Re: [Xen-users] More Windows network performace issues.

[John McMonagle <johnm@xxxxxxxxxxx>]

On Friday 15 April 2011 05:17:00 am Pasi Kärkkäinen wrote:
> On Thu, Apr 14, 2011 at 10:58:27AM -0500, John McMonagle wrote:
> > Made considerable progress with networking problems.
> > New anti-virus and new gplpv driver helped a lot.
> >
> > I'm still having poor speed to the external network.
> >
> > Dom0 is debian squeeze using the debian dom0 kernel. Xen is 4.0.1 from
> > source.
> >
> > Tested domu windows in server 2008 with new gplpv drivers.
> > Reference debian pv domu is debian squeeze.
> > All are 64 bit.
> > External site is a xen dom0 as it's the fastest available.
> > All tests with iperf in Mbits/sec
> > Did each a few times and they were pretty consistent.
> > I put down the highest number.
> >
> > domu server 2008 > dom0   618
> > domu server 2008 > external 280
> > domu server 2008 > domu squeeze  533
> > domu squeeze > dom0   4000
> > domu squeeze > external  923
> > dom0 > external   933
> >
> > The one that concerns me is:
> > domu server 2008 > external 280
> >
> > Need to access external file shares and that is quite a hit.
> > Why does a hvm domain take an additional hit in the bridging to the
> > external interface?
> >
> > Any ideas?
>
> How many vcpus does windows have?
>
> Did you monitor resource usage using "xm top" and "top" from dom0
> while running the benchmark? How's the CPU usage?
>
> What exact version of gplpv drivers are you using?
> Did you try Linux HVM guest with PV-on-HVM drivers?
>
> -- Pasi

For this test 1 cpu.
Top shows nothing much going on in dom0 during test.
xentop shows both dom0 and domu very busy.
dom0 ~60%  domu ~80%
That was during test to external.
Driver is 0.11.0.288

John


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