Re: [Xen-users] Strange networking issues

To:	Simon Pearson <simon@xxxxxxxxxxxxx>
Subject:	Re: [Xen-users] Strange networking issues
From:	Nico Kadel-Garcia <nkadel@xxxxxxxxx>
Date:	Sun, 15 Apr 2007 11:32:10 +0100
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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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Re: [Xen-users] Strange networking issues