RE: RE: RE: RE: RE: RE: [Xen-devel] No C-States any longer...

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Carsten Schiers [mailto:carsten@xxxxxxxxxx]
> Sent: Wednesday, June 15, 2011 5:12 PM
> 
> > this looks a bit strange. how about the native log?
> 
> I have not done a log with ACPI_DEBUG enabled. Will do so tonight or
> tomorrow night.
> 
> > what's your dom0 vcpu number? and how about physical cpu?
> 
> dom0_vcpu_pin/xend-config.sxp result in the following excerpt of xm vcpu-list:
> 
>   Name          ID          VCPU          CPU
> State          ...
>   Domain-0      0           0             0
> r--            ...
> 
>   Domain-0      0           1             -
> --p            ...
> 
>   Domain-0      0           2             -
> --p            ...
>   ...
> 
> > there's possibility that in your environment general ACPI code
> > is changed which is not reflected in Xen specific versions.
> 
> I have not understood that.
> 

as you see already, there's some ACPI function duplicated into a Xen specific
version to handle some tricky assumptions, such as 
xen_acpi_processor_get_power_info.
So it's possible that, if same kernel works well natively, those Xen stubs are 
out of
sync with original version. This is not a clean approach, and we need consider 
a better
one for pushing them upstream. :/

Thanks
Kevin

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