Add extent serial numbers.
Add extent serial numbers and use them where appropriate as a sort key that is higher priority than address, so that the allocation policy prefers older extents. This resolves #147.
This commit is contained in:
parent
c0a667112c
commit
a38acf716e
@ -130,7 +130,8 @@ struct arena_bin_s {
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/*
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/*
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* Heap of non-full slabs. This heap is used to assure that new
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* Heap of non-full slabs. This heap is used to assure that new
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* allocations come from the non-full slab that is lowest in memory.
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* allocations come from the non-full slab that is oldest/lowest in
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* memory.
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*/
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*/
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extent_heap_t slabs_nonfull;
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extent_heap_t slabs_nonfull;
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@ -184,6 +185,9 @@ struct arena_s {
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*/
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*/
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size_t offset_state;
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size_t offset_state;
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/* Extent serial number generator state. */
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size_t extent_sn_next;
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dss_prec_t dss_prec;
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dss_prec_t dss_prec;
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/* True if a thread is currently executing arena_purge_to_limit(). */
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/* True if a thread is currently executing arena_purge_to_limit(). */
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@ -320,6 +324,7 @@ void arena_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads,
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unsigned arena_nthreads_get(arena_t *arena, bool internal);
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unsigned arena_nthreads_get(arena_t *arena, bool internal);
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void arena_nthreads_inc(arena_t *arena, bool internal);
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void arena_nthreads_inc(arena_t *arena, bool internal);
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void arena_nthreads_dec(arena_t *arena, bool internal);
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void arena_nthreads_dec(arena_t *arena, bool internal);
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size_t arena_extent_sn_next(arena_t *arena);
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arena_t *arena_new(tsdn_t *tsdn, unsigned ind);
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arena_t *arena_new(tsdn_t *tsdn, unsigned ind);
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void arena_boot(void);
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void arena_boot(void);
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void arena_prefork0(tsdn_t *tsdn, arena_t *arena);
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void arena_prefork0(tsdn_t *tsdn, arena_t *arena);
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@ -26,6 +26,20 @@ struct extent_s {
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*/
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*/
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size_t e_usize;
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size_t e_usize;
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/*
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* Serial number (potentially non-unique).
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*
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* In principle serial numbers can wrap around on 32-bit systems if
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* JEMALLOC_MUNMAP is defined, but as long as comparison functions fall
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* back on address comparison for equal serial numbers, stable (if
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* imperfect) ordering is maintained.
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*
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* Serial numbers may not be unique even in the absence of wrap-around,
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* e.g. when splitting an extent and assigning the same serial number to
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* both resulting adjacent extents.
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*/
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size_t e_sn;
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/* True if extent is active (in use). */
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/* True if extent is active (in use). */
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bool e_active;
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bool e_active;
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@ -66,7 +80,7 @@ struct extent_s {
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qr(extent_t) qr_link;
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qr(extent_t) qr_link;
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union {
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union {
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/* Linkage for per size class address-ordered heaps. */
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/* Linkage for per size class sn/address-ordered heaps. */
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phn(extent_t) ph_link;
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phn(extent_t) ph_link;
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/* Linkage for arena's large and extent_cache lists. */
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/* Linkage for arena's large and extent_cache lists. */
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@ -144,6 +158,7 @@ size_t extent_usize_get(const extent_t *extent);
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void *extent_before_get(const extent_t *extent);
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void *extent_before_get(const extent_t *extent);
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void *extent_last_get(const extent_t *extent);
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void *extent_last_get(const extent_t *extent);
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void *extent_past_get(const extent_t *extent);
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void *extent_past_get(const extent_t *extent);
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size_t extent_sn_get(const extent_t *extent);
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bool extent_active_get(const extent_t *extent);
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bool extent_active_get(const extent_t *extent);
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bool extent_retained_get(const extent_t *extent);
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bool extent_retained_get(const extent_t *extent);
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bool extent_zeroed_get(const extent_t *extent);
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bool extent_zeroed_get(const extent_t *extent);
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@ -157,16 +172,20 @@ void extent_addr_set(extent_t *extent, void *addr);
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void extent_addr_randomize(tsdn_t *tsdn, extent_t *extent, size_t alignment);
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void extent_addr_randomize(tsdn_t *tsdn, extent_t *extent, size_t alignment);
