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Tcache: make slot sizing configurable.

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This commit is contained in:
David Goldblatt
2020-05-11 15:03:06 -07:00
committed by David Goldblatt
parent b58dea8d1b
commit 181093173d
5 changed files with 59 additions and 30 deletions
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8
include/jemalloc/internal/tcache_externs.h
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@@ -1,9 +1,13 @@
#ifndef JEMALLOC_INTERNAL_TCACHE_EXTERNS_H
#define JEMALLOC_INTERNAL_TCACHE_EXTERNS_H
extern bool opt_tcache;
extern ssize_t opt_lg_tcache_max;
extern bool opt_tcache;
extern ssize_t opt_lg_tcache_max;
extern ssize_t opt_lg_tcache_nslots_mul;
extern unsigned opt_tcache_nslots_small_min;
extern unsigned opt_tcache_nslots_small_max;
extern unsigned opt_tcache_nslots_large;
extern ssize_t opt_lg_tcache_shift;
/*
* Number of tcache bins. There are SC_NBINS small-object bins, plus 0 or more

17
include/jemalloc/internal/tcache_types.h
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@@ -17,23 +17,6 @@ typedef struct tcaches_s tcaches_t;
#define TCACHE_STATE_PURGATORY ((tcache_t *)(uintptr_t)3)
#define TCACHE_STATE_MAX TCACHE_STATE_PURGATORY
/*
* Absolute minimum number of cache slots for each small bin.
*/
#define TCACHE_NSLOTS_SMALL_MIN 20
/*
* Absolute maximum number of cache slots for each small bin in the thread
* cache. This is an additional constraint beyond that imposed as: twice the
* number of regions per slab for this size class.
*
* This constant must be an even number.
*/
#define TCACHE_NSLOTS_SMALL_MAX 200
/* Number of cache slots for large size classes. */
#define TCACHE_NSLOTS_LARGE 20
/* (1U << opt_lg_tcache_max) is used to compute tcache_maxclass. */
#define LG_TCACHE_MAXCLASS_DEFAULT 15