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xen-devel
Re: [Xen-devel] performance problems
On Fri, Feb 04, 2005 at 01:08:31PM -0000, Ian Pratt wrote:
>
>
> > yup. the only difference was that I didn't touch dumU's
> > kernel config; in
> > dom0 I already disabled the debugging flags (except magic
> > sysreq), but in
> > default domU's config they were still enabled.
> >
> > Overall impression from my newer benchmark experiments:
> >
> > - Harddisk IO is about 30% faster in XenU than in vmware ws
> > (both accessing
> > the same raw partition)
> > - Network IO is at the same level in xenU and vmware, which
> > is about 30%
> > slower than dom0/native net io (netpipe, 2 machines using
> > 1000Mbit ethernet
> > connected via a switch, xenU and vmware bridged).
>
> It's odd to see such a drop in network performance unless you're on a
> machine with a slow CPU. It should be possible to saturate a Gigabit
> Ethernet (900Mb/s) with a relatively modern CPU. What are you using?
its an athlon XP 2100+, so it isn't _so_ slow...
if someone wants to take a look at the netpipe-tcp results:
http://www.physik.fu-berlin.de/~glaweh/netpipe-xen-benchmark.pdf
--
c u
henning
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