f3170baa30
This is the first step towards breaking up the tcache and arena (since they interact primarily at the bin level). It should also make a future arena caching implementation more straightforward.
164 lines
4.6 KiB
C
164 lines
4.6 KiB
C
#ifndef JEMALLOC_INTERNAL_STATS_H
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#define JEMALLOC_INTERNAL_STATS_H
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#include "jemalloc/internal/atomic.h"
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#include "jemalloc/internal/mutex_prof.h"
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#include "jemalloc/internal/mutex.h"
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#include "jemalloc/internal/size_classes.h"
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/* OPTION(opt, var_name, default, set_value_to) */
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#define STATS_PRINT_OPTIONS \
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OPTION('J', json, false, true) \
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OPTION('g', general, true, false) \
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OPTION('m', merged, config_stats, false) \
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OPTION('d', destroyed, config_stats, false) \
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OPTION('a', unmerged, config_stats, false) \
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OPTION('b', bins, true, false) \
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OPTION('l', large, true, false) \
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OPTION('x', mutex, true, false)
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enum {
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#define OPTION(o, v, d, s) stats_print_option_num_##v,
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STATS_PRINT_OPTIONS
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#undef OPTION
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stats_print_tot_num_options
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};
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/* Options for stats_print. */
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extern bool opt_stats_print;
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extern char opt_stats_print_opts[stats_print_tot_num_options+1];
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/* Implements je_malloc_stats_print. */
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void stats_print(void (*write_cb)(void *, const char *), void *cbopaque,
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const char *opts);
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/*
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* In those architectures that support 64-bit atomics, we use atomic updates for
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* our 64-bit values. Otherwise, we use a plain uint64_t and synchronize
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* externally.
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*/
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#ifdef JEMALLOC_ATOMIC_U64
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typedef atomic_u64_t arena_stats_u64_t;
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#else
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/* Must hold the arena stats mutex while reading atomically. */
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typedef uint64_t arena_stats_u64_t;
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#endif
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typedef 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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mutex_prof_data_t mutex_data;
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} malloc_bin_stats_t;
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typedef 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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arena_stats_u64_t nmalloc;
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arena_stats_u64_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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arena_stats_u64_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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} malloc_large_stats_t;
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typedef struct decay_stats_s {
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/* Total number of purge sweeps. */
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arena_stats_u64_t npurge;
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/* Total number of madvise calls made. */
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arena_stats_u64_t nmadvise;
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/* Total number of pages purged. */
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arena_stats_u64_t purged;
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} decay_stats_t;
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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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typedef 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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atomic_zu_t mapped; /* Partially derived. */
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/*
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* Number of unused virtual memory bytes currently retained. Retained
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* bytes are technically mapped (though always decommitted or purged),
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* but they are excluded from the mapped statistic (above).
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*/
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atomic_zu_t retained; /* Derived. */
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decay_stats_t decay_dirty;
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decay_stats_t decay_muzzy;
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atomic_zu_t base; /* Derived. */
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atomic_zu_t internal;
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atomic_zu_t resident; /* Derived. */
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atomic_zu_t allocated_large; /* Derived. */
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arena_stats_u64_t nmalloc_large; /* Derived. */
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arena_stats_u64_t ndalloc_large; /* Derived. */
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arena_stats_u64_t nrequests_large; /* Derived. */
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/* Number of bytes cached in tcache associated with this arena. */
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atomic_zu_t tcache_bytes; /* Derived. */
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mutex_prof_data_t mutex_prof_data[mutex_prof_num_arena_mutexes];
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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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/* Arena uptime. */
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nstime_t uptime;
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} arena_stats_t;
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#endif /* JEMALLOC_INTERNAL_STATS_H */
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