server-skynet-source-3rd-je.../include/jemalloc/internal/arena_stats.h
2018-04-16 13:50:21 -07:00

238 lines
6.7 KiB
C

#ifndef JEMALLOC_INTERNAL_ARENA_STATS_H
#define JEMALLOC_INTERNAL_ARENA_STATS_H
#include "jemalloc/internal/atomic.h"
#include "jemalloc/internal/mutex.h"
#include "jemalloc/internal/mutex_prof.h"
#include "jemalloc/internal/size_classes.h"
/*
* In those architectures that support 64-bit atomics, we use atomic updates for
* our 64-bit values. Otherwise, we use a plain uint64_t and synchronize
* externally.
*/
#ifdef JEMALLOC_ATOMIC_U64
typedef atomic_u64_t arena_stats_u64_t;
#else
/* Must hold the arena stats mutex while reading atomically. */
typedef uint64_t arena_stats_u64_t;
#endif
typedef struct arena_stats_large_s arena_stats_large_t;
struct arena_stats_large_s {
/*
* Total number of allocation/deallocation requests served directly by
* the arena.
*/
arena_stats_u64_t nmalloc;
arena_stats_u64_t ndalloc;
/*
* Number of allocation requests that correspond to this size class.
* This includes requests served by tcache, though tcache only
* periodically merges into this counter.
*/
arena_stats_u64_t nrequests; /* Partially derived. */
/* Current number of allocations of this size class. */
size_t curlextents; /* Derived. */
};
typedef struct arena_stats_decay_s arena_stats_decay_t;
struct arena_stats_decay_s {
/* Total number of purge sweeps. */
arena_stats_u64_t npurge;
/* Total number of madvise calls made. */
arena_stats_u64_t nmadvise;
/* Total number of pages purged. */
arena_stats_u64_t purged;
};
/*
* Arena stats. Note that fields marked "derived" are not directly maintained
* within the arena code; rather their values are derived during stats merge
* requests.
*/
typedef struct arena_stats_s arena_stats_t;
struct arena_stats_s {
#ifndef JEMALLOC_ATOMIC_U64
malloc_mutex_t mtx;
#endif
/* Number of bytes currently mapped, excluding retained memory. */
atomic_zu_t mapped; /* Partially derived. */
/*
* Number of unused virtual memory bytes currently retained. Retained
* bytes are technically mapped (though always decommitted or purged),
* but they are excluded from the mapped statistic (above).
*/
atomic_zu_t retained; /* Derived. */
arena_stats_decay_t decay_dirty;
arena_stats_decay_t decay_muzzy;
atomic_zu_t base; /* Derived. */
atomic_zu_t internal;
atomic_zu_t resident; /* Derived. */
atomic_zu_t metadata_thp;
atomic_zu_t allocated_large; /* Derived. */
arena_stats_u64_t nmalloc_large; /* Derived. */
arena_stats_u64_t ndalloc_large; /* Derived. */
arena_stats_u64_t nrequests_large; /* Derived. */
/* Number of bytes cached in tcache associated with this arena. */
atomic_zu_t tcache_bytes; /* Derived. */
mutex_prof_data_t mutex_prof_data[mutex_prof_num_arena_mutexes];
/* One element for each large size class. */
arena_stats_large_t lstats[NSIZES - NBINS];
/* Arena uptime. */
nstime_t uptime;
};
static inline bool
arena_stats_init(UNUSED tsdn_t *tsdn, arena_stats_t *arena_stats) {
if (config_debug) {
for (size_t i = 0; i < sizeof(arena_stats_t); i++) {
assert(((char *)arena_stats)[i] == 0);
}
}
#ifndef JEMALLOC_ATOMIC_U64
if (malloc_mutex_init(&arena_stats->mtx, "arena_stats",
WITNESS_RANK_ARENA_STATS, malloc_mutex_rank_exclusive)) {
return true;
}
#endif
/* Memory is zeroed, so there is no need to clear stats. */
return false;
}
static inline void
arena_stats_lock(tsdn_t *tsdn, arena_stats_t *arena_stats) {
