Re: [CentOS-virt] xen dom0/domU network speed

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.