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improve arena cache to avoid full scans

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This commit is contained in:
daan 2020-05-01 23:00:17 -07:00
parent dcb3574cf0
commit 8bfd5ec865
3 changed files with 50 additions and 10 deletions
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4
src/segment.c
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@ -960,6 +960,7 @@ static void mi_abandoned_push(mi_segment_t* segment) {
}
// Wait until there are no more pending reads on segments that used to be in the abandoned list
// called for example from `arena.c` before decommitting
void _mi_abandoned_await_readers(void) {
uintptr_t n;
do {
@ -982,8 +983,7 @@ static mi_segment_t* mi_abandoned_pop(void) {
// Do a pop. We use a reader count to prevent
// a segment to be decommitted while a read is still pending,
// and a tagged pointer to prevent A-B-A link corruption.
// (this is called from `memory.c:_mi_mem_free` for example)
// and a tagged pointer to prevent A-B-A link corruption.
mi_atomic_increment(&abandoned_readers); // ensure no segment gets decommitted
mi_tagged_segment_t next = 0;
do {