Some Xen performance data related to the xen-acpi-processor patchset

[Tim Gardner]

On 05/16/2012 09:18 AM, Andy Whitcroft wrote:
> On Wed, May 16, 2012 at 05:05:12PM +0200, Stefan Bader wrote:
>> We got a request[1] to backport some patches which will disable the usual
>> frequency scaling drivers and add a new xen specific one that will make
>> callbacks into the hypervisor to enable p-state control (the hypervisor
>> has no acpi table parser but needs to make those decisions).
>>
>> I have been playing with the proposed patches[2] on an Intel i7 and one AMD
>> Opteron 6128 based system. And finally I also got around to write some CPU
>> intensive test (adding numbers in a loop for each visible VCPU) that gathers the
>> runtime statistics.
> 
> These fixes are all already in Quantal and enabled by default.  So any
> testing we do there helps to validate them also.
> 
> [...]
> 
> -apw
> 
> 
> 

It would also be good to compare your xen-acpi branch non-cherrypick
patches to upstream to make sure they didn't get munged. Otherwise, it
seems like testing indicates these are worthwhile.

rtg
-- 
Tim Gardner tim.gardner at canonical.com