From: Rémi Bernon rbernon@codeweavers.com
--- dlls/ntdll/heap.c | 83 +++++++++++++++++++++++++++++++++++++++-- dlls/ntdll/loader.c | 2 + dlls/ntdll/ntdll_misc.h | 1 + 3 files changed, 83 insertions(+), 3 deletions(-)
diff --git a/dlls/ntdll/heap.c b/dlls/ntdll/heap.c index 27e8ea70774..7af7e422354 100644 --- a/dlls/ntdll/heap.c +++ b/dlls/ntdll/heap.c @@ -255,6 +255,9 @@ C_ASSERT( BLOCK_BIN_SIZE( 0x80 ) == ~(SIZE_T)0 ); /* difference between block classes and all possible validation overhead must fit into block tail_size */ C_ASSERT( BIN_SIZE_STEP_7 + 3 * BLOCK_ALIGN <= FIELD_MAX( struct block, tail_size ) );
+static BYTE affinity_mapping[] = {20,6,31,15,14,29,27,4,18,24,26,13,0,9,2,30,17,7,23,25,10,19,12,3,22,21,5,16,1,28,11,8}; +static LONG next_thread_affinity; + /* a bin, tracking heap blocks of a certain size */ struct bin { @@ -265,6 +268,13 @@ struct bin
/* list of groups with free blocks */ SLIST_HEADER groups; + + /* array of affinity reserved groups, interleaved with other bins to keep + * all pointers of the same affinity and different bin grouped together, + * and pointers of the same bin and different affinity away from each other, + * hopefully in separate cache lines. + */ + struct group *(*affinity_group)[BLOCK_SIZE_BIN_COUNT]; };
struct heap @@ -1533,11 +1543,16 @@ HANDLE WINAPI RtlCreateHeap( ULONG flags, void *addr, SIZE_T total_size, SIZE_T
if (heap->flags & HEAP_GROWABLE) { - SIZE_T size = sizeof(struct bin) * BLOCK_SIZE_BIN_COUNT; + SIZE_T size = (sizeof(struct bin) + sizeof(struct group *) * ARRAY_SIZE(affinity_mapping)) * BLOCK_SIZE_BIN_COUNT; NtAllocateVirtualMemory( NtCurrentProcess(), (void *)&heap->bins, 0, &size, MEM_COMMIT, PAGE_READWRITE ); for (i = 0; i < BLOCK_SIZE_BIN_COUNT; ++i) + { + struct group **affinity_groups = (struct group **)(heap->bins + BLOCK_SIZE_BIN_COUNT); RtlInitializeSListHead( &heap->bins[i].groups ); + /* offset the bin affinity_group pointer to interleaved the affinity groups */ + heap->bins[i].affinity_group = (void *)(affinity_groups + i); + } }
/* link it into the per-process heap list */ @@ -1695,6 +1710,8 @@ struct DECLSPEC_ALIGN(BLOCK_ALIGN) group SLIST_ENTRY entry; /* one bit for each free block and the highest bit for GROUP_FLAG_FREE */ LONG free_bits; + /* affinity of the thread which last allocated from this group */ + LONG affinity; /* first block of a group, required for alignment */ struct block first_block; }; @@ -1794,11 +1811,30 @@ static NTSTATUS group_release( struct heap *heap, ULONG flags, struct bin *bin, return status; }
+static inline ULONG heap_current_thread_affinity(void) +{ + ULONG affinity; + + if (!(affinity = NtCurrentTeb()->HeapVirtualAffinity)) + { + affinity = InterlockedIncrement( &next_thread_affinity ); + affinity = affinity_mapping[affinity % ARRAY_SIZE(affinity_mapping)]; + NtCurrentTeb()->HeapVirtualAffinity = affinity; + } + + return affinity; +} + /* acquire a group from the bin, thread takes ownership of a shared group or allocates a new one */ static struct group *heap_acquire_bin_group( struct heap *heap, ULONG flags, SIZE_T block_size, struct bin *bin ) { + ULONG affinity = NtCurrentTeb()->HeapVirtualAffinity; + struct group *group; SLIST_ENTRY *entry;
+ if ((group = InterlockedExchangePointer( (void *)&bin->affinity_group[affinity], NULL ))) + return group; + if ((entry = RtlInterlockedPopEntrySList( &bin->groups ))) return CONTAINING_RECORD( entry, struct group, entry );
