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experiment with 32KiB slices and increased MI_MIN_EXTEND

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Daan Leijen 2022-11-18 09:38:01 -08:00
parent b940543cd5
commit 82a765a255
2 changed files with 6 additions and 6 deletions
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8
include/mimalloc-types.h
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@ -132,16 +132,16 @@ typedef int32_t mi_ssize_t;
// Main tuning parameters for segment and page sizes // Main tuning parameters for segment and page sizes
// Sizes for 64-bit (usually divide by two for 32-bit) // Sizes for 64-bit (usually divide by two for 32-bit)
#define MI_SEGMENT_SLICE_SHIFT (12 + MI_INTPTR_SHIFT) // 64KiB (32KiB on 32-bit) #define MI_SEGMENT_SLICE_SHIFT (12 + MI_INTPTR_SHIFT) // 32KiB (32KiB on 32-bit)
#if MI_INTPTR_SIZE > 4 #if MI_INTPTR_SIZE > 4
#define MI_SEGMENT_SHIFT (10 + MI_SEGMENT_SLICE_SHIFT) // 64MiB #define MI_SEGMENT_SHIFT (10 + MI_SEGMENT_SLICE_SHIFT) // 32MiB
#else #else
#define MI_SEGMENT_SHIFT ( 7 + MI_SEGMENT_SLICE_SHIFT) // 4MiB on 32-bit #define MI_SEGMENT_SHIFT ( 7 + MI_SEGMENT_SLICE_SHIFT) // 4MiB on 32-bit
#endif #endif
#define MI_SMALL_PAGE_SHIFT (MI_SEGMENT_SLICE_SHIFT) // 64KiB #define MI_SMALL_PAGE_SHIFT (MI_SEGMENT_SLICE_SHIFT) // 64KiB
#define MI_MEDIUM_PAGE_SHIFT ( 3 + MI_SMALL_PAGE_SHIFT) // 512KiB #define MI_MEDIUM_PAGE_SHIFT ( 4 + MI_SMALL_PAGE_SHIFT) // 512KiB
// Derived constants // Derived constants
@ -324,7 +324,7 @@ typedef enum mi_segment_kind_e {
// is still tracked in fine-grained MI_COMMIT_SIZE chunks) // is still tracked in fine-grained MI_COMMIT_SIZE chunks)
// ------------------------------------------------------ // ------------------------------------------------------
#define MI_MINIMAL_COMMIT_SIZE (MI_MiB) #define MI_MINIMAL_COMMIT_SIZE (2*MI_MiB)
#define MI_COMMIT_SIZE (MI_SEGMENT_SLICE_SIZE) // 64KiB #define MI_COMMIT_SIZE (MI_SEGMENT_SLICE_SIZE) // 64KiB
#define MI_COMMIT_MASK_BITS (MI_SEGMENT_SIZE / MI_COMMIT_SIZE) #define MI_COMMIT_MASK_BITS (MI_SEGMENT_SIZE / MI_COMMIT_SIZE)
#define MI_COMMIT_MASK_FIELD_BITS MI_SIZE_BITS #define MI_COMMIT_MASK_FIELD_BITS MI_SIZE_BITS

4
src/page.c
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@ -408,7 +408,7 @@ void _mi_page_free(mi_page_t* page, mi_page_queue_t* pq, bool force) {
} }
// Retire parameters // Retire parameters
#define MI_MAX_RETIRE_SIZE MI_MEDIUM_OBJ_SIZE_MAX #define MI_MAX_RETIRE_SIZE (MI_MEDIUM_OBJ_SIZE_MAX)
#define MI_RETIRE_CYCLES (8) #define MI_RETIRE_CYCLES (8)
// Retire a page with no more used blocks // Retire a page with no more used blocks
@ -579,7 +579,7 @@ static mi_decl_noinline void mi_page_free_list_extend( mi_page_t* const page, co
#if (MI_SECURE>0) #if (MI_SECURE>0)
#define MI_MIN_EXTEND (8*MI_SECURE) // extend at least by this many #define MI_MIN_EXTEND (8*MI_SECURE) // extend at least by this many
#else #else
#define MI_MIN_EXTEND (1) #define MI_MIN_EXTEND (4)
#endif #endif
// Extend the capacity (up to reserved) by initializing a free list // Extend the capacity (up to reserved) by initializing a free list