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wip: work on purgable arenas

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This commit is contained in:
Daan Leijen 2023-03-31 21:18:50 -07:00
parent f4e006fa76
commit c344bf5c20
2 changed files with 11 additions and 4 deletions
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2
src/segment-cache.c
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@ -16,7 +16,7 @@ terms of the MIT license. A copy of the license can be found in the file
#include "./bitmap.h" // atomic bitmap
//#define MI_CACHE_DISABLE 1 // define to completely disable the segment cache
// #define MI_CACHE_DISABLE 1 // define to completely disable the segment cache
#define MI_CACHE_FIELDS (16)
#define MI_CACHE_MAX (MI_BITMAP_FIELD_BITS*MI_CACHE_FIELDS) // 1024 on 64-bit

11
src/segment.c
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@ -11,6 +11,7 @@ terms of the MIT license. A copy of the license can be found in the file
#include <string.h> // memset
#include <stdio.h>
#define MI_USE_SEGMENT_CACHE 0
#define MI_PAGE_HUGE_ALIGN (256*1024)
static void mi_segment_delayed_decommit(mi_segment_t* segment, bool force, mi_stats_t* stats);
@ -394,8 +395,10 @@ static void mi_segment_os_free(mi_segment_t* segment, mi_segments_tld_t* tld) {
// _mi_os_free(segment, mi_segment_size(segment), /*segment->memid,*/ tld->stats);
const size_t size = mi_segment_size(segment);
if (size != MI_SEGMENT_SIZE || segment->mem_align_offset != 0 || segment->kind == MI_SEGMENT_HUGE || // only push regular segments on the cache
!_mi_segment_cache_push(segment, size, segment->memid, &segment->commit_mask, &segment->decommit_mask, segment->mem_is_large, segment->mem_is_pinned, tld->os))
#if MI_USE_SEGMENT_CACHE
if (size != MI_SEGMENT_SIZE || segment->mem_align_offset != 0 || segment->kind == MI_SEGMENT_HUGE // only push regular segments on the cache
|| !_mi_segment_cache_push(segment, size, segment->memid, &segment->commit_mask, &segment->decommit_mask, segment->mem_is_large, segment->mem_is_pinned, tld->os))
#endif
{
if (!segment->mem_is_pinned) {
const size_t csize = _mi_commit_mask_committed_size(&segment->commit_mask, size);
@ -809,10 +812,14 @@ static mi_segment_t* mi_segment_os_alloc( size_t required, size_t page_alignment
const size_t segment_size = (*psegment_slices) * MI_SEGMENT_SLICE_SIZE;
mi_segment_t* segment = NULL;
#if MI_USE_SEGMENT_CACHE
// get from cache?
if (page_alignment == 0) {
segment = (mi_segment_t*)_mi_segment_cache_pop(segment_size, pcommit_mask, pdecommit_mask, mem_large, &mem_large, &is_pinned, is_zero, req_arena_id, &memid, os_tld);
}
#else
MI_UNUSED(pdecommit_mask);
#endif
// get from OS
if (segment==NULL) {