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void extent_size_set(extent_t *extent, size_t size);
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void extent_size_set(extent_t *extent, size_t size);
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void extent_usize_set(extent_t *extent, size_t usize);
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void extent_usize_set(extent_t *extent, size_t usize);
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void extent_sn_set(extent_t *extent, size_t sn);
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void extent_active_set(extent_t *extent, bool active);
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void extent_active_set(extent_t *extent, bool active);
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void extent_zeroed_set(extent_t *extent, bool zeroed);
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void extent_zeroed_set(extent_t *extent, bool zeroed);
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void extent_committed_set(extent_t *extent, bool committed);
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void extent_committed_set(extent_t *extent, bool committed);
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void extent_slab_set(extent_t *extent, bool slab);
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void extent_slab_set(extent_t *extent, bool slab);
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void extent_prof_tctx_set(extent_t *extent, prof_tctx_t *tctx);
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void extent_prof_tctx_set(extent_t *extent, prof_tctx_t *tctx);
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void extent_init(extent_t *extent, arena_t *arena, void *addr,
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void extent_init(extent_t *extent, arena_t *arena, void *addr,
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size_t size, size_t usize, bool active, bool zeroed, bool committed,
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size_t size, size_t usize, size_t sn, bool active, bool zeroed,
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bool slab);
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bool committed, bool slab);
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void extent_ring_insert(extent_t *sentinel, extent_t *extent);
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void extent_ring_insert(extent_t *sentinel, extent_t *extent);
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void extent_ring_remove(extent_t *extent);
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void extent_ring_remove(extent_t *extent);
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int extent_sn_comp(const extent_t *a, const extent_t *b);
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int extent_ad_comp(const extent_t *a, const extent_t *b);
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int extent_snad_comp(const extent_t *a, const extent_t *b);
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#endif
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#endif
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#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_EXTENT_C_))
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#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_EXTENT_C_))
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@ -243,6 +262,13 @@ extent_past_get(const extent_t *extent)
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extent_size_get(extent)));
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extent_size_get(extent)));
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}
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}
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JEMALLOC_INLINE size_t
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extent_sn_get(const extent_t *extent)
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{
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return (extent->e_sn);
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}
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JEMALLOC_INLINE bool
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JEMALLOC_INLINE bool
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extent_active_get(const extent_t *extent)
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extent_active_get(const extent_t *extent)
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{
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{
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@ -351,6 +377,13 @@ extent_usize_set(extent_t *extent, size_t usize)
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extent->e_usize = usize;
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extent->e_usize = usize;
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}
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}
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JEMALLOC_INLINE void
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extent_sn_set(extent_t *extent, size_t sn)
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{
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extent->e_sn = sn;
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}
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JEMALLOC_INLINE void
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JEMALLOC_INLINE void
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extent_active_set(extent_t *extent, bool active)
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extent_active_set(extent_t *extent, bool active)
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{
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{
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@ -388,7 +421,8 @@ extent_prof_tctx_set(extent_t *extent, prof_tctx_t *tctx)
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JEMALLOC_INLINE void
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JEMALLOC_INLINE void
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extent_init(extent_t *extent, arena_t *arena, void *addr, size_t size,
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extent_init(extent_t *extent, arena_t *arena, void *addr, size_t size,
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size_t usize, bool active, bool zeroed, bool committed, bool slab)
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size_t usize, size_t sn, bool active, bool zeroed, bool committed,
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bool slab)
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{
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{
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assert(addr == PAGE_ADDR2BASE(addr) || !slab);
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assert(addr == PAGE_ADDR2BASE(addr) || !slab);
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@ -397,6 +431,7 @@ extent_init(extent_t *extent, arena_t *arena, void *addr, size_t size,
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extent_addr_set(extent, addr);
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extent_addr_set(extent, addr);
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extent_size_set(extent, size);
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extent_size_set(extent, size);
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extent_usize_set(extent, usize);
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extent_usize_set(extent, usize);
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extent_sn_set(extent, sn);
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extent_active_set(extent, active);
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extent_active_set(extent, active);
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extent_zeroed_set(extent, zeroed);
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extent_zeroed_set(extent, zeroed);
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extent_committed_set(extent, committed);
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extent_committed_set(extent, committed);
