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📄 arena_externs.h(4.83 KB)
📄 arena_inlines_a.h(1.44 KB)
📄 arena_inlines_b.h(11.54 KB)
📄 arena_stats.h(7.92 KB)
📄 arena_structs_a.h(293 B)
📄 arena_structs_b.h(6.63 KB)
📄 arena_types.h(1.67 KB)
📄 assert.h(1.3 KB)
📄 atomic.h(2.66 KB)
📄 atomic_c11.h(3.46 KB)
📄 atomic_gcc_atomic.h(4.06 KB)
📄 atomic_gcc_sync.h(6.21 KB)
📄 background_thread_externs.h(1.29 KB)
📄 background_thread_inlines.h(2.09 KB)
📄 background_thread_structs.h(1.74 KB)
📄 base_externs.h(946 B)
📄 base_inlines.h(312 B)
📄 base_structs.h(1.52 KB)
📄 base_types.h(1.08 KB)
📄 bin.h(3.6 KB)
📄 bin_stats.h(1.35 KB)
📄 bin_types.h(474 B)
📄 bit_util.h(5.22 KB)
📄 bitmap.h(10.97 KB)
📄 cache_bin.h(3.69 KB)
📄 ckh.h(3.19 KB)
📄 ctl.h(3.62 KB)
📄 div.h(1.14 KB)
📄 emitter.h(13.06 KB)
📄 extent_dss.h(728 B)
📄 extent_externs.h(3.75 KB)
📄 extent_inlines.h(13.4 KB)
📄 extent_mmap.h(328 B)
📄 extent_structs.h(8.46 KB)
📄 extent_types.h(700 B)
📄 hash.h(7.88 KB)
📄 hook.h(5.41 KB)
📄 jemalloc_internal_decls.h(2.19 KB)
📄 jemalloc_internal_defs.h(10.93 KB)
📄 jemalloc_internal_defs_FreeBSD.h(256 B)
📄 jemalloc_internal_externs.h(1.75 KB)
📄 jemalloc_internal_includes.h(4.19 KB)
📄 jemalloc_internal_inlines_a.h(4.39 KB)
📄 jemalloc_internal_inlines_b.h(2.24 KB)
📄 jemalloc_internal_inlines_c.h(7.08 KB)
📄 jemalloc_internal_macros.h(3.99 KB)
📄 jemalloc_internal_types.h(3.42 KB)
📄 jemalloc_preamble.h(3.9 KB)
📄 large_externs.h(1.4 KB)
📄 log.h(3.67 KB)
📄 malloc_io.h(2.9 KB)
📄 mutex.h(9.34 KB)
📄 mutex_pool.h(2.81 KB)
📄 mutex_prof.h(3.55 KB)
📄 nstime.h(1.27 KB)
📄 pages.h(3.05 KB)
📄 ph.h(12.26 KB)
📄 private_namespace.h(22.72 KB)
📄 prng.h(4.69 KB)
📄 prof_externs.h(3.79 KB)
📄 prof_inlines_a.h(2.44 KB)
📄 prof_inlines_b.h(6.42 KB)
📄 prof_structs.h(5.02 KB)
📄 prof_types.h(1.74 KB)
📄 public_namespace.h(1.03 KB)
📄 ql.h(2.45 KB)
📄 qr.h(2.29 KB)
📄 quantum.h(1.75 KB)
📄 rb.h(37.41 KB)
📄 rtree.h(17.01 KB)
📄 rtree_tsd.h(1.82 KB)
📄 safety_check.h(797 B)
📄 sc.h(12.98 KB)
📄 seq.h(1.81 KB)
📄 smoothstep.h(15.26 KB)
📄 spin.h(613 B)
📄 stats.h(998 B)
📄 sz.h(7.96 KB)
📄 tcache_externs.h(2.09 KB)
📄 tcache_inlines.h(5.73 KB)
📄 tcache_structs.h(2.05 KB)
📄 tcache_types.h(2.01 KB)
📄 test_hooks.h(459 B)
📄 ticker.h(2.21 KB)
📄 tsd.h(12.49 KB)
📄 tsd_generic.h(3.76 KB)
📄 tsd_malloc_thread_cleanup.h(1.19 KB)
📄 tsd_tls.h(1.12 KB)
📄 tsd_types.h(258 B)
📄 util.h(1.43 KB)
📄 witness.h(9.32 KB)

