From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030531Ab2CVTV5 (ORCPT ); Thu, 22 Mar 2012 15:21:57 -0400 Received: from e9.ny.us.ibm.com ([32.97.182.139]:49519 "EHLO e9.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754793Ab2CVTV4 (ORCPT ); Thu, 22 Mar 2012 15:21:56 -0400 Message-ID: <4F6B7BAB.5050902@linaro.org> Date: Thu, 22 Mar 2012 12:21:15 -0700 From: John Stultz User-Agent: Mozilla/5.0 (X11; Linux i686; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 MIME-Version: 1.0 To: Sasha Levin CC: Dave Jones , Fedora Kernel Team , Linux Kernel , Thomas Gleixner Subject: Re: WARNING: Adjusting tsc more then 11% References: <20120305154411.GA29668@redhat.com> <1330972323.2191.74.camel@work-vm> <20120305192338.GA30491@redhat.com> <1330977010.2191.84.camel@work-vm> <20120305195758.GA25498@redhat.com> <1330979254.2191.98.camel@work-vm> <1331082811.2191.167.camel@work-vm> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12032219-7182-0000-0000-00000119DE7E Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/22/2012 12:11 PM, Sasha Levin wrote: > On Wed, Mar 7, 2012 at 3:13 AM, John Stultz wrote: >> On Mon, 2012-03-05 at 22:36 +0200, Sasha Levin wrote: >>> On Mon, Mar 5, 2012 at 10:27 PM, John Stultz wrote: >>>> On Mon, 2012-03-05 at 22:16 +0200, Sasha Levin wrote: >>>>> On Mon, Mar 5, 2012 at 9:57 PM, Dave Jones wrote: >>>>>> On Mon, Mar 05, 2012 at 11:50:10AM -0800, John Stultz wrote: >>>>>> >>>>>> > So it would be great to get further feedback from folks who are seeing >>>>>> > this warning, so we can really hammer this out, but I don't want the >>>>>> > warning spooking anyone into thinking things are terribly broken. >>>>>> >>>>>> One of the reports was from someone using vbox. I'm now wondering if >>>>>> the other users are using some other flavour of virt. I'll ask. >>>>> I've reported this issue with regards to KVM before >>>>> (http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/85632) but >>>>> according to this thread it's not really KVM specific. >>>>> >>>>> It's easily reproducible using Dave's trinity running inside a KVM guest. >>>> Great! Do you have a link to trinity? (Google just gives me a video of >>>> its use and links to various churches) >>> Sure, the git tree is here: codemonkey.org.uk/projects/trinity/trinity.git >>> >>> Basically just start 2*vcpu instances of trinity inside the guest and >>> wait a bit. >> So I left trinity running in a 2vcpu kvm guest for ~5 hours and haven't >> seen anything yet. Could you send me a .config for the guest kernel and >> maybe your kvm command line? >> >> Also, it shouldn't really matter, but are the guests 32bit or 64bit? >> >> thanks >> -john >> >> > Sorry, I missed this mail. > > You should start several trinity instances, probably 4-5 on a 2vcpu guest. > Ah. Sorry I misread the 2*vcpu as "on a 2 vcpu instance". Thanks for the clarification. Re-running tests now. thanks -john