2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2005 Robert N. M. Watson
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8 * modification, are permitted provided that the following conditions
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31 #ifndef _MEMSTAT_INTERNAL_H_
32 #define _MEMSTAT_INTERNAL_H_
35 * memstat maintains its own internal notion of statistics on each memory
36 * type, common across UMA and kernel malloc. Some fields are straight from
37 * the allocator statistics, others are derived when extracted from the
38 * kernel. A struct memory_type will describe each type supported by an
39 * allocator. memory_type structures can be chained into lists.
43 * Static properties of type.
45 int mt_allocator; /* malloc(9), uma(9), etc. */
46 char mt_name[MEMTYPE_MAXNAME]; /* name of memory type. */
49 * (Relatively) static zone settings, that don't uniquely identify
50 * the zone, but also don't change much.
52 uint64_t mt_countlimit; /* 0, or maximum allocations. */
53 uint64_t mt_byteslimit; /* 0, or maximum bytes. */
54 uint64_t mt_sizemask; /* malloc: allocated size bitmask. */
55 uint64_t mt_size; /* uma: size of objects. */
56 uint64_t mt_rsize; /* uma: real size of objects. */
59 * Zone or type information that includes all caches and any central
60 * zone state. Depending on the allocator, this may be synthesized
61 * from several sources, or directly measured.
63 uint64_t mt_memalloced; /* Bytes allocated over life time. */
64 uint64_t mt_memfreed; /* Bytes freed over life time. */
65 uint64_t mt_numallocs; /* Allocations over life time. */
66 uint64_t mt_numfrees; /* Frees over life time. */
67 uint64_t mt_bytes; /* Bytes currently allocated. */
68 uint64_t mt_count; /* Number of current allocations. */
69 uint64_t mt_free; /* Number of cached free items. */
70 uint64_t mt_failures; /* Number of allocation failures. */
71 uint64_t mt_sleeps; /* Number of allocation sleeps. */
74 * Caller-owned memory.
76 void *mt_caller_pointer[MEMSTAT_MAXCALLER]; /* Pointers. */
77 uint64_t mt_caller_uint64[MEMSTAT_MAXCALLER]; /* Integers. */
80 * For allocators making use of per-CPU caches, we also provide raw
81 * statistics from the central allocator and each per-CPU cache,
82 * which (combined) sometimes make up the above general statistics.
84 * First, central zone/type state, all numbers excluding any items
85 * cached in per-CPU caches.
87 * XXXRW: Might be desirable to separately expose allocation stats
88 * from zone, which should (combined with per-cpu) add up to the
91 uint64_t mt_zonefree; /* Free items in zone. */
92 uint64_t mt_kegfree; /* Free items in keg. */
95 * Per-CPU measurements fall into two categories: per-CPU allocation,
96 * and per-CPU cache state.
98 struct mt_percpu_alloc_s {
99 uint64_t mtp_memalloced;/* Per-CPU mt_memalloced. */
100 uint64_t mtp_memfreed; /* Per-CPU mt_memfreed. */
101 uint64_t mtp_numallocs; /* Per-CPU mt_numallocs. */
102 uint64_t mtp_numfrees; /* Per-CPU mt_numfrees. */
103 uint64_t mtp_sizemask; /* Per-CPU mt_sizemask. */
104 void *mtp_caller_pointer[MEMSTAT_MAXCALLER];
105 uint64_t mtp_caller_uint64[MEMSTAT_MAXCALLER];
108 struct mt_percpu_cache_s {
109 uint64_t mtp_free; /* Per-CPU cache free items. */
112 LIST_ENTRY(memory_type) mt_list; /* List of types. */
116 * Description of struct memory_type_list is in memstat.h.
118 struct memory_type_list {
119 LIST_HEAD(, memory_type) mtl_list;
123 void _memstat_mtl_empty(struct memory_type_list *list);
124 struct memory_type *_memstat_mt_allocate(struct memory_type_list *list,
125 int allocator, const char *name, int maxcpus);
126 void _memstat_mt_reset_stats(struct memory_type *mtp,
129 #endif /* !_MEMSTAT_INTERNAL_H_ */