Editing: cache_bin.h

#ifndef JEMALLOC_INTERNAL_CACHE_BIN_H
#define JEMALLOC_INTERNAL_CACHE_BIN_H

#include "jemalloc/internal/ql.h"

/*
 * The cache_bins are the mechanism that the tcache and the arena use to
 * communicate.  The tcache fills from and flushes to the arena by passing a
 * cache_bin_t to fill/flush.  When the arena needs to pull stats from the
 * tcaches associated with it, it does so by iterating over its
 * cache_bin_array_descriptor_t objects and reading out per-bin stats it
 * contains.  This makes it so that the arena need not know about the existence
 * of the tcache at all.
 */

/*
 * The count of the number of cached allocations in a bin.  We make this signed
 * so that negative numbers can encode "invalid" states (e.g. a low water mark
 * of -1 for a cache that has been depleted).
 */
typedef int32_t cache_bin_sz_t;

typedef struct cache_bin_stats_s cache_bin_stats_t;
struct cache_bin_stats_s {
	/*
	 * Number of allocation requests that corresponded to the size of this
	 * bin.
	 */
	uint64_t nrequests;
};

/*
 * Read-only information associated with each element of tcache_t's tbins array
 * is stored separately, mainly to reduce memory usage.
 */
typedef struct cache_bin_info_s cache_bin_info_t;
struct cache_bin_info_s {
	/* Upper limit on ncached. */
	cache_bin_sz_t ncached_max;
};

typedef struct cache_bin_s cache_bin_t;
struct cache_bin_s {
	/* Min # cached since last GC. */
	cache_bin_sz_t low_water;
	/* # of cached objects. */
	cache_bin_sz_t ncached;
	/*
	 * ncached and stats are both modified frequently.  Let's keep them
	 * close so that they have a higher chance of being on the same
	 * cacheline, thus less write-backs.
	 */
	cache_bin_stats_t tstats;
	/*
	 * Stack of available objects.
	 *
	 * To make use of adjacent cacheline prefetch, the items in the avail
	 * stack goes to higher address for newer allocations.  avail points
	 * just above the available space, which means that
	 * avail[-ncached, ... -1] are available items and the lowest item will
	 * be allocated first.
	 */
	void **avail;
};

typedef struct cache_bin_array_descriptor_s cache_bin_array_descriptor_t;
struct cache_bin_array_descriptor_s {
	/*
	 * The arena keeps a list of the cache bins associated with it, for
	 * stats collection.
	 */
	ql_elm(cache_bin_array_descriptor_t) link;
	/* Pointers to the tcache bins. */
	cache_bin_t *bins_small;
	cache_bin_t *bins_large;
};

static inline void
cache_bin_array_descriptor_init(cache_bin_array_descriptor_t *descriptor,
    cache_bin_t *bins_small, cache_bin_t *bins_large) {
	ql_elm_new(descriptor, link);
	descriptor->bins_small = bins_small;
	descriptor->bins_large = bins_large;
}

JEMALLOC_ALWAYS_INLINE void *
cache_bin_alloc_easy(cache_bin_t *bin, bool *success) {
	void *ret;

bin->ncached--;

/*
	 * Check for both bin->ncached == 0 and ncached < low_water
	 * in a single branch.
	 */
	if (unlikely(bin->ncached <= bin->low_water)) {
		bin->low_water = bin->ncached;
		if (bin->ncached == -1) {
			bin->ncached = 0;
			*success = false;
			return NULL;
		}
	}

/*
	 * success (instead of ret) should be checked upon the return of this
	 * function.  We avoid checking (ret == NULL) because there is never a
	 * null stored on the avail stack (which is unknown to the compiler),
	 * and eagerly checking ret would cause pipeline stall (waiting for the
	 * cacheline).
	 */
	*success = true;
	ret = *(bin->avail - (bin->ncached + 1));

return ret;
}

JEMALLOC_ALWAYS_INLINE bool
cache_bin_dalloc_easy(cache_bin_t *bin, cache_bin_info_t *bin_info, void *ptr) {
	if (unlikely(bin->ncached == bin_info->ncached_max)) {
		return false;
	}
	assert(bin->ncached < bin_info->ncached_max);
	bin->ncached++;
	*(bin->avail - bin->ncached) = ptr;

return true;
}

#endif /* JEMALLOC_INTERNAL_CACHE_BIN_H */

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Editing: cache_bin.h

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