Re: [Xen-users] Strange networking issues

[Nico Kadel-Garcia <nkadel@xxxxxxxxx>]

Simon Pearson wrote:
> I have recently installed Xen 3.0.3 from Debian binaries (Etch) which
> was very painless and made the installation process very simple. I was
> very impressed.
>
> Having setup/configured Xen for 3 domUs, using xen-tools to setup the
> machines, so far so good; that is until one of the guest domains
> encounters a slight load. 
>   
> Upon a domU encountering load (e.g. an rsync, make, ...) network
> performance becomes poor, and ICMP works as proof of concept; whilst the
> domU is under load, every ping consistently rises to 30-80ms - and this
> is just pinging the dom0 IP from a domU! Note that I initially thought
> this could have been a NIC issue as eth0 is a tg3-based NIC, however
> swapping the cat5 over to eth1 (e100-based NIC) the problem still
> exists. I am using bridging.
>   
I wonder if you're RAM strapped and swapping like mad? rsync over SSH, 
for example, is a serious load.
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