Re: [Xen-devel] [Fedora-xen] Xen/Linux 3.4.2 performance

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 02.08.12 at 18:51, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
> Michael openned a bug and on it we found that the xen-acpi-processor.off=1
> would solve the performance problem. What that does is to not upload C-states
> and P-states information to the hypervisor. So I pulled up an AMD box
> and found that the problem is only if hypervisor enters C-2 states. If
> I do 'xenpm set-max-cstate 1' it gets back to working nicely.
> 
> Wei, any ideas? This is with Xen 4.1

Is that 4.1 you're using lacking a backport of -unstable
25195:a06e6cdeafe3 (4.1-testing 23298:435493696053)?

Jan


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