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Refactor huge allocation to be managed by arenas.

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Refactor huge allocation to be managed by arenas (though the global
red-black tree of huge allocations remains for lookup during
deallocation).  This is the logical conclusion of recent changes that 1)
made per arena dss precedence apply to huge allocation, and 2) made it
possible to replace the per arena chunk allocation/deallocation
functions.

Remove the top level huge stats, and replace them with per arena huge
stats.

Normalize function names and types to *dalloc* (some were *dealloc*).

Remove the --enable-mremap option.  As jemalloc currently operates, this
is a performace regression for some applications, but planned work to
logarithmically space huge size classes should provide similar amortized
performance.  The motivation for this change was that mremap-based huge
reallocation forced leaky abstractions that prevented refactoring.
This commit is contained in:
Jason Evans
2014-05-15 22:22:27 -07:00
parent fb7fe50a88
commit e2deab7a75
28 changed files with 384 additions and 470 deletions
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20
include/jemalloc/internal/huge.h
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@@ -9,30 +9,18 @@
/******************************************************************************/
#ifdef JEMALLOC_H_EXTERNS
/* Huge allocation statistics. */
extern uint64_t huge_nmalloc;
extern uint64_t huge_ndalloc;
extern size_t huge_allocated;
/* Protects chunk-related data structures. */
extern malloc_mutex_t huge_mtx;
void *huge_malloc(arena_t *arena, size_t size, bool zero,
dss_prec_t dss_prec);
void *huge_palloc(arena_t *arena, size_t size, size_t alignment, bool zero,
dss_prec_t dss_prec);
void *huge_malloc(arena_t *arena, size_t size, bool zero);
void *huge_palloc(arena_t *arena, size_t size, size_t alignment, bool zero);
bool huge_ralloc_no_move(void *ptr, size_t oldsize, size_t size,
size_t extra);
void *huge_ralloc(arena_t *arena, void *ptr, size_t oldsize, size_t size,
size_t extra, size_t alignment, bool zero, bool try_tcache_dalloc,
dss_prec_t dss_prec);
size_t extra, size_t alignment, bool zero, bool try_tcache_dalloc);
#ifdef JEMALLOC_JET
typedef void (huge_dalloc_junk_t)(void *, size_t);
extern huge_dalloc_junk_t *huge_dalloc_junk;
#endif
void huge_dalloc(void *ptr, bool unmap);
void huge_dalloc(void *ptr);
size_t huge_salloc(const void *ptr);
dss_prec_t huge_dss_prec_get(arena_t *arena);
prof_ctx_t *huge_prof_ctx_get(const void *ptr);
void huge_prof_ctx_set(const void *ptr, prof_ctx_t *ctx);
bool huge_boot(void);