linux-kernel - Re: WARNING: Adjusting tsc more then 11%

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Message-ID: <CA+1xoqe+KfsJK0eV9r8tVW=uTdsh_U=so2A0sE_jFkUNRH2+Ow@mail.gmail.com>
Date:	Thu, 22 Mar 2012 21:11:06 +0200
From:	Sasha Levin <levinsasha928@...il.com>
To:	John Stultz <john.stultz@...aro.org>
Cc:	Dave Jones <davej@...hat.com>,
	Fedora Kernel Team <kernel-team@...oraproject.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: WARNING: Adjusting tsc more then 11%

On Wed, Mar 7, 2012 at 3:13 AM, John Stultz <john.stultz@...aro.org> wrote:
> On Mon, 2012-03-05 at 22:36 +0200, Sasha Levin wrote:
>> On Mon, Mar 5, 2012 at 10:27 PM, John Stultz <john.stultz@...aro.org> wrote:
>> > On Mon, 2012-03-05 at 22:16 +0200, Sasha Levin wrote:
>> >> On Mon, Mar 5, 2012 at 9:57 PM, Dave Jones <davej@...hat.com> 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.

I've attached my .config.

(This issue still happens quite often with linux-next)

Download attachment "config-sasha" of type "application/octet-stream" (119302 bytes)