@@ -1808,8 +1844,16 @@ static struct group *heap_acquire_bin_group( struct heap *heap, ULONG flags, SIZ /* release a thread owned and fully freed group to the bin shared group, or free its memory */ static NTSTATUS heap_release_bin_group( struct heap *heap, ULONG flags, struct bin *bin, struct group *group ) { + ULONG affinity = group->affinity; + + /* using InterlockedExchangePointer here would possibly return a group that has used blocks, + * we prefer keeping our fully freed group instead for reduced memory consumption. + */ + if (!InterlockedCompareExchangePointer( (void *)&bin->affinity_group[affinity], group, NULL )) + return STATUS_SUCCESS; + /* try re-using the block group instead of releasing it */ - if (!RtlQueryDepthSList( &bin->groups )) + if (RtlQueryDepthSList( &bin->groups ) <= ARRAY_SIZE(affinity_mapping)) { RtlInterlockedPushEntrySList( &bin->groups, (SLIST_ENTRY *)&group->entry ); return STATUS_SUCCESS; @@ -1820,6 +1864,7 @@ static NTSTATUS heap_release_bin_group( struct heap *heap, ULONG flags, struct b
static struct block *find_free_bin_block( struct heap *heap, ULONG flags, SIZE_T block_size, struct bin *bin ) { + ULONG affinity = heap_current_thread_affinity(); struct block *block; struct group *group;
@@ -1827,13 +1872,16 @@ static struct block *find_free_bin_block( struct heap *heap, ULONG flags, SIZE_T * some other thread might still set the free bits if they are freeing blocks. */ if (!(group = heap_acquire_bin_group( heap, flags, block_size, bin ))) return NULL; + group->affinity = affinity; + block = group_find_free_block( group, block_size );
/* serialize with heap_free_block_lfh: atomically set GROUP_FLAG_FREE when the free bits are all 0. */ if (ReadNoFence( &group->free_bits ) || InterlockedCompareExchange( &group->free_bits, GROUP_FLAG_FREE, 0 )) { /* if GROUP_FLAG_FREE isn't set, thread is responsible for putting it back into group list. */ - RtlInterlockedPushEntrySList( &bin->groups, (SLIST_ENTRY *)&group->entry ); + if ((group = InterlockedExchangePointer( (void *)&bin->affinity_group[affinity], group ))) + RtlInterlockedPushEntrySList( &bin->groups, (SLIST_ENTRY *)&group->entry ); }
return block; @@ -1919,6 +1967,35 @@ static void bin_try_enable( struct heap *heap, struct bin *bin ) WriteRelease( &bin->enabled, TRUE ); }
+static void heap_thread_detach_bin_groups( struct heap *heap ) +{ + ULONG i, affinity = NtCurrentTeb()->HeapVirtualAffinity; + + if (!heap->bins) return; + + for (i = 0; i < BLOCK_SIZE_BIN_COUNT; ++i) + { + struct bin *bin = heap->bins + i; + struct group *group; + if (!(group = InterlockedExchangePointer( (void *)&bin->affinity_group[affinity], NULL ))) continue; + RtlInterlockedPushEntrySList( &bin->groups, (SLIST_ENTRY *)&group->entry ); + } +} + +void heap_thread_detach(void) +{ + struct heap *heap; + + RtlEnterCriticalSection( &process_heap->cs ); + + LIST_FOR_EACH_ENTRY( heap, &process_heap->entry, struct heap, entry ) + heap_thread_detach_bin_groups( heap ); + + heap_thread_detach_bin_groups( process_heap ); + + RtlLeaveCriticalSection( &process_heap->cs ); +} + /*********************************************************************** * RtlAllocateHeap (NTDLL.@) */ diff --git a/dlls/ntdll/loader.c b/dlls/ntdll/loader.c index 01a30742678..6c643575f8d 100644 --- a/dlls/ntdll/loader.c +++ b/dlls/ntdll/loader.c @@ -3737,6 +3737,8 @@ void WINAPI LdrShutdownThread(void) /* don't call DbgUiGetThreadDebugObject as some apps hook it and terminate if called */ if (NtCurrentTeb()->DbgSsReserved[1]) NtClose( NtCurrentTeb()->DbgSsReserved[1] ); RtlFreeThreadActivationContextStack(); + + heap_thread_detach(); }
diff --git a/dlls/ntdll/ntdll_misc.h b/dlls/ntdll/ntdll_misc.h index d1a7790991b..f6b77b79cde 100644 --- a/dlls/ntdll/ntdll_misc.h +++ b/dlls/ntdll/ntdll_misc.h @@ -127,5 +127,6 @@ static inline void ascii_to_unicode( WCHAR *dst, const char *src, size_t len )
/* FLS data */ extern TEB_FLS_DATA *fls_alloc_data(void) DECLSPEC_HIDDEN; +extern void heap_thread_detach(void) DECLSPEC_HIDDEN;
#endif