diff options
| author | Joonwoo Park <joonwoop@codeaurora.org> | 2015-08-31 17:21:35 -0700 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 20:02:43 -0700 |
| commit | 07eb3f803b419bdebad45d846113dc069307be90 (patch) | |
| tree | 845a39607dde5f403295b161cbd321ee4e4f3122 /kernel/sysctl.c | |
| parent | fd38bb103d3e0be4796dd9fa19c2d0c90c06cf6a (diff) | |
sched: select task's prev_cpu as the best CPU when it was chosen recently
Select given task's prev_cpu when the task slept for short period to
reduce latency of task placement and migrations. A new tunable
/proc/sys/kernel/sched_select_prev_cpu_us introduced to determine whether
tasks are eligible to go through fast path.
CRs-fixed: 947467
Change-Id: Ia507665b91f4e9f0e6ee1448d8df8994ead9739a
[joonwoop@codeaurora.org: fixed conflict in include/linux/sched.h,
include/linux/sched/sysctl.h, kernel/sched/core.c and kernel/sysctl.c]
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Diffstat (limited to 'kernel/sysctl.c')
| -rw-r--r-- | kernel/sysctl.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 509d59837983..7405bcaf4e0b 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -446,6 +446,13 @@ static struct ctl_table kern_table[] = { .proc_handler = proc_dointvec, }, { + .procname = "sched_select_prev_cpu_us", + .data = &sysctl_sched_select_prev_cpu_us, + .maxlen = sizeof(unsigned int), + .mode = 0644, + .proc_handler = sched_hmp_proc_update_handler, + }, + { .procname = "sched_boost", .data = &sysctl_sched_boost, .maxlen = sizeof(unsigned int), |