#ifndef JEMALLOC_ATOMIC_U64
malloc_mutex_lock(tsdn, &arena_stats->mtx);
#endif
}
static inline void
arena_stats_unlock(tsdn_t *tsdn, arena_stats_t *arena_stats) {
#ifndef JEMALLOC_ATOMIC_U64
malloc_mutex_unlock(tsdn, &arena_stats->mtx);
#endif
}
static inline uint64_t
arena_stats_read_u64(tsdn_t *tsdn, arena_stats_t *arena_stats,
arena_stats_u64_t *p) {
#ifdef JEMALLOC_ATOMIC_U64
return atomic_load_u64(p, ATOMIC_RELAXED);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
return *p;
#endif
}
static inline void
arena_stats_add_u64(tsdn_t *tsdn, arena_stats_t *arena_stats,
arena_stats_u64_t *p, uint64_t x) {
#ifdef JEMALLOC_ATOMIC_U64
atomic_fetch_add_u64(p, x, ATOMIC_RELAXED);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
*p += x;
#endif
}
UNUSED static inline void
arena_stats_sub_u64(tsdn_t *tsdn, arena_stats_t *arena_stats,
arena_stats_u64_t *p, uint64_t x) {
#ifdef JEMALLOC_ATOMIC_U64
UNUSED uint64_t r = atomic_fetch_sub_u64(p, x, ATOMIC_RELAXED);
assert(r - x <= r);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
*p -= x;
assert(*p + x >= *p);
#endif
}
/*
* Non-atomically sets *dst += src. *dst needs external synchronization.
* This lets us avoid the cost of a fetch_add when its unnecessary (note that
* the types here are atomic).
*/
static inline void
arena_stats_accum_u64(arena_stats_u64_t *dst, uint64_t src) {
#ifdef JEMALLOC_ATOMIC_U64
uint64_t cur_dst = atomic_load_u64(dst, ATOMIC_RELAXED);
atomic_store_u64(dst, src + cur_dst, ATOMIC_RELAXED);
#else
*dst += src;
#endif
}
static inline size_t
arena_stats_read_zu(tsdn_t *tsdn, arena_stats_t *arena_stats, atomic_zu_t *p) {
#ifdef JEMALLOC_ATOMIC_U64
return atomic_load_zu(p, ATOMIC_RELAXED);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
return atomic_load_zu(p, ATOMIC_RELAXED);
#endif
}
static inline void
arena_stats_add_zu(tsdn_t *tsdn, arena_stats_t *arena_stats, atomic_zu_t *p,
size_t x) {
#ifdef JEMALLOC_ATOMIC_U64
atomic_fetch_add_zu(p, x, ATOMIC_RELAXED);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
size_t cur = atomic_load_zu(p, ATOMIC_RELAXED);
atomic_store_zu(p, cur + x, ATOMIC_RELAXED);
#endif
}
static inline void
arena_stats_sub_zu(tsdn_t *tsdn, arena_stats_t *arena_stats, atomic_zu_t *p,
size_t x) {
#ifdef JEMALLOC_ATOMIC_U64
UNUSED size_t r = atomic_fetch_sub_zu(p, x, ATOMIC_RELAXED);
assert(r - x <= r);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
size_t cur = atomic_load_zu(p, ATOMIC_RELAXED);
atomic_store_zu(p, cur - x, ATOMIC_RELAXED);
#endif
}
/* Like the _u64 variant, needs an externally synchronized *dst. */
static inline void
arena_stats_accum_zu(atomic_zu_t *dst, size_t src) {
size_t cur_dst = atomic_load_zu(dst, ATOMIC_RELAXED);
atomic_store_zu(dst, src + cur_dst, ATOMIC_RELAXED);
}
static inline void
arena_stats_large_nrequests_add(tsdn_t *tsdn, arena_stats_t *arena_stats,
szind_t szind, uint64_t nrequests) {
arena_stats_lock(tsdn, arena_stats);
arena_stats_add_u64(tsdn, arena_stats, &arena_stats->lstats[szind -
NBINS].nrequests, nrequests);
arena_stats_unlock(tsdn, arena_stats);
}
static inline void
arena_stats_mapped_add(tsdn_t *tsdn, arena_stats_t *arena_stats, size_t size) {
arena_stats_lock(tsdn, arena_stats);
arena_stats_add_zu(tsdn, arena_stats, &arena_stats->mapped, size);
arena_stats_unlock(tsdn, arena_stats);
}
#endif /* JEMALLOC_INTERNAL_ARENA_STATS_H */