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Geom_grow: Move in advancing logic.

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David Goldblatt 2020-08-07 18:16:31 -07:00 committed by David Goldblatt
parent 131b1b5338
commit ffe552223c
2 changed files with 34 additions and 15 deletions
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27
include/jemalloc/internal/geom_grow.h
View File

@ -21,6 +21,33 @@ struct geom_grow_s {
malloc_mutex_t mtx; malloc_mutex_t mtx;
}; };
static inline bool
geom_grow_size_prepare(geom_grow_t *geom_grow, size_t alloc_size_min,
size_t *r_alloc_size, pszind_t *r_skip) {
*r_skip = 0;
*r_alloc_size = sz_pind2sz(geom_grow->next + *r_skip);
while (*r_alloc_size < alloc_size_min) {
(*r_skip)++;
if (geom_grow->next + *r_skip >=
sz_psz2ind(SC_LARGE_MAXCLASS)) {
/* Outside legal range. */
return true;
}
*r_alloc_size = sz_pind2sz(geom_grow->next + *r_skip);
}
return false;
}
static inline void
geom_grow_size_commit(geom_grow_t *geom_grow, pszind_t skip) {
if (geom_grow->next + skip + 1 <= geom_grow->limit) {
geom_grow->next += skip + 1;
} else {
geom_grow->next = geom_grow->limit;
}
}
bool geom_grow_init(tsdn_t *tsdn, geom_grow_t *geom_grow); bool geom_grow_init(tsdn_t *tsdn, geom_grow_t *geom_grow);
void geom_grow_prefork(tsdn_t *tsdn, geom_grow_t *geom_grow); void geom_grow_prefork(tsdn_t *tsdn, geom_grow_t *geom_grow);
void geom_grow_postfork_parent(tsdn_t *tsdn, geom_grow_t *geom_grow); void geom_grow_postfork_parent(tsdn_t *tsdn, geom_grow_t *geom_grow);

20
src/extent.c
View File

@ -625,17 +625,13 @@ extent_grow_retained(tsdn_t *tsdn, pac_t *pac, ehooks_t *ehooks,
* Find the next extent size in the series that would be large enough to * Find the next extent size in the series that would be large enough to
* satisfy this request. * satisfy this request.
*/ */
pszind_t egn_skip = 0; size_t alloc_size;
size_t alloc_size = sz_pind2sz(pac->geom_grow.next + egn_skip); pszind_t geom_grow_skip;
while (alloc_size < alloc_size_min) { bool err = geom_grow_size_prepare(&pac->geom_grow, alloc_size_min,
egn_skip++; &alloc_size, &geom_grow_skip);
if (pac->geom_grow.next + egn_skip >= if (err) {
sz_psz2ind(SC_LARGE_MAXCLASS)) {
/* Outside legal range. */
goto label_err; goto label_err;
} }
alloc_size = sz_pind2sz(pac->geom_grow.next + egn_skip);
}
edata_t *edata = edata_cache_get(tsdn, pac->edata_cache); edata_t *edata = edata_cache_get(tsdn, pac->edata_cache);
if (edata == NULL) { if (edata == NULL) {
@ -727,12 +723,8 @@ extent_grow_retained(tsdn_t *tsdn, pac_t *pac, ehooks_t *ehooks,
* Increment extent_grow_next if doing so wouldn't exceed the allowed * Increment extent_grow_next if doing so wouldn't exceed the allowed
* range. * range.
*/ */
if (pac->geom_grow.next + egn_skip + 1 <= pac->geom_grow.limit) {
pac->geom_grow.next += egn_skip + 1;
} else {
pac->geom_grow.next = pac->geom_grow.limit;
}
/* All opportunities for failure are past. */ /* All opportunities for failure are past. */
geom_grow_size_commit(&pac->geom_grow, geom_grow_skip);
malloc_mutex_unlock(tsdn, &pac->geom_grow.mtx); malloc_mutex_unlock(tsdn, &pac->geom_grow.mtx);
if (config_prof) { if (config_prof) {