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add minimal commit size for increased efficiency (decommit fine grained, commit coarse grained)

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daan 2022-02-05 10:57:15 -08:00
parent 9ca363d0e4
commit e11100a137
2 changed files with 12 additions and 4 deletions
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9
include/mimalloc-types.h
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@ -320,10 +320,15 @@ typedef enum mi_segment_kind_e {
// the corresponding MI_COMMIT_SIZE area is committed.
// The MI_COMMIT_SIZE must be a multiple of the slice
// size. If it is equal we have the most fine grained
// decommit but setting it higher can be more efficient.
// decommit (but setting it higher can be more efficient).
// The MI_MINIMAL_COMMIT_SIZE is the minimal amount that will
// be committed in one go which can be set higher than
// MI_COMMIT_SIZE for efficiency (while the decommit mask
// is still tracked in fine-grained MI_COMMIT_SIZE chunks)
// ------------------------------------------------------
#define MI_COMMIT_SIZE (8*MI_SEGMENT_SLICE_SIZE)
#define MI_MINIMAL_COMMIT_SIZE (16*MI_SEGMENT_SLICE_SIZE) // 1MiB
#define MI_COMMIT_SIZE (MI_SEGMENT_SLICE_SIZE)
#define MI_COMMIT_MASK_BITS (MI_SEGMENT_SIZE / MI_COMMIT_SIZE)
#define MI_COMMIT_MASK_FIELD_BITS MI_SIZE_BITS
#define MI_COMMIT_MASK_FIELD_COUNT (MI_COMMIT_MASK_BITS / MI_COMMIT_MASK_FIELD_BITS)