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Merge changes from topic "default_psi_kill_mode" 

am: c67350bc68

Change-Id: I1b3f86193a7c2a47829e9fd8403e3b130b79c5fb
This commit is contained in:
Suren Baghdasaryan 2019-10-01 09:46:55 -07:00 committed by android-build-merger
parent da4267b006 970a26aeb7
commit d4e3b4df6e
1 changed files with 21 additions and 4 deletions
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lmkd.c
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@ -83,6 +83,8 @@
#define PROC_STATUS_TGID_FIELD "Tgid:"
#define LINE_MAX 128
#define PERCEPTIBLE_APP_ADJ 200
/* Android Logger event logtags (see event.logtags) */
#define MEMINFO_LOG_TAG 10195355
@ -2046,6 +2048,8 @@ static void mp_event_psi(int data, uint32_t events, struct polling_params *poll_
enum reclaim_state reclaim = NO_RECLAIM;
enum zone_watermark wmark = WMARK_NONE;
char kill_desc[LINE_MAX];
bool cut_thrashing_limit = false;
int min_score_adj = 0;
/* Skip while still killing a process */
if (is_kill_pending()) {
@ -2164,22 +2168,35 @@ static void mp_event_psi(int data, uint32_t events, struct polling_params *poll_
mi.field.free_swap * page_k, swap_low_threshold * page_k);
} else if (wmark < WMARK_HIGH && thrashing > thrashing_limit) {
/* Page cache is thrashing while memory is low */
thrashing_limit = (thrashing_limit * (100 - thrashing_limit_decay_pct)) / 100;
kill_reason = LOW_MEM_AND_THRASHING;
snprintf(kill_desc, sizeof(kill_desc), "%s watermark is breached and thrashing (%"
PRId64 "%%)", wmark > WMARK_LOW ? "min" : "low", thrashing);
cut_thrashing_limit = true;
/* Do not kill perceptible apps because of thrashing */
min_score_adj = PERCEPTIBLE_APP_ADJ;
} else if (reclaim == DIRECT_RECLAIM && thrashing > thrashing_limit) {
/* Page cache is thrashing while in direct reclaim (mostly happens on lowram devices) */
thrashing_limit = (thrashing_limit * (100 - thrashing_limit_decay_pct)) / 100;
kill_reason = DIRECT_RECL_AND_THRASHING;
snprintf(kill_desc, sizeof(kill_desc), "device is in direct reclaim and thrashing (%"
PRId64 "%%)", thrashing);
cut_thrashing_limit = true;
/* Do not kill perceptible apps because of thrashing */
min_score_adj = PERCEPTIBLE_APP_ADJ;
}
/* Kill a process if necessary */
if (kill_reason != NONE) {
int pages_freed = find_and_kill_process(0, kill_desc);
killing = (pages_freed > 0);
int pages_freed = find_and_kill_process(min_score_adj, kill_desc);
if (pages_freed > 0) {
killing = true;
if (cut_thrashing_limit) {
/*
* Cut thrasing limit by thrashing_limit_decay_pct percentage of the current
* thrashing limit until the system stops thrashing.
*/
thrashing_limit = (thrashing_limit * (100 - thrashing_limit_decay_pct)) / 100;
}
}
meminfo_log(&mi);
}