Pavankumar Kondeti
f1e9995fe4
sched: add a knob to prefer the waker CPU for sync wakeups
...
The current policy has a preference to select an idle CPU in the waker
cluster compared to the waker CPU running only 1 task. By selecting
an idle CPU, it eliminates the chance of waker migrating to a
different CPU after the wakee preempts it. This policy is also not
susceptible to the incorrect "sync" usage i.e the waker does not
goto sleep after waking up the wakee.
However LPM exit latency associated with an idle CPU outweigh the
above benefits on some targets. So add a knob to prefer the waker
CPU having only 1 runnable task over idle CPUs in the waker cluster.
Change-Id: Id974748c07625c1b19112235f426a5d204dfdb33
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
2016-10-02 10:52:06 +05:30
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