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fix performance bug in mi_bchunk_try_find _and_clearNX

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Daan 2025-02-06 17:08:06 -08:00
parent 4c562f392a
commit 64aaf9d88f
1 changed files with 1 additions and 1 deletions
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src/bitmap.c
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@ -804,7 +804,7 @@ mi_decl_noinline static bool mi_bchunk_try_find_and_clearNX(mi_bchunk_t* chunk,
const size_t post = mi_bfield_clz(~b); const size_t post = mi_bfield_clz(~b);
if (post > 0) { if (post > 0) {
const size_t pre = mi_bfield_ctz(~mi_atomic_load_relaxed(&chunk->bfields[i+1])); const size_t pre = mi_bfield_ctz(~mi_atomic_load_relaxed(&chunk->bfields[i+1]));
if (post + pre <= n) { if (post + pre >= n) {
// it fits -- try to claim it atomically // it fits -- try to claim it atomically
const size_t cidx = (i*MI_BFIELD_BITS) + (MI_BFIELD_BITS - post); const size_t cidx = (i*MI_BFIELD_BITS) + (MI_BFIELD_BITS - post);
if (mi_bchunk_try_clearNX(chunk, cidx, n, NULL)) { if (mi_bchunk_try_clearNX(chunk, cidx, n, NULL)) {