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PAI/SEC: Add a dalloc_batch function.

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This lets the SEC flush all of its items in a single call, rather than flushing
everything at once.
This commit is contained in:
David Goldblatt
2021-01-04 18:40:27 -08:00
committed by David Goldblatt
parent 4b8870c7db
commit f47b4c2cd8
11 changed files with 69 additions and 11 deletions
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8
src/sec.c
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@@ -46,6 +46,7 @@ bool sec_init(sec_t *sec, pai_t *fallback, size_t nshards, size_t alloc_max,
sec->pai.expand = &sec_expand;
sec->pai.shrink = &sec_shrink;
sec->pai.dalloc = &sec_dalloc;
sec->pai.dalloc_batch = &pai_dalloc_batch_default;
return false;
}
@@ -142,6 +143,7 @@ sec_do_flush_locked(tsdn_t *tsdn, sec_t *sec, sec_shard_t *shard) {
for (pszind_t i = 0; i < SEC_NPSIZES; i++) {
edata_list_active_concat(&to_flush, &shard->freelist[i]);
}
/*
* A better way to do this would be to add a batch dalloc function to
* the pai_t. Practically, the current method turns into O(n) locks and
@@ -149,11 +151,7 @@ sec_do_flush_locked(tsdn_t *tsdn, sec_t *sec, sec_shard_t *shard) {
* HPA) can straightforwardly do many deallocations in a single lock /
* unlock pair.
*/
while (!edata_list_active_empty(&to_flush)) {
edata_t *e = edata_list_active_first(&to_flush);
edata_list_active_remove(&to_flush, e);
pai_dalloc(tsdn, sec->fallback, e);
}
pai_dalloc_batch(tsdn, sec->fallback, &to_flush);
}
static void