From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Weekes Subject: Re: Performance difference between Xen versions Date: Mon, 02 May 2011 11:43:58 -0700 Message-ID: <4DBEFB6E.4090201@nuclearfallout.net> References: <4DBE41C9.1010409@ts.fujitsu.com> <4DBE7819020000780003F1B6@vpn.id2.novell.com> <4DBEEF6D.8080204@nuclearfallout.net> <20110502181222.GB7498@dumpdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20110502181222.GB7498@dumpdata.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Konrad Rzeszutek Wilk Cc: mark.langsdorf@amd.com, "xen-devel@lists.xensource.com" , winston.l.wang@intel.com, gang.wei@intel.com List-Id: xen-devel@lists.xenproject.org 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 > 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