diff options
| author | Srivatsa Vaddagiri <vatsa@codeaurora.org> | 2016-09-09 19:38:03 +0530 |
|---|---|---|
| committer | Pavankumar Kondeti <pkondeti@codeaurora.org> | 2016-12-16 16:50:52 +0530 |
| commit | 0dee0d1411e4ba837089a769a5bcce57a5a14df2 (patch) | |
| tree | f4d1423b387e4661efb73b32ba7489c48ecb494b /include/linux | |
| parent | f8c7c6ffdfb366efce72a4df93d124659a246b8c (diff) | |
sched: Avoid waking idle cpu for short-burst tasks
Introduce sched_short_burst tunable to classify "short-burst" tasks.
These tasks are eligible for packing to avoid overhead associated with
waking up an idle CPU. select_best_cpu() ignores power-cost and selects
the CPU with least wakeup latency which is not loaded with IRQs and
can accommodate this task without exceeding spill limits. The ties are
broken with load followed by previous CPU.
This policy does not affect cluster selection but only CPU selection
in the selected cluster. The tasks eligible for "wakeup-up-idle" and
"boost" are not considered for packing. This policy is applied for
both "fair" and "rt" scheduling class tasks.
Change-Id: I2a05493fde93f58636725f18d0ce8dbce4418a30
Signed-off-by: Srivatsa Vaddagiri <vatsa@codeaurora.org>
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
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 5d0899df64ff..e4aff5e6e17f 100644 --- a/include/linux/sched/sysctl.h +++ b/include/linux/sched/sysctl.h @@ -68,6 +68,7 @@ extern unsigned int sysctl_sched_freq_aggregate; extern unsigned int sysctl_sched_enable_thread_grouping; extern unsigned int sysctl_sched_freq_aggregate_threshold_pct; extern unsigned int sysctl_sched_prefer_sync_wakee_to_waker; +extern unsigned int sysctl_sched_short_burst; #else /* CONFIG_SCHED_HMP */ |