04d8fcb745
Convert the nrequests field to be partially derived, and the curlextents to be fully derived, in order to reduce the number of stats updates needed during common operations. This change affects ndalloc stats during arena reset, because it is no longer possible to cancel out ndalloc effects (curlextents would become negative).
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
#ifndef JEMALLOC_INTERNAL_STATS_STRUCTS_H
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#define JEMALLOC_INTERNAL_STATS_STRUCTS_H
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struct tcache_bin_stats_s {
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/*
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* Number of allocation requests that corresponded to the size of this
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* bin.
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*/
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uint64_t nrequests;
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};
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struct malloc_bin_stats_s {
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/*
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* Total number of allocation/deallocation requests served directly by
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* the bin. Note that tcache may allocate an object, then recycle it
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* many times, resulting many increments to nrequests, but only one
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* each to nmalloc and ndalloc.
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*/
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uint64_t nmalloc;
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uint64_t ndalloc;
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/*
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* Number of allocation requests that correspond to the size of this
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* bin. This includes requests served by tcache, though tcache only
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* periodically merges into this counter.
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*/
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uint64_t nrequests;
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/*
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* Current number of regions of this size class, including regions
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* currently cached by tcache.
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*/
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size_t curregs;
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/* Number of tcache fills from this bin. */
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uint64_t nfills;
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/* Number of tcache flushes to this bin. */
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uint64_t nflushes;
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/* Total number of slabs created for this bin's size class. */
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uint64_t nslabs;
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/*
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* Total number of slabs reused by extracting them from the slabs heap
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* for this bin's size class.
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*/
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uint64_t reslabs;
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/* Current number of slabs in this bin. */
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size_t curslabs;
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};
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struct malloc_large_stats_s {
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/*
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* Total number of allocation/deallocation requests served directly by
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* the arena.
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*/
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uint64_t nmalloc;
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uint64_t ndalloc;
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/*
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* Number of allocation requests that correspond to this size class.
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* This includes requests served by tcache, though tcache only
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* periodically merges into this counter.
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*/
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uint64_t nrequests; /* Partially derived. */
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/* Current number of allocations of this size class. */
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size_t curlextents; /* Derived. */
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};
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/*
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* Arena stats. Note that fields marked "derived" are not directly maintained
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* within the arena code; rather their values are derived during stats merge
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* requests.
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*/
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struct arena_stats_s {
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#ifndef JEMALLOC_ATOMIC_U64
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malloc_mutex_t mtx;
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#endif
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/* Number of bytes currently mapped, excluding retained memory. */
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size_t mapped; /* Partially derived. */
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/*
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* Number of bytes currently retained as a side effect of munmap() being
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* disabled/bypassed. Retained bytes are technically mapped (though
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* always decommitted or purged), but they are excluded from the mapped
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* statistic (above).
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*/
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size_t retained; /* Derived. */
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/*
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* Total number of purge sweeps, total number of madvise calls made,
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* and total pages purged in order to keep dirty unused memory under
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* control.
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*/
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uint64_t npurge;
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uint64_t nmadvise;
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uint64_t purged;
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size_t base; /* Derived. */
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size_t internal;
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size_t resident; /* Derived. */
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size_t allocated_large; /* Derived. */
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uint64_t nmalloc_large; /* Derived. */
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uint64_t ndalloc_large; /* Derived. */
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uint64_t nrequests_large; /* Derived. */
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/* Number of bytes cached in tcache associated with this arena. */
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size_t tcache_bytes; /* Derived. */
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/* One element for each large size class. */
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malloc_large_stats_t lstats[NSIZES - NBINS];
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};
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#endif /* JEMALLOC_INTERNAL_STATS_STRUCTS_H */
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