kiper220/mimalloc
1
0
Fork 0
mirror of https://github.com/microsoft/mimalloc.git synced 2025-07-06 19:38:41 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

align size of page_t, increase slices per segment

Browse source
This commit is contained in:
Daan Leijen 2020-01-22 11:29:32 -08:00
parent 0028272cf4
commit caa5e51a67
4 changed files with 24 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

32
include/mimalloc-types.h
View file

@ -89,7 +89,7 @@ terms of the MIT license. A copy of the license can be found in the file
// Main tuning parameters for segment and page sizes
// Sizes for 64-bit, divide by two for 32-bit
#define MI_SEGMENT_SLICE_SHIFT (13 + MI_INTPTR_SHIFT) // 64kb
#define MI_SEGMENT_SHIFT ( 8 + MI_SEGMENT_SLICE_SHIFT) // 64mb
#define MI_SEGMENT_SHIFT ( 9 + MI_SEGMENT_SLICE_SHIFT) // 64mb
#define MI_SMALL_PAGE_SHIFT (MI_SEGMENT_SLICE_SHIFT) // 64kb
#define MI_MEDIUM_PAGE_SHIFT ( 3 + MI_SMALL_PAGE_SHIFT) // 512kb
@ -104,7 +104,7 @@ terms of the MIT license. A copy of the license can be found in the file
#define MI_SMALL_PAGE_SIZE (1ULL<<MI_SMALL_PAGE_SHIFT)
#define MI_MEDIUM_PAGE_SIZE (1ULL<<MI_MEDIUM_PAGE_SHIFT)
#define MI_SMALL_OBJ_SIZE_MAX (MI_SMALL_PAGE_SIZE/8) // 8kb on 64-bit
#define MI_SMALL_OBJ_SIZE_MAX (MI_SMALL_PAGE_SIZE/4) // 8kb on 64-bit
#define MI_MEDIUM_OBJ_SIZE_MAX (MI_MEDIUM_PAGE_SIZE/4) // 128kb on 64-bit
#define MI_MEDIUM_OBJ_WSIZE_MAX (MI_MEDIUM_OBJ_SIZE_MAX/MI_INTPTR_SIZE) // 64kb on 64-bit
@ -201,31 +201,35 @@ typedef struct mi_page_s {
// "owned" by the segment
uint32_t slice_count; // slices in this page (0 if not a page)
uint32_t slice_offset; // distance from the actual page data slice (0 if a page)
uint8_t is_reset:1; // `true` if the page memory was reset
uint8_t is_committed:1; // `true` if the page virtual memory is committed
uint8_t is_zero_init:1; // `true` if the page was zero initialized
uint8_t is_reset : 1; // `true` if the page memory was reset
uint8_t is_committed : 1; // `true` if the page virtual memory is committed
uint8_t is_zero_init : 1; // `true` if the page was zero initialized
// layout like this to optimize access in `mi_malloc` and `mi_free`
uint16_t capacity; // number of blocks committed, must be the first field, see `segment.c:page_clear`
uint16_t reserved; // number of blocks reserved in memory
mi_page_flags_t flags; // `in_full` and `has_aligned` flags (8 bits)
uint8_t is_zero:1; // `true` if the blocks in the free list are zero initialized
uint8_t retire_expire:7; // expiration count for retired blocks
uint8_t is_zero : 1; // `true` if the blocks in the free list are zero initialized
uint8_t retire_expire : 7; // expiration count for retired blocks
mi_block_t* free; // list of available free blocks (`malloc` allocates from this list)
#ifdef MI_ENCODE_FREELIST
mi_block_t* free; // list of available free blocks (`malloc` allocates from this list)
#ifdef MI_ENCODE_FREELIST
uintptr_t key[2]; // two random keys to encode the free lists (see `_mi_block_next`)
#endif
#endif
uint32_t used; // number of blocks in use (including blocks in `local_free` and `thread_free`)
uint32_t xblock_size; // size available in each block (always `>0`)
mi_block_t* local_free; // list of deferred free blocks by this thread (migrates to `free`)
mi_block_t* local_free; // list of deferred free blocks by this thread (migrates to `free`)
volatile _Atomic(mi_thread_free_t) xthread_free; // list of deferred free blocks freed by other threads
volatile _Atomic(uintptr_t) xheap;
struct mi_page_s* next; // next page owned by this thread with the same `block_size`
struct mi_page_s* prev; // previous page owned by this thread with the same `block_size`
struct mi_page_s* next; // next page owned by this thread with the same `block_size`
struct mi_page_s* prev; // previous page owned by this thread with the same `block_size`
// 64-bit 9 words, 32-bit 12 words, (+2 for secure)
#if MI_INTPTR_SIZE==8
uintptr_t padding[1];
#endif
} mi_page_t;