[CentOS-virt] xen dom0/domU network speed

Tue Dec 11 19:11:48 UTC 2007
David Kostal <david.kostal at gmail.com>


> > 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.

The same hw without Xen can handle several 1Gbps (tested with 2)
simultaneous streams (doesn't matter whether in- or out-going).

I think this is really Xen (vif-eth) speed issue which may or may not
be possible to optimize, as there is really a lot of additional packet
copying in the dom0 (and also domU is applicable).

So my question is more like - is there anyone who can get 1Gbps
throuput on domU (or Dom0) eth0  under Xen?

Or do I have to assign the network card HW directly to the dom0/domU
where I need full network speed?


david.kostal at gmail.com