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@ -419,6 +454,37 @@ extent_ring_remove(extent_t *extent)
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qr_remove(extent, qr_link);
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qr_remove(extent, qr_link);
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}
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}
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JEMALLOC_INLINE int
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extent_sn_comp(const extent_t *a, const extent_t *b)
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{
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size_t a_sn = extent_sn_get(a);
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size_t b_sn = extent_sn_get(b);
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return ((a_sn > b_sn) - (a_sn < b_sn));
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}
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JEMALLOC_INLINE int
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extent_ad_comp(const extent_t *a, const extent_t *b)
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{
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uintptr_t a_addr = (uintptr_t)extent_addr_get(a);
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uintptr_t b_addr = (uintptr_t)extent_addr_get(b);
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return ((a_addr > b_addr) - (a_addr < b_addr));
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}
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JEMALLOC_INLINE int
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extent_snad_comp(const extent_t *a, const extent_t *b)
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{
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int ret;
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ret = extent_sn_comp(a, b);
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if (ret != 0)
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return (ret);
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ret = extent_ad_comp(a, b);
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return (ret);
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}
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#endif
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#endif
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#endif /* JEMALLOC_H_INLINES */
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#endif /* JEMALLOC_H_INLINES */
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@ -31,6 +31,7 @@ arena_extent_cache_maybe_remove
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arena_extent_dalloc_large
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arena_extent_dalloc_large
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arena_extent_ralloc_large_expand
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arena_extent_ralloc_large_expand
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arena_extent_ralloc_large_shrink
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arena_extent_ralloc_large_shrink
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arena_extent_sn_next
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arena_get
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arena_get
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arena_ichoose
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arena_ichoose
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arena_init
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arena_init
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@ -132,6 +133,7 @@ decay_ticker_get
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dss_prec_names
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dss_prec_names
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extent_active_get
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extent_active_get
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extent_active_set
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extent_active_set
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extent_ad_comp
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extent_addr_get
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extent_addr_get
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extent_addr_randomize
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extent_addr_randomize
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extent_addr_set
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extent_addr_set
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@ -188,6 +190,10 @@ extent_slab_data_get
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extent_slab_data_get_const
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extent_slab_data_get_const
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extent_slab_get
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extent_slab_get
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extent_slab_set
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extent_slab_set
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extent_sn_comp
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extent_sn_get
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extent_sn_set
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extent_snad_comp
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extent_split_wrapper
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extent_split_wrapper
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extent_usize_get
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extent_usize_get
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extent_usize_set
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extent_usize_set
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27
src/arena.c
27
src/arena.c
@ -760,7 +760,7 @@ arena_purge_to_limit(tsdn_t *tsdn, arena_t *arena, size_t ndirty_limit)
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size_t ndirty = arena_dirty_count(tsdn, arena);
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size_t ndirty = arena_dirty_count(tsdn, arena);
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assert(ndirty == arena->ndirty);
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assert(ndirty == arena->ndirty);
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}
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}
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extent_init(&purge_extents_sentinel, arena, NULL, 0, 0, false, false,
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extent_init(&purge_extents_sentinel, arena, NULL, 0, 0, 0, false, false,
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false, false);
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false, false);
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npurge = arena_stash_dirty(tsdn, arena, &extent_hooks, ndirty_limit,
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npurge = arena_stash_dirty(tsdn, arena, &extent_hooks, ndirty_limit,
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@ -1351,12 +1351,12 @@ arena_bin_lower_slab(tsdn_t *tsdn, arena_t *arena, extent_t *slab,
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assert(extent_slab_data_get(slab)->nfree > 0);
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assert(extent_slab_data_get(slab)->nfree > 0);
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/*
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/*
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* Make sure that if bin->slabcur is non-NULL, it refers to the lowest
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* Make sure that if bin->slabcur is non-NULL, it refers to the
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* non-full slab. It is okay to NULL slabcur out rather than
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* oldest/lowest non-full slab. It is okay to NULL slabcur out rather
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* proactively keeping it pointing at the lowest non-full slab.
