f044bb219e
Recent changes have improved huge allocation scalability, which removes upward pressure to set the chunk size so large that huge allocations are rare. Smaller chunks are more likely to completely drain, so set the default to the smallest size that doesn't leave excessive unusable trailing space in chunk headers.
84 lines
2.8 KiB
C
84 lines
2.8 KiB
C
/******************************************************************************/
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#ifdef JEMALLOC_H_TYPES
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/*
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* Size and alignment of memory chunks that are allocated by the OS's virtual
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* memory system.
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*/
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#define LG_CHUNK_DEFAULT 18
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/* Return the chunk address for allocation address a. */
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#define CHUNK_ADDR2BASE(a) \
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((void *)((uintptr_t)(a) & ~chunksize_mask))
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/* Return the chunk offset of address a. */
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#define CHUNK_ADDR2OFFSET(a) \
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((size_t)((uintptr_t)(a) & chunksize_mask))
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/* Return the smallest chunk multiple that is >= s. */
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#define CHUNK_CEILING(s) \
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(((s) + chunksize_mask) & ~chunksize_mask)
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#endif /* JEMALLOC_H_TYPES */
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/******************************************************************************/
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#ifdef JEMALLOC_H_STRUCTS
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#endif /* JEMALLOC_H_STRUCTS */
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/******************************************************************************/
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#ifdef JEMALLOC_H_EXTERNS
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extern size_t opt_lg_chunk;
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extern const char *opt_dss;
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extern rtree_t chunks_rtree;
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extern size_t chunksize;
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extern size_t chunksize_mask; /* (chunksize - 1). */
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extern size_t chunk_npages;
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bool chunk_register(const void *chunk, const extent_node_t *node);
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void chunk_deregister(const void *chunk, const extent_node_t *node);
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void *chunk_alloc_base(size_t size);
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void *chunk_alloc_cache(arena_t *arena, void *new_addr, size_t size,
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size_t alignment, bool *zero, bool dalloc_node);
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void *chunk_alloc_default(void *new_addr, size_t size, size_t alignment,
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bool *zero, unsigned arena_ind);
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void *chunk_alloc_wrapper(arena_t *arena, chunk_alloc_t *chunk_alloc,
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void *new_addr, size_t size, size_t alignment, bool *zero);
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void chunk_record(arena_t *arena, extent_tree_t *chunks_szad,
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extent_tree_t *chunks_ad, bool cache, void *chunk, size_t size,
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bool zeroed);
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void chunk_dalloc_cache(arena_t *arena, void *chunk, size_t size);
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void chunk_dalloc_arena(arena_t *arena, void *chunk, size_t size,
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bool zeroed);
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bool chunk_dalloc_default(void *chunk, size_t size, unsigned arena_ind);
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void chunk_dalloc_wrapper(arena_t *arena, chunk_dalloc_t *chunk_dalloc,
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void *chunk, size_t size);
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bool chunk_boot(void);
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void chunk_prefork(void);
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void chunk_postfork_parent(void);
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void chunk_postfork_child(void);
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#endif /* JEMALLOC_H_EXTERNS */
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/******************************************************************************/
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#ifdef JEMALLOC_H_INLINES
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#ifndef JEMALLOC_ENABLE_INLINE
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extent_node_t *chunk_lookup(const void *chunk);
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#endif
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#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_CHUNK_C_))
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JEMALLOC_INLINE extent_node_t *
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chunk_lookup(const void *chunk)
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{
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return (rtree_get(&chunks_rtree, (uintptr_t)chunk));
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}
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#endif
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#endif /* JEMALLOC_H_INLINES */
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/******************************************************************************/
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#include "jemalloc/internal/chunk_dss.h"
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#include "jemalloc/internal/chunk_mmap.h"
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