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

[Brent Verner <brent@xxxxxxxxxxxx>]

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...

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
>
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>

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