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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
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test/unit/prof_threshold_small.sh Normal file
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export MALLOC_CONF="experimental_lg_prof_threshold:22"