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HPA: Manage whole hugepages at a time.

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This redesigns the HPA implementation to allow us to manage hugepages all at
once, locally, without relying on a global fallback.
This commit is contained in:
David Goldblatt
2020-11-09 13:49:30 -08:00
committed by David Goldblatt
parent 63677dde63
commit 43af63fff4
16 changed files with 700 additions and 550 deletions
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37
src/jemalloc.c
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@@ -1802,31 +1802,19 @@ malloc_init_hard_a0_locked() {
}
a0 = arena_get(TSDN_NULL, 0, false);
if (opt_hpa && LG_SIZEOF_PTR == 2) {
if (opt_hpa && !hpa_supported()) {
malloc_printf("<jemalloc>: HPA not supported in the current "
"configuration; %s.",
opt_abort_conf ? "aborting" : "disabling");
if (opt_abort_conf) {
malloc_printf("<jemalloc>: Hugepages not currently "
"supported on 32-bit architectures; aborting.");
malloc_abort_invalid_conf();
} else {
malloc_printf("<jemalloc>: Hugepages not currently "
"supported on 32-bit architectures; disabling.");
opt_hpa = false;
}
} else if (opt_hpa) {
/*
* The global HPA uses the edata cache from a0, and so needs to
* be initialized specially, after a0 is. The arena init code
* handles this case specially, and does not turn on the HPA for
* a0 when opt_hpa is true. This lets us do global HPA
* initialization against a valid a0.
*/
if (hpa_init(&arena_hpa_global, b0get(), &arena_emap_global,
&a0->pa_shard.edata_cache)) {
return true;
}
if (pa_shard_enable_hpa(&a0->pa_shard, &arena_hpa_global,
opt_hpa_slab_goal, opt_hpa_slab_max_alloc,
opt_hpa_small_max, opt_hpa_large_min, opt_hpa_sec_nshards,
opt_hpa_sec_max_alloc, opt_hpa_sec_max_bytes)) {
if (pa_shard_enable_hpa(&a0->pa_shard, opt_hpa_slab_max_alloc,
opt_hpa_sec_nshards, opt_hpa_sec_max_alloc,
opt_hpa_sec_max_bytes)) {
return true;
}
}
@@ -4346,9 +4334,6 @@ _malloc_prefork(void)
}
}
}
if (i == 4 && opt_hpa) {
hpa_prefork4(tsd_tsdn(tsd), &arena_hpa_global);
}
}
prof_prefork1(tsd_tsdn(tsd));
@@ -4388,9 +4373,6 @@ _malloc_postfork(void)
arena_postfork_parent(tsd_tsdn(tsd), arena);
}
}
if (opt_hpa) {
hpa_postfork_parent(tsd_tsdn(tsd), &arena_hpa_global);
}
prof_postfork_parent(tsd_tsdn(tsd));
if (have_background_thread) {
background_thread_postfork_parent(tsd_tsdn(tsd));
@@ -4421,9 +4403,6 @@ jemalloc_postfork_child(void) {
arena_postfork_child(tsd_tsdn(tsd), arena);
}
}
if (opt_hpa) {
hpa_postfork_child(tsd_tsdn(tsd), &arena_hpa_global);
}
prof_postfork_child(tsd_tsdn(tsd));
if (have_background_thread) {
background_thread_postfork_child(tsd_tsdn(tsd));