kiper220/mimalloc
1
0
Fork 0
mirror of https://github.com/microsoft/mimalloc.git synced 2025-08-24 16:24:47 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

tune free-ing and abandoning

Browse source
This commit is contained in:
daanx 2024-12-05 17:00:23 -08:00
parent 0616ee151e
commit 7443ee317e
10 changed files with 125 additions and 93 deletions
Download patch file Download diff file Expand all files Collapse all files

15
src/page-map.c
View file

@ -13,9 +13,9 @@ mi_decl_cache_align uint8_t* _mi_page_map = NULL;
static bool mi_page_map_all_committed = false;
static size_t mi_page_map_entries_per_commit_bit = MI_ARENA_SLICE_SIZE;
static mi_memid_t mi_page_map_memid;
static mi_bitmap_t mi_page_map_commit;
static mi_bitmap_t mi_page_map_commit = { 1, MI_BITMAP_MIN_CHUNK_COUNT };
static bool mi_page_map_init(void) {
bool _mi_page_map_init(void) {
size_t vbits = _mi_os_virtual_address_bits();
if (vbits >= 48) vbits = 47;
// 1 byte per block = 2 GiB for 128 TiB address space (48 bit = 256 TiB address space)
@ -23,7 +23,7 @@ static bool mi_page_map_init(void) {
const size_t page_map_size = (MI_ZU(1) << (vbits - MI_ARENA_SLICE_SHIFT));
mi_page_map_entries_per_commit_bit = _mi_divide_up(page_map_size, MI_BITMAP_MIN_BIT_COUNT);
mi_bitmap_init(&mi_page_map_commit, MI_BITMAP_MIN_BIT_COUNT, true);
// mi_bitmap_init(&mi_page_map_commit, MI_BITMAP_MIN_BIT_COUNT, true);
mi_page_map_all_committed = false; // _mi_os_has_overcommit(); // commit on-access on Linux systems?
_mi_page_map = (uint8_t*)_mi_os_alloc_aligned(page_map_size, 1, mi_page_map_all_committed, true, &mi_page_map_memid, NULL);
@ -57,11 +57,15 @@ static void mi_page_map_ensure_committed(size_t idx, size_t slice_count) {
bool is_zero;
uint8_t* const start = _mi_page_map + (i*mi_page_map_entries_per_commit_bit);
const size_t size = mi_page_map_entries_per_commit_bit;
_mi_os_commit(start, size, &is_zero, NULL);
_mi_os_commit(start, size, &is_zero, NULL);
if (!is_zero && !mi_page_map_memid.initially_zero) { _mi_memzero(start,size); }
mi_bitmap_xsetN(MI_BIT_SET, &mi_page_map_commit, i, 1, NULL);
}
}
#if MI_DEBUG > 0
_mi_page_map[idx] = 0;
_mi_page_map[idx+slice_count-1] = 0;
#endif
}
}
@ -78,8 +82,9 @@ static size_t mi_page_map_get_idx(mi_page_t* page, uint8_t** page_start, size_t*
void _mi_page_map_register(mi_page_t* page) {
mi_assert_internal(page != NULL);
mi_assert_internal(_mi_is_aligned(page,MI_PAGE_ALIGN));
mi_assert_internal(_mi_page_map != NULL); // should be initialized before multi-thread access!
if mi_unlikely(_mi_page_map == NULL) {
if (!mi_page_map_init()) return;
if (!_mi_page_map_init()) return;
}
mi_assert(_mi_page_map!=NULL);
uint8_t* page_start;