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psset: Add stats

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This commit is contained in:
David Goldblatt
2020-09-02 12:59:10 -07:00
committed by David Goldblatt
parent 018b162d67
commit 259c5e3e8f
4 changed files with 178 additions and 13 deletions
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78
test/unit/psset.c
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@@ -295,6 +295,81 @@ TEST_BEGIN(test_multi_pageslab) {
}
TEST_END
static void
stats_expect_empty(psset_bin_stats_t *stats) {
assert_zu_eq(0, stats->npageslabs,
"Supposedly empty bin had positive npageslabs");
expect_zu_eq(0, stats->nactive, "Unexpected nonempty bin"
"Supposedly empty bin had positive nactive");
expect_zu_eq(0, stats->ninactive, "Unexpected nonempty bin"
"Supposedly empty bin had positive ninactive");
}
static void
stats_expect(psset_t *psset, size_t nactive) {
if (nactive == PAGESLAB_PAGES) {
expect_zu_eq(1, psset->full_slab_stats.npageslabs,
"Expected a full slab");
expect_zu_eq(PAGESLAB_PAGES, psset->full_slab_stats.nactive,
"Should have exactly filled the bin");
expect_zu_eq(0, psset->full_slab_stats.ninactive,
"Should never have inactive pages in a full slab");
} else {
stats_expect_empty(&psset->full_slab_stats);
}
size_t ninactive = PAGESLAB_PAGES - nactive;
pszind_t nonempty_pind = PSSET_NPSIZES;
if (ninactive != 0 && ninactive < PAGESLAB_PAGES) {
nonempty_pind = sz_psz2ind(sz_psz_quantize_floor(
ninactive << LG_PAGE));
}
for (pszind_t i = 0; i < PSSET_NPSIZES; i++) {
if (i == nonempty_pind) {
assert_zu_eq(1, psset->slab_stats[i].npageslabs,
"Should have found a slab");
expect_zu_eq(nactive, psset->slab_stats[i].nactive,
"Mismatch in active pages");
expect_zu_eq(ninactive, psset->slab_stats[i].ninactive,
"Mismatch in inactive pages");
} else {
stats_expect_empty(&psset->slab_stats[i]);
}
}
}
TEST_BEGIN(test_stats) {
bool err;
edata_t pageslab;
memset(&pageslab, 0, sizeof(pageslab));
edata_t alloc[PAGESLAB_PAGES];
edata_init(&pageslab, /* arena_ind */ 0, PAGESLAB_ADDR, PAGESLAB_SIZE,
/* slab */ true, SC_NSIZES, PAGESLAB_SN, extent_state_active,
/* zeroed */ false, /* comitted */ true, EXTENT_PAI_HPA,
EXTENT_IS_HEAD);
psset_t psset;
psset_init(&psset);
stats_expect(&psset, 0);
edata_init_test(&alloc[0]);
psset_alloc_new(&psset, &pageslab, &alloc[0], PAGE);
for (size_t i = 1; i < PAGESLAB_PAGES; i++) {
stats_expect(&psset, i);
edata_init_test(&alloc[i]);
err = psset_alloc_reuse(&psset, &alloc[i], PAGE);
expect_false(err, "Nonempty psset failed page allocation.");
}
stats_expect(&psset, PAGESLAB_PAGES);
for (ssize_t i = PAGESLAB_PAGES - 1; i >= 0; i--) {
edata_t *ps = psset_dalloc(&psset, &alloc[i]);
expect_true((ps == NULL) == (i != 0),
"psset_dalloc should only evict a slab on the last free");
stats_expect(&psset, i);
}
}
TEST_END
int
main(void) {
return test_no_reentrancy(
@@ -302,5 +377,6 @@ main(void) {
test_fill,
test_reuse,
test_evict,
test_multi_pageslab);
test_multi_pageslab,
test_stats);
}