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Add opt.thp which allows explicit hugepage usage.

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"always" marks all user mappings as MADV_HUGEPAGE; while "never" marks all
mappings as MADV_NOHUGEPAGE. The default setting "default" does not change any
settings.  Note that all the madvise calls are part of the default extent hooks
by design, so that customized extent hooks have complete control over the
mappings including hugepage settings.
This commit is contained in:
Qi Wang
2018-02-16 14:19:19 -08:00
committed by Qi Wang
parent efa40532dc
commit e4f090e8df
10 changed files with 143 additions and 29 deletions
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1
test/unit/mallctl.c
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@@ -174,6 +174,7 @@ TEST_BEGIN(test_mallctl_opt) {
TEST_MALLCTL_OPT(bool, tcache, always);
TEST_MALLCTL_OPT(size_t, lg_extent_max_active_fit, always);
TEST_MALLCTL_OPT(size_t, lg_tcache_max, always);
TEST_MALLCTL_OPT(const char *, thp, always);
TEST_MALLCTL_OPT(bool, prof, prof);
TEST_MALLCTL_OPT(const char *, prof_prefix, prof);
TEST_MALLCTL_OPT(bool, prof_active, prof);

2
test/unit/pages.c
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@@ -10,7 +10,7 @@ TEST_BEGIN(test_pages_huge) {
pages = pages_map(NULL, alloc_size, PAGE, &commit);
assert_ptr_not_null(pages, "Unexpected pages_map() error");
if (thp_state_madvise) {
if (init_system_thp_mode == thp_mode_default) {
hugepage = (void *)(ALIGNMENT_CEILING((uintptr_t)pages, HUGEPAGE));
assert_b_ne(pages_huge(hugepage, HUGEPAGE), have_madvise_huge,
"Unexpected pages_huge() result");