Re: Performance difference between Xen versions

[John Weekes <lists.xen@nuclearfallout.net>]

On 5/2/2011 11:12 AM, Konrad Rzeszutek Wilk wrote:
> On Mon, May 02, 2011 at 10:52:45AM -0700, John Weekes wrote:
>> Or I am I just missing something entirely here?
> Oh? I think git commit a3ca5a20ec9d5c4917271021d49768961e7a8421
> Author: Yu Ke<ke.yu@intel.com>
> Date:   Thu Apr 28 09:50:55 2011 -0400
>
>      xen/acpi: add xen acpi processor driver
>
>      Xen hypervisor need parsed acpi processor info for CPU Cx/Px power management,
>      so this patch introduces xen acpi processor driver to parse the acpi info,
>      and notify the hypervisor upon receiving the info.
>
>      This patch has two components:
>       - driver/acpi/processor_xen.c: implement the xen acpi processor driver
>       - drivers/xen/acpi_processor.c: provide the interface to notify Xen hypervisor
>
> adds it in the 2.6.32 tree?

Thanks, Konrad.

It looks like the commit in question is actually this one, from March 
2010: 
http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=commit;h=7529008534a694c5784dfb11aa46184e33adc227. 
My search didn't find it because the files don't use the string 
"px_pminfo" anywhere.

The important thing that I missed on my end was not having the ACPI 
processor driver selected (for some reason). I had cpufreq and ACPI 
enabled, but I needed that, as well.

-John