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Handle medium allocation in dedicated segments

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Sergiy Kuryata 2024-12-09 21:37:27 -08:00
parent 897f818f8d
commit 340f2a74bb
7 changed files with 169 additions and 54 deletions
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2
include/mimalloc/internal.h
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@ -1025,4 +1025,6 @@ void mi_segment_increment_reclaim_failed_stats();
void mi_allocation_stats_increment(size_t block_size);
void mi_allocation_stats_decrement(size_t block_size);
mi_page_kind_t mi_page_kind_from_size(size_t block_size);
#endif

4
include/mimalloc/types.h
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@ -453,7 +453,6 @@ typedef struct mi_segment_s {
mi_memid_t memid; // memory id for arena/OS allocation
bool allow_decommit; // can we decommmit the memory
bool allow_purge; // can we purge the memory (reset or decommit)
bool is_for_large_pages; // this should be part of segment_kind; indicates if segment is used to allocate large pages
size_t segment_size;
// segment fields
@ -475,6 +474,7 @@ typedef struct mi_segment_s {
// layout like this to optimize access in `mi_free`
mi_segment_kind_t kind;
mi_page_kind_t page_kind; // this should be part of segment_kind; indicates if the preferred page size of the segment
size_t slice_entries; // entries in the `slices` array, at most `MI_SLICES_PER_SEGMENT`
_Atomic(mi_threadid_t) thread_id; // unique id of the thread owning this segment
_Atomic(size_t) free_space_mask; // bitmask that indicates wich allocation sizes are available in this segment
@ -704,7 +704,9 @@ typedef struct mi_os_tld_s {
// Segments thread local data
typedef struct mi_segments_tld_s {
mi_span_queue_t spans[MI_SEGMENT_BIN_MAX+1]; // free slice spans inside segments
mi_span_queue_t medium_spans[MI_SEGMENT_BIN_MAX+1]; // free slice spans inside medium segments
mi_span_queue_t large_spans[MI_SEGMENT_BIN_MAX+1]; // free slice spans inside large segments
mi_segment_t* medium_segment;
mi_segment_t* large_segment;
size_t count; // current number of segments;
size_t peak_count; // peak number of segments