blob: e2a5a4087bcc9675b3b804d79e7ab9290305a8d7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
#ifndef JEMALLOC_INTERNAL_ARENA_STRUCTS_H
#define JEMALLOC_INTERNAL_ARENA_STRUCTS_H
#include "jemalloc/internal/arena_stats.h"
#include "jemalloc/internal/atomic.h"
#include "jemalloc/internal/bin.h"
#include "jemalloc/internal/bitmap.h"
#include "jemalloc/internal/counter.h"
#include "jemalloc/internal/ecache.h"
#include "jemalloc/internal/edata_cache.h"
#include "jemalloc/internal/extent_dss.h"
#include "jemalloc/internal/jemalloc_internal_types.h"
#include "jemalloc/internal/mutex.h"
#include "jemalloc/internal/nstime.h"
#include "jemalloc/internal/pa.h"
#include "jemalloc/internal/ql.h"
#include "jemalloc/internal/sc.h"
#include "jemalloc/internal/ticker.h"
struct arena_s {
/*
* Number of threads currently assigned to this arena. Each thread has
* two distinct assignments, one for application-serving allocation, and
* the other for internal metadata allocation. Internal metadata must
* not be allocated from arenas explicitly created via the arenas.create
* mallctl, because the arena.<i>.reset mallctl indiscriminately
* discards all allocations for the affected arena.
*
* 0: Application allocation.
* 1: Internal metadata allocation.
*
* Synchronization: atomic.
*/
atomic_u_t nthreads[2];
/* Next bin shard for binding new threads. Synchronization: atomic. */
atomic_u_t binshard_next;
/*
* When percpu_arena is enabled, to amortize the cost of reading /
* updating the current CPU id, track the most recent thread accessing
* this arena, and only read CPU if there is a mismatch.
*/
tsdn_t *last_thd;
/* Synchronization: internal. */
arena_stats_t stats;
/*
* Lists of tcaches and cache_bin_array_descriptors for extant threads
* associated with this arena. Stats from these are merged
* incrementally, and at exit if opt_stats_print is enabled.
*
* Synchronization: tcache_ql_mtx.
*/
ql_head(tcache_slow_t) tcache_ql;
ql_head(cache_bin_array_descriptor_t) cache_bin_array_descriptor_ql;
malloc_mutex_t tcache_ql_mtx;
/*
* Represents a dss_prec_t, but atomically.
*
* Synchronization: atomic.
*/
atomic_u_t dss_prec;
/*
* Extant large allocations.
*
* Synchronization: large_mtx.
*/
edata_list_active_t large;
/* Synchronizes all large allocation/update/deallocation. */
malloc_mutex_t large_mtx;
/* The page-level allocator shard this arena uses. */
pa_shard_t pa_shard;
/*
* A cached copy of base->ind. This can get accessed on hot paths;
* looking it up in base requires an extra pointer hop / cache miss.
*/
unsigned ind;
/*
* Base allocator, from which arena metadata are allocated.
*
* Synchronization: internal.
*/
base_t *base;
/* Used to determine uptime. Read-only after initialization. */
nstime_t create_time;
/*
* The arena is allocated alongside its bins; really this is a
* dynamically sized array determined by the binshard settings.
*/
bin_t bins[0];
};
#endif /* JEMALLOC_INTERNAL_ARENA_STRUCTS_H */
|
