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Implement process_madvise support.

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Add opt.process_madvise_max_batch which determines if process_madvise is enabled
(non-zero) and the max # of regions in each batch.  Added another limiting
factor which is the space to reserve on stack, which results in the max batch of
128.
This commit is contained in:
Qi Wang 2025-02-04 18:31:11 -08:00 • committed by Qi Wang
parent 70f019cd3a
commit 22440a0207
13 changed files with 204 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

12
include/jemalloc/internal/extent.h
View file

@ -21,6 +21,16 @@
#define LG_EXTENT_MAX_ACTIVE_FIT_DEFAULT 6
extern size_t opt_lg_extent_max_active_fit;
#define PROCESS_MADVISE_MAX_BATCH_DEFAULT 0
extern size_t opt_process_madvise_max_batch;
#ifdef JEMALLOC_HAVE_PROCESS_MADVISE
/* The iovec is on stack. Limit the max batch to avoid stack overflow. */
#define PROCESS_MADVISE_MAX_BATCH_LIMIT (VARIABLE_ARRAY_SIZE_MAX / sizeof(struct iovec))
#else
#define PROCESS_MADVISE_MAX_BATCH_LIMIT 0
#endif
edata_t *ecache_alloc(tsdn_t *tsdn, pac_t *pac, ehooks_t *ehooks,
ecache_t *ecache, edata_t *expand_edata, size_t size, size_t alignment,
bool zero, bool guarded);
@ -42,6 +52,8 @@ edata_t *extent_alloc_wrapper(tsdn_t *tsdn, pac_t *pac, ehooks_t *ehooks,
bool growing_retained);
void extent_dalloc_wrapper(tsdn_t *tsdn, pac_t *pac, ehooks_t *ehooks,
edata_t *edata);
void extent_dalloc_wrapper_purged(tsdn_t *tsdn, pac_t *pac, ehooks_t *ehooks,
edata_t *edata);
void extent_destroy_wrapper(tsdn_t *tsdn, pac_t *pac, ehooks_t *ehooks,
edata_t *edata);
bool extent_commit_wrapper(tsdn_t *tsdn, ehooks_t *ehooks, edata_t *edata,

3
include/jemalloc/internal/jemalloc_internal_defs.h.in
View file

@ -345,6 +345,9 @@
*/
#undef JEMALLOC_MADVISE_NOCORE
/* Defined if process_madvise(2) is available. */
#undef JEMALLOC_HAVE_PROCESS_MADVISE
/* Defined if mprotect(2) is available. */
#undef JEMALLOC_HAVE_MPROTECT

7
include/jemalloc/internal/jemalloc_preamble.h.in
View file

@ -87,6 +87,13 @@ static const bool have_madvise_huge =
false
#endif
;
static const bool have_process_madvise =
#ifdef JEMALLOC_HAVE_PROCESS_MADVISE
true
#else
false
#endif
;
static const bool config_fill =
#ifdef JEMALLOC_FILL
true

1
include/jemalloc/internal/pages.h
View file

@ -121,6 +121,7 @@ bool pages_commit(void *addr, size_t size);
bool pages_decommit(void *addr, size_t size);
bool pages_purge_lazy(void *addr, size_t size);
bool pages_purge_forced(void *addr, size_t size);
bool pages_purge_process_madvise(void *vec, size_t ven_len, size_t total_bytes);
bool pages_huge(void *addr, size_t size);
bool pages_nohuge(void *addr, size_t size);
bool pages_collapse(void *addr, size_t size);

4
include/jemalloc/internal/typed_list.h
View file

@ -22,6 +22,10 @@ static inline el_type * \
list_type##_last(const list_type##_t *list) { \
return ql_last(&list->head, linkage); \
} \
static inline el_type * \
list_type##_next(const list_type##_t *list, el_type *item) { \
return ql_next(&list->head, item, linkage); \
} \
static inline void \
list_type##_append(list_type##_t *list, el_type *item) { \
ql_elm_new(item, linkage); \