linux-kernel - Re: clockevent questions

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Date:	Sun, 13 May 2007 07:52:54 +0200
From:	"Francis Moreau" <francis.moro@...il.com>
To:	tglx@...utronix.de
Cc:	linux-kernel@...r.kernel.org
Subject: Re: clockevent questions

On 5/12/07, Thomas Gleixner <tglx@...utronix.de> wrote:
> On Sat, 2007-05-12 at 22:13 +0200, Francis Moreau wrote:
> > > Yes, it is correct. The generic timer code requests an event in the
> > > future. It does not care, whether the hardware device can handle that or
> > > not. So the clock event code limits the delta to the maximum delta the
> > > device can handle. The interrupt fires and the generic timer code
> > > reschedules the event with the remaining delta time.
> > >
> >
> > Thanks again for explanations. Could you give me a pointer of this reschedules ?
>
> Well, it ends up in hrtimer_interrupt() and the code there finds out,
> that the next timer is not due right now, so it simply requests the same
> (absolute) time event again, which is processed by the clock events code
> and eventually limited to the max delta of the device again.
>

OK, I'll give it a deeper look soon.

Thanks for your great work !
-- 
Francis
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