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* than proactively keeping it pointing at the oldest/lowest non-full
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* slab.
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*/
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*/
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if (bin->slabcur != NULL && (uintptr_t)extent_addr_get(slab) <
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if (bin->slabcur != NULL && extent_snad_comp(bin->slabcur, slab) > 0) {
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(uintptr_t)extent_addr_get(bin->slabcur)) {
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/* Switch slabcur. */
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/* Switch slabcur. */
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if (extent_slab_data_get(bin->slabcur)->nfree > 0)
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if (extent_slab_data_get(bin->slabcur)->nfree > 0)
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arena_bin_slabs_nonfull_insert(bin, bin->slabcur);
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arena_bin_slabs_nonfull_insert(bin, bin->slabcur);
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@ -1651,6 +1651,13 @@ arena_nthreads_dec(arena_t *arena, bool internal)
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atomic_sub_u(&arena->nthreads[internal], 1);
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atomic_sub_u(&arena->nthreads[internal], 1);
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}
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}
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size_t
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arena_extent_sn_next(arena_t *arena)
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{
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return (atomic_add_zu(&arena->extent_sn_next, 1) - 1);
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}
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arena_t *
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arena_t *
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arena_new(tsdn_t *tsdn, unsigned ind)
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arena_new(tsdn_t *tsdn, unsigned ind)
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{
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{
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@ -1684,6 +1691,8 @@ arena_new(tsdn_t *tsdn, unsigned ind)
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(size_t)(uintptr_t)arena;
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(size_t)(uintptr_t)arena;
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}
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}
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arena->extent_sn_next = 0;
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arena->dss_prec = extent_dss_prec_get();
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arena->dss_prec = extent_dss_prec_get();
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arena->purging = false;
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arena->purging = false;
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@ -1702,7 +1711,7 @@ arena_new(tsdn_t *tsdn, unsigned ind)
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extent_heap_new(&arena->extents_retained[i]);
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extent_heap_new(&arena->extents_retained[i]);
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}
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}
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extent_init(&arena->extents_dirty, arena, NULL, 0, 0, false, false,
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extent_init(&arena->extents_dirty, arena, NULL, 0, 0, 0, false, false,
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false, false);
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false, false);
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if (malloc_mutex_init(&arena->extents_mtx, "arena_extents",
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if (malloc_mutex_init(&arena->extents_mtx, "arena_extents",
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@ -1724,8 +1733,8 @@ arena_new(tsdn_t *tsdn, unsigned ind)
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return (NULL);
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return (NULL);
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bin->slabcur = NULL;
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bin->slabcur = NULL;
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extent_heap_new(&bin->slabs_nonfull);
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extent_heap_new(&bin->slabs_nonfull);
