Re: massive performance drop after a while when using virtio nics

Fabian Deutsch
2008-09-09T10:32:17Z

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