Re: [Xen-devel] performance problems

[Henning Glawe <eartoaster@xxxxxxx>]

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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