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increase commit mask blocks to 2xslice size

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This commit is contained in:
daan 2021-11-13 20:12:03 -08:00
parent 7e22e5ce6e
commit 511a8996f3
2 changed files with 4 additions and 5 deletions
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7
include/mimalloc-types.h
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@ -308,12 +308,11 @@ typedef enum mi_segment_kind_e {
// A segment holds a commit mask where a bit is set if
// the corresponding MI_COMMIT_SIZE area is committed.
// The MI_COMMIT_SIZE must be a multiple of the slice
// size. We define it as equal so we can decommit on a
// slice level which helps with (real) memory fragmentation
// over time.
// size. If it is equal we have the most fine grained
// decommit but in practice 2x seems to perform better.
// ------------------------------------------------------
#define MI_COMMIT_SIZE (MI_SEGMENT_SLICE_SIZE)
#define MI_COMMIT_SIZE (2*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)

2
src/segment.c
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@ -583,7 +583,7 @@ static void mi_segment_perhaps_decommit(mi_segment_t* segment, uint8_t* p, size_
}
else {
// previous decommit mask is not yet expired
// segment->decommit_expire += 1; // = now + mi_option_get(mi_option_reset_delay);
// segment->decommit_expire += 2; // = now + mi_option_get(mi_option_reset_delay);
}
}
}