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Refactor arena_is_auto.

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This commit is contained in:
Qi Wang 2018-06-01 15:06:36 -07:00 committed by Qi Wang
parent 94a88c26f4
commit 79522b2fc2
3 changed files with 10 additions and 4 deletions
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3
include/jemalloc/internal/jemalloc_internal_externs.h
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@ -25,6 +25,9 @@ extern unsigned ncpus;
/* Number of arenas used for automatic multiplexing of threads and arenas. */
extern unsigned narenas_auto;
/* Base index for manual arenas. */
extern unsigned manual_arena_base;
/*
* Arenas that are used to service external requests. Not all elements of the
* arenas array are necessarily used; arenas are created lazily as needed.

3
include/jemalloc/internal/jemalloc_internal_inlines_b.h
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@ -71,9 +71,8 @@ arena_ichoose(tsd_t *tsd, arena_t *arena) {
static inline bool
arena_is_auto(arena_t *arena) {
assert(narenas_auto > 0);
unsigned offset = (opt_huge_threshold != 0) ? 1 : 0;
return (arena_ind_get(arena) < narenas_auto + offset);
return (arena_ind_get(arena) < manual_arena_base);
}
JEMALLOC_ALWAYS_INLINE extent_t *

8
src/jemalloc.c
View File

@ -86,8 +86,10 @@ malloc_mutex_t arenas_lock;
JEMALLOC_ALIGNED(CACHELINE)
atomic_p_t arenas[MALLOCX_ARENA_LIMIT];
static atomic_u_t narenas_total; /* Use narenas_total_*(). */
static arena_t *a0; /* arenas[0]; read-only after initialization. */
unsigned narenas_auto; /* Read-only after initialization. */
/* Below three are read-only after initialization. */
static arena_t *a0; /* arenas[0]. */
unsigned narenas_auto;
unsigned manual_arena_base;
typedef enum {
malloc_init_uninitialized = 3,
@ -1322,6 +1324,7 @@ malloc_init_hard_a0_locked() {
* malloc_ncpus().
*/
narenas_auto = 1;
manual_arena_base = narenas_auto + 1;
memset(arenas, 0, sizeof(arena_t *) * narenas_auto);
/*
* Initialize one arena here. The rest are lazily created in
@ -1472,6 +1475,7 @@ malloc_init_narenas(void) {
if (arena_init_huge()) {
narenas_total_inc();
}
manual_arena_base = narenas_total_get();
return false;
}