Re: [RFC PATCH v2 3/3] sched: introduce synchronized idle injection

From: Peter Zijlstra
Date: Tue Nov 10 2015 - 09:58:34 EST

On Tue, Nov 10, 2015 at 06:01:16AM -0800, Jacob Pan wrote:
> On Tue, 10 Nov 2015 14:23:24 +0100
> Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

> > It looks like what you want is:
> >
> > hrtimer_forward(hrt, period);
> >
> > unconditionally.

> In the ideal world yes. But my thinking was that timers may not be so
> accurate to deliver interrupts, over the time the timeout error may
> accumulate so that eventually timers will be out of sync.

Timers have a global time base. Even if individual deliveries have an
error, there is no accumulated error.

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