From: Fabian Deutsch <fabian.deutsch@gmx.de>
To: Mark McLoughlin <markmc@redhat.com>
Cc: kvm@vger.kernel.org
Subject: Re: massive performance drop after a while when using virtio nics
Date: Tue, 09 Sep 2008 12:32:12 +0200 [thread overview]
Message-ID: <1220956332.3011.4.camel@decade.local> (raw)
In-Reply-To: <1220955720.12615.28.camel@muff>
Am Dienstag, den 09.09.2008, 11:22 +0100 schrieb Mark McLoughlin:
> Hi,
>
> On Sat, 2008-08-23 at 21:21 +0200, Fabian Deutsch wrote:
> > Hey.
> >
> > When running a guest in the following setup, I observ a "massive"
> > performance decrease after a couple of gigabytes of transfrerred data.
> >
> > other guests keep running fine (no regressions) and nothing unusual is
> > observed on the host.
>
> If you do "killall -ALRM qemu-kvm" after the slowdown has occurred, does
> it make things speed up again for a while?
>
It seems so!
Fantastic.
> If so, the issue is fixed by:
>
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ba661292a2bc6ddd305a212b0526e5dc22195fe7
>
> It also got applied in 2.6.26.3 and 2.6.25.16.
>
So it was some signaling-bug on the .. client side?
Cheers!
fabian
next prev parent reply other threads:[~2008-09-09 10:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-23 19:21 massive performance drop after a while when using virtio nics Fabian Deutsch
2008-09-08 12:07 ` Yann Dupont
2008-09-08 13:16 ` Fabian Deutsch
2008-09-08 13:33 ` Yann Dupont
2008-09-09 10:22 ` Mark McLoughlin
2008-09-09 10:32 ` Fabian Deutsch [this message]
2008-09-09 10:47 ` Mark McLoughlin
2008-09-09 11:11 ` Henrik Holst
2008-09-09 11:41 ` Mark McLoughlin
2008-09-09 11:54 ` Yann Dupont
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