diff options
| author | Juri Lelli <juri.lelli@arm.com> | 2016-07-29 14:04:11 +0100 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2016-08-10 15:15:46 -0700 |
| commit | 4a5e890ec60d2e341fa560d8149997f5f0c48d67 (patch) | |
| tree | 3b2003f0fc4f86dd6bff31cb61d0a24f4a94ebce /kernel/sysctl.c | |
| parent | 2e9abbc942e6211f9ac4dadb14debc39bb9d1418 (diff) | |
sched/fair: add tunable to force selection at cpu granularity
EAS assumes that clusters with smaller capacity cores are more
energy-efficient. This may not be true on non-big-little devices,
so EAS can make incorrect cluster selections when finding a CPU
to wake. The "sched_is_big_little" hint can be used to cause a
cpu-based selection instead of cluster-based selection.
This change incorporates the addition of the sync hint enable patch
EAS did not honour synchronous wakeup hints, a new sysctl is
created to ask EAS to use this information when selecting a CPU.
The control is called "sched_sync_hint_enable".
Also contains:
EAS: sched/fair: for SMP bias toward idle core with capacity
For SMP devices, on wakeup bias towards idle cores that have capacity
vs busy devices that need a higher OPP
eas: favor idle cpus for boosted tasks
BUG: 29533997
BUG: 29512132
Change-Id: I0cc9a1b1b88fb52916f18bf2d25715bdc3634f9c
Signed-off-by: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Srinath Sridharan <srinathsr@google.com>
eas/sched/fair: Favoring busy cpus with low OPPs
BUG: 29533997
BUG: 29512132
Change-Id: I9305b3239698d64278db715a2e277ea0bb4ece79
Signed-off-by: Juri Lelli <juri.lelli@arm.com>
Diffstat (limited to 'kernel/sysctl.c')
| -rw-r--r-- | kernel/sysctl.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index cc0bf3ecdbda..4671761ae3c5 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -304,6 +304,20 @@ static struct ctl_table kern_table[] = { .extra2 = &max_sched_granularity_ns, }, { + .procname = "sched_is_big_little", + .data = &sysctl_sched_is_big_little, + .maxlen = sizeof(unsigned int), + .mode = 0644, + .proc_handler = proc_dointvec, + }, + { + .procname = "sched_sync_hint_enable", + .data = &sysctl_sched_sync_hint_enable, + .maxlen = sizeof(unsigned int), + .mode = 0644, + .proc_handler = proc_dointvec, + }, + { .procname = "sched_cstate_aware", .data = &sysctl_sched_cstate_aware, .maxlen = sizeof(unsigned int), |