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HPA: Allow frequent reused alloc to bypass the slab_max_alloc limit, as long as

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it's within the huge page size.  These requests do not concern internal
fragmentation with huge pages, since the entire range is expected to be
accessed.
This commit is contained in:
Qi Wang
2024-01-16 13:07:58 -08:00
committed by Qi Wang
parent b1792c80d2
commit a2c5267409
6 changed files with 51 additions and 19 deletions
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19
test/unit/hpa.c
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@@ -84,12 +84,25 @@ TEST_BEGIN(test_alloc_max) {
/* Small max */
bool deferred_work_generated = false;
edata = pai_alloc(tsdn, &shard->pai, ALLOC_MAX, PAGE, false, false,
false, &deferred_work_generated);
/* frequent_reuse */ false, &deferred_work_generated);
expect_ptr_not_null(edata, "Allocation of small max failed");
edata = pai_alloc(tsdn, &shard->pai, ALLOC_MAX + PAGE, PAGE, false,
false, false, &deferred_work_generated);
false, /* frequent_reuse */ false, &deferred_work_generated);
expect_ptr_null(edata, "Allocation of larger than small max succeeded");
edata = pai_alloc(tsdn, &shard->pai, ALLOC_MAX, PAGE, false,
false, /* frequent_reuse */ true, &deferred_work_generated);
expect_ptr_not_null(edata, "Allocation of frequent reused failed");
edata = pai_alloc(tsdn, &shard->pai, HUGEPAGE, PAGE, false,
false, /* frequent_reuse */ true, &deferred_work_generated);
expect_ptr_not_null(edata, "Allocation of frequent reused failed");
edata = pai_alloc(tsdn, &shard->pai, HUGEPAGE + PAGE, PAGE, false,
false, /* frequent_reuse */ true, &deferred_work_generated);
expect_ptr_null(edata, "Allocation of larger than hugepage succeeded");
destroy_test_data(shard);
}
TEST_END
@@ -273,7 +286,7 @@ TEST_BEGIN(test_alloc_dalloc_batch) {
edata_list_active_t allocs_list;
edata_list_active_init(&allocs_list);
size_t nsuccess = pai_alloc_batch(tsdn, &shard->pai, PAGE, NALLOCS / 2,
&allocs_list, &deferred_work_generated);
&allocs_list, /* frequent_reuse */ false, &deferred_work_generated);
expect_zu_eq(NALLOCS / 2, nsuccess, "Unexpected oom");
for (size_t i = NALLOCS / 2; i < NALLOCS; i++) {
allocs[i] = edata_list_active_first(&allocs_list);

2
test/unit/sec.c
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@@ -73,7 +73,7 @@ pai_test_allocator_alloc(tsdn_t *tsdn, pai_t *self, size_t size,
static inline size_t
pai_test_allocator_alloc_batch(tsdn_t *tsdn, pai_t *self, size_t size,
size_t nallocs, edata_list_active_t *results,
size_t nallocs, edata_list_active_t *results, bool frequent_reuse,
bool *deferred_work_generated) {
pai_test_allocator_t *ta = (pai_test_allocator_t *)self;
if (ta->alloc_fail) {