Re: [Xen-devel] XEN increases idle power consumption by 25%

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> On 24.08.11 at 21:33, Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
> On 08/24/2011 06:29 AM, Jan Beulich wrote:
>>>>> On 24.08.11 at 14:03, Martin Meier <martin4meier@xxxxxxxxxxxxxx> wrote:
>>> Hi,
>>>
>>> I'm seeing a change in AC idle power consumption from ~23W to ~29W
>>> when changing form 3.1-rc2 to 3.1-rc2 on top of xen-4.2-unstable  with no
>>> domUs running.
>>>
>>> It seems that the CPU never gets into the low power idle state for the whole
>>> CPU-package 'PC6'
>>> and the Vcore voltage never gets below +1.06 V (It get down to 0.7V w/o
>>> xen).
>> This has been discussed recently; see e.g. the thread starting at
>> http://lists.xensource.com/archives/html/xen-devel/2011-08/msg00511.html.
> 
> Also, upstream Linux doesn't have the patches to pass the power state
> stuff through to Xen, which I guess it part of it?

Oh yes, of course.

Jan


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