Subject: [PATCH] arch_timer: Move delay timer to drivers clocksource

From: [email-masked] (Daniel Lezcano)
Date: Fri, 17 Jan 2014 11:15:50 +0100

On 01/17/2014 11:11 AM, Prashant Gaikwad wrote:
> On Friday 17 January 2014 02:42 PM, Daniel Lezcano wrote:
>> On 01/17/2014 10:07 AM, Antti Miettinen wrote:
>>> Will Deacon <[email-masked]> 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.
>
> Instead of falling back on broadcast timer, is it possible to fall back
> on other per-CPU timer which is preserved across idle state?

Is it what you are looking for ?

http://lwn.net/Articles/580568/

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

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