35 lines
1.1 KiB
C
35 lines
1.1 KiB
C
#ifndef JEMALLOC_INTERNAL_COUNTER_H
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#define JEMALLOC_INTERNAL_COUNTER_H
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#include "jemalloc/internal/mutex.h"
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typedef struct counter_accum_s {
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LOCKEDINT_MTX_DECLARE(mtx)
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locked_u64_t accumbytes;
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uint64_t interval;
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} counter_accum_t;
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JEMALLOC_ALWAYS_INLINE bool
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counter_accum(tsdn_t *tsdn, counter_accum_t *counter, uint64_t bytes) {
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uint64_t interval = counter->interval;
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assert(interval > 0);
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LOCKEDINT_MTX_LOCK(tsdn, counter->mtx);
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/*
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* If the event moves fast enough (and/or if the event handling is slow
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* enough), extreme overflow can cause counter trigger coalescing.
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* This is an intentional mechanism that avoids rate-limiting
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* allocation.
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*/
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bool overflow = locked_inc_mod_u64(tsdn, LOCKEDINT_MTX(counter->mtx),
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&counter->accumbytes, bytes, interval);
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LOCKEDINT_MTX_UNLOCK(tsdn, counter->mtx);
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return overflow;
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}
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bool counter_accum_init(counter_accum_t *counter, uint64_t interval);
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void counter_prefork(tsdn_t *tsdn, counter_accum_t *counter);
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void counter_postfork_parent(tsdn_t *tsdn, counter_accum_t *counter);
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void counter_postfork_child(tsdn_t *tsdn, counter_accum_t *counter);
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#endif /* JEMALLOC_INTERNAL_COUNTER_H */
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