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working simplified version without pairmaps and bitmap epoch

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daanx 2024-12-06 15:26:01 -08:00
parent ec9c61c066
commit 61436a92b9
5 changed files with 44 additions and 38 deletions
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6
src/page-map.c
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@ -13,7 +13,7 @@ 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 = { 1, MI_BITMAP_MIN_CHUNK_COUNT };
static mi_bitmap_t mi_page_map_commit = { MI_BITMAP_DEFAULT_CHUNK_COUNT, { 0 }, { 0 }, { { 0 } } };
bool _mi_page_map_init(void) {
size_t vbits = _mi_os_virtual_address_bits();
@ -22,10 +22,10 @@ bool _mi_page_map_init(void) {
// 64 KiB for 4 GiB address space (on 32-bit)
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_page_map_entries_per_commit_bit = _mi_divide_up(page_map_size, MI_BITMAP_DEFAULT_BIT_COUNT);
// 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_all_committed = (page_map_size <= 1*MI_MiB); // _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);
if (_mi_page_map==NULL) {
_mi_error_message(ENOMEM, "unable to reserve virtual memory for the page map (%zu KiB)\n", page_map_size / MI_KiB);