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Re: [Xen-devel] Performance difference between Xen versions

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-devel] Performance difference between Xen versions
From: John Weekes <lists.xen@xxxxxxxxxxxxxxxxxx>
Date: Mon, 02 May 2011 11:43:58 -0700
Cc: mark.langsdorf@xxxxxxx, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, winston.l.wang@xxxxxxxxx, gang.wei@xxxxxxxxx
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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@xxxxxxxxx>
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 
     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 

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.


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