[libvirt] is it possible to set txqueuelen on vnetX devices automatically

Tim Hughes thughes at thegoldfish.org
Mon Apr 2 17:03:50 UTC 2012


Thankyou , I should be able to do it with the hooks. I have raised a
feature request at BZ809172

Tim Hughes
mailto:thughes at thegoldfish.org




On 2 April 2012 17:22, Daniel P. Berrange <berrange at redhat.com> wrote:

> On Mon, Apr 02, 2012 at 05:15:55PM +0100, Tim Hughes wrote:
> > Hello,
> >
> > We have been tuning our libvirt hosts and discovered that setting the
> > txqueuelen on vnetX devices to 2500 we can increase the network
> throughput
> > by a factor of almost 10. On an eth device it can be set by
>  hand/rc.local
> > with the following instructions
> >
> http://www.cyberciti.biz/faq/gentoo-centos-rhel-debian-fedora-increasing-txqueuelen/
> > .  Because vnetX devices are named on a 'first free' basis and they come
> > and go with the guests the rc.local method is not going to work. I think
> > this needs to be done via libvirt or possibly udev, maybe with some kind
> of
> > hook. Ideally I would like to be able to set this automatically for all
> > vnetX devices when they are created or even better, on a per guest basis.
>
> You can probably do this with a hook script:
>
>  http://libvirt.org/hooks.html
>
> Please also file a BZ requesting that this tunable be directly supported
> by libvirt.
>
> Daniel
> --
> |: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/:|
> |: http://libvirt.org              -o-             http://virt-manager.org:|
> |: http://autobuild.org       -o-         http://search.cpan.org/~danberr/:|
> |: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc:|
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/libvir-list/attachments/20120402/6996e166/attachment-0001.htm>


More information about the libvir-list mailing list