Re: [Xen-users] network performance in 0 and U

[Ernst Bachmann <e.bachmann@xxxxxxxx>]

On Tuesday 20 September 2005 21:28, fd0 wrote:
> I've noticed that in dom0 I can practically max out my bandwidth,
> but in domU it's limited to about half of it.
> What should I do to improve that? :)

check the ifconfig output of your vif devices for TX / RX errors, most likely 
those are what limits your bandwith....

to fix it, upgrade to xen-3/unstable (I haven't tested, but I really hope that 
xen-3 will have reliable networking), don't max out your bandwith in domU, or 
try some of the tweaks described in the recent threads about "ssh hanging", 
"nfs failing", "ping packet loss", etc...

Using a SMP machine and assigning different CPUs to domU and dom0 might also 
help a lot.

/Ernst

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