diff options
| author | Joonwoo Park <joonwoop@codeaurora.org> | 2016-03-04 17:15:04 -0800 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 21:25:23 -0700 |
| commit | 16ecb20600bd0aa0037217fa3033e9a03a3f3c69 (patch) | |
| tree | abb69e563a8cae6c2e513aa6cc9cb194e1c23687 /include/linux | |
| parent | 616e04a51cf13b46cbe635a1d74996b596ccb736 (diff) | |
sched: restrict sync wakee placement bias with waker's demand
Biasing sync wakee task towards waker CPU's cluster makes sense when the
waker's demand is high enough so the wakee also can take advantage
of high CPU frequency voted because of waker's load. Placing sync wakee
on the low demand waker's CPU can lead placement imbalance which can
lead unnecessary migration.
Introduce a new tunable "sched_big_waker_task_load" that defines the big
waker so scheduler avoid wakee on waker's cluster bias when the waker's
load is below the tunable.
CRs-fixed: 971295
Change-Id: I1550ede0a71ac8c9be74a7daabe164c6a269a3fb
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
[joonwoop@codeaurora.org: fixed a minor conflict in
include/linux/sched/sysctl.h.]
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/sched/sysctl.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h index b38e77164b40..84bac3e07709 100644 --- a/include/linux/sched/sysctl.h +++ b/include/linux/sched/sysctl.h @@ -68,6 +68,7 @@ extern int sysctl_sched_upmigrate_min_nice; extern unsigned int sysctl_early_detection_duration; extern unsigned int sysctl_sched_boost; extern unsigned int sysctl_sched_small_wakee_task_load_pct; +extern unsigned int sysctl_sched_big_waker_task_load_pct; extern unsigned int sysctl_sched_select_prev_cpu_us; extern unsigned int sysctl_sched_enable_colocation; extern unsigned int sysctl_sched_restrict_cluster_spill; |