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HPA: Purge across retained extents.

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This lets us cut down on the number of expensive system calls we perform.
This commit is contained in:
David Goldblatt 2021-06-03 13:29:02 -07:00 • committed by David Goldblatt
parent 347523517b
commit 41fd56605e
4 changed files with 160 additions and 25 deletions
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5
include/jemalloc/internal/hpdata.h
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@ -110,7 +110,7 @@ struct hpdata_s {
*/
size_t h_ntouched;
/* The dirty pages (using the same definition as above). */
/* The touched pages (using the same definition as above). */
fb_group_t touched_pages[FB_NGROUPS(HUGEPAGE_PAGES)];
};
@ -356,6 +356,7 @@ void hpdata_unreserve(hpdata_t *hpdata, void *begin, size_t sz);
typedef struct hpdata_purge_state_s hpdata_purge_state_t;
struct hpdata_purge_state_s {
size_t npurged;
size_t ndirty_to_purge;
fb_group_t to_purge[FB_NGROUPS(HUGEPAGE_PAGES)];
size_t next_purge_search_begin;
};
@ -372,7 +373,7 @@ struct hpdata_purge_state_s {
* until you're done, and then end. Allocating out of an hpdata undergoing
* purging is not allowed.
*
* Returns the number of pages that will be purged.
* Returns the number of dirty pages that will be purged.
*/
size_t hpdata_purge_begin(hpdata_t *hpdata, hpdata_purge_state_t *purge_state);