[CentOS-virt] xen dom0/domU network speed

Christopher G. Stach II cgs at ldsys.net
Fri Nov 23 18:44:10 UTC 2007

David Kostal wrote:
> Hi all,
> I have problem reaching 1Gbps network speed with dom0 / domU
> (paravirtualized) on my centos5 installations.
> The fastest speed I measured in domU was about 800/600
> receive/transmit  Mbps, dom0 being a bit slower. I'm using bridging
> (eeither with default xen/centos network-bridge script or with my own
> scripts assigning vlans to bridges).
> Is anyone experiencing same network slowdown?
> Or could it be just some configuration issue on my side?

What do you get on the same hardware running a non-Xen kernel?  What
does the test look like?  You also have to consider that Ethernet is not
100% efficient.

Christopher G. Stach II

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