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SC: Remove global data.

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The global data is mostly only used at initialization, or for easy access to
values we could compute statically.  Instead of consuming that space (and
risking TLB misses), we can just pass around a pointer to stack data during
bootstrapping.
This commit is contained in:
David Goldblatt 2018-07-19 17:08:10 -07:00 • committed by David Goldblatt
parent 4bc48718b2
commit 3aba072cef
16 changed files with 73 additions and 73 deletions
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19
src/jemalloc.c
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@ -920,7 +920,7 @@ malloc_slow_flag_init(void) {
}
static void
malloc_conf_init(void) {
malloc_conf_init(sc_data_t *sc_data) {
unsigned i;
char buf[PATH_MAX + 1];
const char *opts, *k, *v;
@ -1254,7 +1254,7 @@ malloc_conf_init(void) {
&pgs);
if (!err) {
sc_data_update_slab_size(
&sc_data_global, slab_start,
sc_data, slab_start,
slab_end, (int)pgs);
} else {
malloc_conf_error(
@ -1368,6 +1368,11 @@ static bool
malloc_init_hard_a0_locked() {
malloc_initializer = INITIALIZER;
JEMALLOC_DIAGNOSTIC_PUSH
JEMALLOC_DIAGNOSTIC_IGNORE_MISSING_STRUCT_FIELD_INITIALIZERS
sc_data_t sc_data = {0};
JEMALLOC_DIAGNOSTIC_POP
/*
* Ordering here is somewhat tricky; we need sc_boot() first, since that
* determines what the size classes will be, and then
@ -1375,10 +1380,10 @@ malloc_init_hard_a0_locked() {
* before sz_boot and bin_boot, which assume that the values they read
* out of sc_data_global are final.
*/
sc_boot();
malloc_conf_init();
sz_boot(&sc_data_global);
bin_boot(&sc_data_global);
sc_boot(&sc_data);
malloc_conf_init(&sc_data);
sz_boot(&sc_data);
bin_boot(&sc_data);
if (config_prof) {
prof_boot0();
@ -1407,7 +1412,7 @@ malloc_init_hard_a0_locked() {
if (config_prof) {
prof_boot1();
}
arena_boot();
arena_boot(&sc_data);
if (tcache_boot(TSDN_NULL)) {
return true;
}