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

[Stefan Bader]

On 16.05.2012 17:33, Stefan Bader wrote:
> On 16.05.2012 17:30, Tim Gardner wrote:
>> 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
> 
> I should re-push it after dropping the debugging cruft to make it simpler to
> review. iirc, there was not so much backporting needed but adapting some makefile...

done now

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