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extent_init(&bin->slabs_full, arena, NULL, 0, 0, false, false,
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extent_init(&bin->slabs_full, arena, NULL, 0, 0, 0, false,
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false, false);
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false, false, false);
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if (config_stats)
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if (config_stats)
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memset(&bin->stats, 0, sizeof(malloc_bin_stats_t));
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memset(&bin->stats, 0, sizeof(malloc_bin_stats_t));
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}
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}
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12
src/base.c
12
src/base.c
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/* Data. */
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/* Data. */
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static malloc_mutex_t base_mtx;
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static malloc_mutex_t base_mtx;
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static size_t base_extent_sn_next;
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static extent_heap_t base_avail[NSIZES];
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static extent_heap_t base_avail[NSIZES];
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static extent_t *base_extents;
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static extent_t *base_extents;
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static size_t base_allocated;
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static size_t base_allocated;
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@ -37,6 +38,14 @@ base_extent_dalloc(tsdn_t *tsdn, extent_t *extent)
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base_extents = extent;
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base_extents = extent;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
base_extent_init(extent_t *extent, void *addr, size_t size)
|
||||||
|
{
|
||||||
|
size_t sn = atomic_add_zu(&base_extent_sn_next, 1) - 1;
|
||||||
|
|
||||||
|
extent_init(extent, NULL, addr, size, 0, sn, true, true, true, false);
|
||||||
|
}
|
||||||
|
|
||||||
static extent_t *
|
static extent_t *
|
||||||
base_extent_alloc(tsdn_t *tsdn, size_t minsize)
|
base_extent_alloc(tsdn_t *tsdn, size_t minsize)
|
||||||
{
|
{
|
||||||
@ -74,7 +83,7 @@ base_extent_alloc(tsdn_t *tsdn, size_t minsize)
|
|||||||
base_resident += PAGE_CEILING(nsize);
|
base_resident += PAGE_CEILING(nsize);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
extent_init(extent, NULL, addr, esize, 0, true, true, true, false);
|
base_extent_init(extent, addr, esize);
|
||||||
return (extent);
|
return (extent);
|
||||||
}
|
}
|
||||||
|
|
||||||
@ -164,6 +173,7 @@ base_boot(void)
|
|||||||
|
|
||||||
if (malloc_mutex_init(&base_mtx, "base", WITNESS_RANK_BASE))
|
if (malloc_mutex_init(&base_mtx, "base", WITNESS_RANK_BASE))
|
||||||
return (true);
|
return (true);
|
||||||
|
base_extent_sn_next = 0;
|
||||||
for (i = 0; i < NSIZES; i++)
|
for (i = 0; i < NSIZES; i++)
|
||||||
extent_heap_new(&base_avail[i]);
|
extent_heap_new(&base_avail[i]);
|
||||||
base_extents = NULL;
|
base_extents = NULL;
|
||||||
|
28
src/extent.c
28
src/extent.c
@ -177,17 +177,8 @@ extent_size_quantize_t *extent_size_quantize_ceil =
|
|||||||
JEMALLOC_N(n_extent_size_quantize_ceil);
|
JEMALLOC_N(n_extent_size_quantize_ceil);
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
JEMALLOC_INLINE_C int
|
|
||||||
extent_ad_comp(const extent_t *a, const extent_t *b)
|
|
||||||
{
|
|
||||||
uintptr_t a_addr = (uintptr_t)extent_addr_get(a);
|
|
||||||
uintptr_t b_addr = (uintptr_t)extent_addr_get(b);
|
|
||||||
|
|
||||||
return ((a_addr > b_addr) - (a_addr < b_addr));
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Generate pairing heap functions. */
|
/* Generate pairing heap functions. */
|
||||||
ph_gen(, extent_heap_, extent_heap_t, extent_t, ph_link, extent_ad_comp)
|
ph_gen(, extent_heap_, extent_heap_t, extent_t, ph_link, extent_snad_comp)
|
||||||
|
|
||||||
static void
|
static void
|
||||||
extent_heaps_insert(tsdn_t *tsdn, extent_heap_t extent_heaps[NPSIZES+1],
|
extent_heaps_insert(tsdn_t *tsdn, extent_heap_t extent_heaps[NPSIZES+1],
|
||||||
@ -353,8 +344,8 @@ extent_deregister(tsdn_t *tsdn, extent_t *extent)
|
|||||||
}
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Do first-best-fit extent selection, i.e. select the lowest extent that best
|
* Do first-best-fit extent selection, i.e. select the oldest/lowest extent that
|
||||||
* fits.
|
* best fits.
