Re: [Xen-devel] xenpm: opensolaris HVM domU stops getting timer interrupts when C3 used

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 05/01/2010 20:55, "Frank Van Der Linden" <Frank.Vanderlinden@xxxxxxx>
wrote:

> I tried other HVM domains, such as Windows, and they don't seem to have
> the problem. But, they might be more "tickless" than OpenSolaris is.
> 
> I haven't looked at the PM code much yet, and I haven't tried -unstable,
> but there don't seem to be any changes in -unstable that would fix this.
> 
> Is this a known problem? Any hints for diagnosing the problem?

Perhaps CPUs are not being woken from C3 in a timely manner? Could check how
late timers are fired in timer_softirq_action(), perhaps printing largest
missed deadline every few seconds or soemthing like that.

 -- Keir




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