Re: [Xen-users] Slow network speed with Xen 3.2-1

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, Sep 11, 2009 at 02:46:53PM -0400, Brent Verner wrote:
> I had a similar problem and the solution was to disable checksum
> offloading in the domU.
> 
> sh# ethtool -K eth0 tx off
> 
> You can add this to your /etc/network/interfaces, too..
> 
>   post-up  ethtool -K eth0 tx off
> 
> 
> I also had to disable this in my dom0 for dhcp to work...
> 

What physical NIC do you have? Sounds like a bug in the driver to me..

What driver/version? "ethtool -i peth0" should tell that.

-- Pasi

> cheers!
>   b
> 
> On Thu, Sep 10, 2009 at 2:19 PM, virtualroot <virtualroot@xxxxxxxxx> wrote:
> > I'm getting a slow network speed (download/upload) domU and dom0
> > limits in 10kbps/20kbps.
> > Booting a kernel without Xen, this doesnt happens
> >
> > /etc/xen/xend-config.sxp
> > (network-script network-bridge)
> > (vif-script vif-bridge)
> > (dom0-min-mem 196)
> > (dom0-cpus 0)
> >
> > cat /etc/xen/XXX.cfg
> > kernel      = '/boot/vmlinuz-2.6.26-1-xen-amd64'
> > ramdisk     = '/boot/initrd.img-2.6.26-1-xen-amd64'
> >
> > memory      = '2048'
> > vcpus = '4'
> >
> > root        = '/dev/sda2 ro'
> > disk        = [
> >                  'phy:/dev/storage/XXX-disk,sda2,w',
> >                  'phy:/dev/storage/XXX-swap,sda1,w',
> >              ]
> >
> > name        = 'XXX'
> > vif         = [ 'ip=190.228.X.X,mac=00:16:3E:37:17:9A' ]
> >
> > root = "/dev/sda2 ro noapic acpi=off nopcmcia noagp nobluetooth"
> > extra = "3 xencons=tty"
> >
> > on_poweroff = 'destroy'
> > on_reboot   = 'restart'
> > on_crash    = 'restart'
> >
> > I use Debian 5.0.2 kernel 2.6.26-1-xen-amd64
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
> >
> 
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