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HPA: Make slab sizes and maxes configurable.

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This allows easy experimentation with them as tuning parameters.
This commit is contained in:
David Goldblatt 2020-09-04 15:22:47 -07:00 • committed by David Goldblatt
parent 1c7da33317
commit bf025d2ec8
7 changed files with 37 additions and 10 deletions
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16
src/jemalloc.c
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@ -136,6 +136,8 @@ malloc_mutex_t arenas_lock;
/* The global hpa, and whether it's on. */
bool opt_hpa = false;
size_t opt_hpa_slab_goal = 512 * 1024;
size_t opt_hpa_slab_max_alloc = 256 * 1024;
/*
* Arenas that are used to service external requests. Not all elements of the
@ -1481,6 +1483,17 @@ malloc_conf_init_helper(sc_data_t *sc_data, unsigned bin_shard_sizes[SC_NBINS],
CONF_CHECK_MIN, CONF_CHECK_MAX,
true);
CONF_HANDLE_BOOL(opt_hpa, "hpa")
/*
* If someone violates these mins and maxes, they're
* confused.
*/
CONF_HANDLE_SIZE_T(opt_hpa_slab_goal, "hpa_slab_goal",
PAGE, 512 * PAGE, CONF_CHECK_MIN, CONF_CHECK_MAX,
true)
CONF_HANDLE_SIZE_T(opt_hpa_slab_max_alloc,
"hpa_slab_max_alloc", PAGE, 512 * PAGE,
CONF_CHECK_MIN, CONF_CHECK_MAX, true)
if (CONF_MATCH("slab_sizes")) {
if (CONF_MATCH_VALUE("default")) {
sc_data_init(sc_data);
@ -1787,7 +1800,8 @@ malloc_init_hard_a0_locked() {
&a0->pa_shard.edata_cache)) {
return true;
}
if (pa_shard_enable_hpa(&a0->pa_shard, &arena_hpa_global)) {
if (pa_shard_enable_hpa(&a0->pa_shard, &arena_hpa_global,
opt_hpa_slab_goal, opt_hpa_slab_max_alloc)) {
return true;
}
}