[PATCH] arch_timer: Move delay timer to drivers clocksource

Daniel Lezcano daniel.lezcano at linaro.org
Fri Jan 17 04:12:35 EST 2014


On 01/17/2014 10:07 AM, Antti Miettinen wrote:
> Will Deacon <will.deacon at arm.com> writes:
>> Why can't you use the C3STOP feature so that the arch-timer isn't used when
>> you go idle?
>
> That would mean falling back to broadcast timer, right? That's not
> necessarily on the local CPU so wakeups would often wake two CPUs.

You can prevent that if the hardware supports it with the 
CLOCK_EVT_DYNIRQ flag on the broadcast timer.

> Does
> anyone have patches for using a CPU local timer as a fallback for
> C3STOP timers?



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