From: Mark McLoughlin <markmc@redhat.com>
To: Fabian Deutsch <fabian.deutsch@gmx.de>
Cc: kvm@vger.kernel.org
Subject: Re: massive performance drop after a while when using virtio nics
Date: Tue, 09 Sep 2008 11:22:00 +0100 [thread overview]
Message-ID: <1220955720.12615.28.camel@muff> (raw)
In-Reply-To: <1219519317.2909.12.camel@decade.local>
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?
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.
Cheers,
Mark.
next prev parent reply other threads:[~2008-09-09 10:23 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 [this message]
2008-09-09 10:32 ` Fabian Deutsch
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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