|
||||||
*/
|
*/
|
||||||
static extent_t *
|
static extent_t *
|
||||||
extent_first_best_fit(tsdn_t *tsdn, arena_t *arena,
|
extent_first_best_fit(tsdn_t *tsdn, arena_t *arena,
|
||||||
@ -708,7 +699,8 @@ extent_alloc_wrapper_hard(tsdn_t *tsdn, arena_t *arena,
|
|||||||
extent_dalloc(tsdn, arena, extent);
|
extent_dalloc(tsdn, arena, extent);
|
||||||
return (NULL);
|
return (NULL);
|
||||||
}
|
}
|
||||||
extent_init(extent, arena, addr, size, usize, true, zero, commit, slab);
|
extent_init(extent, arena, addr, size, usize,
|
||||||
|
arena_extent_sn_next(arena), true, zero, commit, slab);
|
||||||
if (pad != 0)
|
if (pad != 0)
|
||||||
extent_addr_randomize(tsdn, extent, alignment);
|
extent_addr_randomize(tsdn, extent, alignment);
|
||||||
if (extent_register(tsdn, extent)) {
|
if (extent_register(tsdn, extent)) {
|
||||||
@ -1036,7 +1028,7 @@ extent_split_wrapper(tsdn_t *tsdn, arena_t *arena,
|
|||||||
extent_t lead;
|
extent_t lead;
|
||||||
|
|
||||||
extent_init(&lead, arena, extent_addr_get(extent), size_a,
|
extent_init(&lead, arena, extent_addr_get(extent), size_a,
|
||||||
usize_a, extent_active_get(extent),
|
usize_a, extent_sn_get(extent), extent_active_get(extent),
|
||||||
extent_zeroed_get(extent), extent_committed_get(extent),
|
extent_zeroed_get(extent), extent_committed_get(extent),
|
||||||
extent_slab_get(extent));
|
extent_slab_get(extent));
|
||||||
|
|
||||||
@ -1046,9 +1038,9 @@ extent_split_wrapper(tsdn_t *tsdn, arena_t *arena,
|
|||||||
}
|
}
|
||||||
|
|
||||||
extent_init(trail, arena, (void *)((uintptr_t)extent_base_get(extent) +
|
extent_init(trail, arena, (void *)((uintptr_t)extent_base_get(extent) +
|
||||||
size_a), size_b, usize_b, extent_active_get(extent),
|
size_a), size_b, usize_b, extent_sn_get(extent),
|
||||||
extent_zeroed_get(extent), extent_committed_get(extent),
|
extent_active_get(extent), extent_zeroed_get(extent),
|
||||||
extent_slab_get(extent));
|
extent_committed_get(extent), extent_slab_get(extent));
|
||||||
if (extent_rtree_acquire(tsdn, rtree_ctx, trail, false, true,
|
if (extent_rtree_acquire(tsdn, rtree_ctx, trail, false, true,
|
||||||
&trail_elm_a, &trail_elm_b))
|
&trail_elm_a, &trail_elm_b))
|
||||||
goto label_error_c;
|
goto label_error_c;
|
||||||
@ -1145,6 +1137,8 @@ extent_merge_wrapper(tsdn_t *tsdn, arena_t *arena,
|
|||||||
|
|
||||||
extent_size_set(a, extent_size_get(a) + extent_size_get(b));
|
extent_size_set(a, extent_size_get(a) + extent_size_get(b));
|
||||||
extent_usize_set(a, extent_usize_get(a) + extent_usize_get(b));
|
extent_usize_set(a, extent_usize_get(a) + extent_usize_get(b));
|
||||||
|
extent_sn_set(a, (extent_sn_get(a) < extent_sn_get(b)) ?
|
||||||
|
extent_sn_get(a) : extent_sn_get(b));
|
||||||
extent_zeroed_set(a, extent_zeroed_get(a) && extent_zeroed_get(b));
|
extent_zeroed_set(a, extent_zeroed_get(a) && extent_zeroed_get(b));
|
||||||
|
|
||||||
extent_rtree_write_acquired(tsdn, a_elm_a, b_elm_b, a);
|
extent_rtree_write_acquired(tsdn, a_elm_a, b_elm_b, a);
|
||||||
|
@ -142,7 +142,8 @@ extent_alloc_dss(tsdn_t *tsdn, arena_t *arena, void *new_addr, size_t size,
|
|||||||
gap_size = (uintptr_t)ret - (uintptr_t)gap_addr;
|
gap_size = (uintptr_t)ret - (uintptr_t)gap_addr;
|
||||||
if (gap_size != 0) {
|
if (gap_size != 0) {
|
||||||
extent_init(gap, arena, gap_addr, gap_size,
|
extent_init(gap, arena, gap_addr, gap_size,
|
||||||
gap_size, false, false, true, false);
|
gap_size, arena_extent_sn_next(arena),
|
||||||
|
false, false, true, false);
|
||||||
}
|
}
|
||||||
dss_next = (void *)((uintptr_t)ret + size);
|
dss_next = (void *)((uintptr_t)ret + size);
|
||||||
if ((uintptr_t)ret < (uintptr_t)max_cur ||
|
if ((uintptr_t)ret < (uintptr_t)max_cur ||
|
||||||
|
Loading…
Reference in New Issue
Block a user