1 #ifndef JEMALLOC_INTERNAL_TCACHE_STRUCTS_H
2 #define JEMALLOC_INTERNAL_TCACHE_STRUCTS_H
3 
4 #include "jemalloc/internal/cache_bin.h"
5 #include "jemalloc/internal/ql.h"
6 #include "jemalloc/internal/sc.h"
7 #include "jemalloc/internal/ticker.h"
8 #include "jemalloc/internal/tsd_types.h"
9 
10 /* Various uses of this struct need it to be a named type. */
11 typedef ql_elm(tsd_t) tsd_link_t;
12 
13 struct tcache_s {
14 	/*
15 	 * To minimize our cache-footprint, we put the frequently accessed data
16 	 * together at the start of this struct.
17 	 */
18 
19 	/* Cleared after arena_prof_accum(). */
20 	uint64_t	prof_accumbytes;
21 	/* Drives incremental GC. */
22 	ticker_t	gc_ticker;
23 	/*
24 	 * The pointer stacks associated with bins follow as a contiguous array.
25 	 * During tcache initialization, the avail pointer in each element of
26 	 * tbins is initialized to point to the proper offset within this array.
27 	 */
28 	cache_bin_t	bins_small[SC_NBINS];
29 
30 	/*
31 	 * This data is less hot; we can be a little less careful with our
32 	 * footprint here.
33 	 */
34 	/* Lets us track all the tcaches in an arena. */
35 	ql_elm(tcache_t) link;
36 
37 	/* Logically scoped to tsd, but put here for cache layout reasons. */
38 	ql_elm(tsd_t) tsd_link;
39 	bool in_hook;
40 
41 	/*
42 	 * The descriptor lets the arena find our cache bins without seeing the
43 	 * tcache definition.  This enables arenas to aggregate stats across
44 	 * tcaches without having a tcache dependency.
45 	 */
46 	cache_bin_array_descriptor_t cache_bin_array_descriptor;
47 
48 	/* The arena this tcache is associated with. */
49 	arena_t		*arena;
50 	/* Next bin to GC. */
51 	szind_t		next_gc_bin;
52 	/* For small bins, fill (ncached_max >> lg_fill_div). */
53 	uint8_t		lg_fill_div[SC_NBINS];
54 	/*
55 	 * We put the cache bins for large size classes at the end of the
56 	 * struct, since some of them might not get used.  This might end up
57 	 * letting us avoid touching an extra page if we don't have to.
58 	 */
59 	cache_bin_t	bins_large[SC_NSIZES-SC_NBINS];
60 };
61 
62 /* Linkage for list of available (previously used) explicit tcache IDs. */
63 struct tcaches_s {
64 	union {
65 		tcache_t	*tcache;
66 		tcaches_t	*next;
67 	};
68 };
69 
70 #endif /* JEMALLOC_INTERNAL_TCACHE_STRUCTS_H */
71