unlike prof_sample which is supported only with profiling mode active, prof_threshold is intended to be an always-supported allocation callback with much less overhead. The usage of the threshold allows performance critical callers to change program execution based on the callback: e.g. drop caches when memory becomes high or to predict the program is about to OOM ahead of time using peak memory watermarks.

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Shai Duvdevani 2025-01-29 15:25:10 -08:00 • committed by Qi Wang
parent ef8e512e29
commit 257e64b968
22 changed files with 246 additions and 0 deletions
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2
include/jemalloc/internal/tsd_internals.h
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@ -72,6 +72,7 @@ typedef ql_elm(tsd_t) tsd_link_t;
O(tcache_gc_dalloc_event_wait, uint64_t, uint64_t) \
O(prof_sample_event_wait, uint64_t, uint64_t) \
O(prof_sample_last_event, uint64_t, uint64_t) \
O(prof_threshold_event_wait, uint64_t, uint64_t) \
O(stats_interval_event_wait, uint64_t, uint64_t) \
O(stats_interval_last_event, uint64_t, uint64_t) \
O(peak_alloc_event_wait, uint64_t, uint64_t) \
@ -105,6 +106,7 @@ typedef ql_elm(tsd_t) tsd_link_t;
/* tcache_gc_dalloc_event_wait */ 0, \
/* prof_sample_event_wait */ 0, \
/* prof_sample_last_event */ 0, \
/* prof_threshold_event_wait */ 0, \
/* stats_interval_event_wait */ 0, \
/* stats_interval_last_event */ 0, \
/* peak_alloc_event_wait */ 0, \