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tcache_structs.h revision 1.1 
      1 #ifndef JEMALLOC_INTERNAL_TCACHE_STRUCTS_H
      2 #define JEMALLOC_INTERNAL_TCACHE_STRUCTS_H
      3 
      4 #include "jemalloc/internal/ql.h"
      5 #include "jemalloc/internal/size_classes.h"
      6 #include "jemalloc/internal/cache_bin.h"
      7 #include "jemalloc/internal/ticker.h"
      8 
      9 struct tcache_s {
     10 	/*
     11 	 * To minimize our cache-footprint, we put the frequently accessed data
     12 	 * together at the start of this struct.
     13 	 */
     14 
     15 	/* Cleared after arena_prof_accum(). */
     16 	uint64_t	prof_accumbytes;
     17 	/* Drives incremental GC. */
     18 	ticker_t	gc_ticker;
     19 	/*
     20 	 * The pointer stacks associated with bins follow as a contiguous array.
     21 	 * During tcache initialization, the avail pointer in each element of
     22 	 * tbins is initialized to point to the proper offset within this array.
     23 	 */
     24 	cache_bin_t	bins_small[NBINS];
     25 
     26 	/*
     27 	 * This data is less hot; we can be a little less careful with our
     28 	 * footprint here.
     29 	 */
     30 	/* Lets us track all the tcaches in an arena. */
     31 	ql_elm(tcache_t) link;
     32 	/*
     33 	 * The descriptor lets the arena find our cache bins without seeing the
     34 	 * tcache definition.  This enables arenas to aggregate stats across
     35 	 * tcaches without having a tcache dependency.
     36 	 */
     37 	cache_bin_array_descriptor_t cache_bin_array_descriptor;
     38 
     39 	/* The arena this tcache is associated with. */
     40 	arena_t		*arena;
     41 	/* Next bin to GC. */
     42 	szind_t		next_gc_bin;
     43 	/* For small bins, fill (ncached_max >> lg_fill_div). */
     44 	uint8_t		lg_fill_div[NBINS];
     45 	/*
     46 	 * We put the cache bins for large size classes at the end of the
     47 	 * struct, since some of them might not get used.  This might end up
     48 	 * letting us avoid touching an extra page if we don't have to.
     49 	 */
     50 	cache_bin_t	bins_large[NSIZES-NBINS];
     51 };
     52 
     53 /* Linkage for list of available (previously used) explicit tcache IDs. */
     54 struct tcaches_s {
     55 	union {
     56 		tcache_t	*tcache;
     57 		tcaches_t	*next;
     58 	};
     59 };
     60 
     61 #endif /* JEMALLOC_INTERNAL_TCACHE_STRUCTS_H */
     62