Re: [Xen-devel] some thoughts about merlot{0|1} issues [was: Re: [xen-unstable test] 102522: tolerable FAIL - PUSHED]

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On Mon, 2016-11-28 at 08:48 -0500, Boris Ostrovsky wrote:
> On 11/24/2016 10:31 AM, Jan Beulich wrote:
> > 
> > This indeed looks surprising for a half way modern system - is the
> > BIOS perhaps limiting C-states (maybe instructed to via BIOS
> > setup)?
> 
> IIRC some BIOSes indeed provided an option to disable C2. Dumping
> SSDT
> would tell us whether C2 is there is BIOS is not accessible.
> 
I will try to extract that.

In any case, what I'm wondering is, could this ACPI / PM thing be
linked to the behavior we are seeing?

I'm not sure I see how... perhaps the system gets too hot and its
throttled down? (Yes, shooting in the dark, I know.)

Regards,
Dario
-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
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Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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