Re: kvm somehow exempt from frequency scaling?

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

David Abrahams wrote:
>>>> I'll try to reproduce this locally, right now I'm completely bewildered 
>>>> by this.
>>>>         
>>> FYI, if I listen to the radio in windows media player, I don't see the
>>> effect.  KVM will take 18% or so of the CPU even when not on a visible
>>> workspace.
>>>       
>> And since ubuntu's update to kvm 1:16-1ubuntu2, I can't see the effect
>> at all, no matter what I do.
>>     
>
> I take it back. If I launch kvm and switch to another desktop
> immediately, I can come back a seemingly arbitrary amount of time
> later and it will not have finished booting.  It also never seems to
> force the CPU frequency to 100%.  AFAICT I am seeing exactly what I
> was seeing before.
>   

Argh.

Can you try the following experiments (independently):

- run kvm with the '-no-rtc' option

- disable compiz (or beryl).  I think the menu item is called 'Desktop
Effects'.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.


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