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[Xen-devel] Re: DomU Powernow question

On 15 Jun 2006, at 11:38, Christian Roessner wrote:

My question is, why the cpu frequency in dom0 ist not jumping to 2GHz,
if the cpu usage inside a domU is very high?

I'm not sure what triggers frequency changes in the dom0 kernel. It is probably not accounting for work done in other domains. That would likely require a new policy kernel module, or a user-space daemon to gather stats from other domains.

Second question: If in dom0, which value is showing the correct
information: the frequency or the bogomips? Normally the latter would
change, if the frequency changes. Not so in dom0? Why?

The code to recompute bogomips is in a file that is not compiled for Xen.

 -- Keir

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