Re: [Xen-users] major slow down with xen implementation

[Geoffrey <lists@xxxxxxxxxxxxxxxxxxxxx>]

Todd Deshane wrote:
> On Thu, Sep 25, 2008 at 11:22 AM, Geoffrey <lists@xxxxxxxxxxxxxxxxxxxxx> wrote:
> > We have some fairly robust hardware we are trying to set up a number of
> > para-virtual servers in a clustered environment and we are seeing huge cpu
> > issues.  Specs:
> >
> > Dell 1950: 8 1u servers
> > cpu MHz : 2660.038
> > dual quad cores
> > 32G memory each
> >
> > Our first virual server was configured to use 8G and 4 cores.
> >
> > I tried running a quick test by compiling our application, simply running
> > 'time make.'  The results were terrible:
> >
> > real    0m56.79s
> > user    0m26.53s
> > sys     0m35.46s
> >
> > In comparison, my laptop (Intel Core2 Duo CPU @ 2.50GHz, 2G mem):
> >
> > real    0m42.99s
> > user    0m29.85s
> > sys     0m6.47s
> >
> > We then reconfigured the virtual server to use a single core and the results
> > were almost identical to the 4 core test.
> >
> > Any insights as to what our problem might be would be greatly appreciated.
> Try using kernbench for testing.
I'll do that and post my results.  Pointers as to where I can get it?

> Also, what version of xen, guest kernel etc.?
Red Hat advance server 5.2
kernel-xen-devel-2.6.18-92.el5
xen-3.0.3-64.el5_2.1

--
Until later, Geoffrey

Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety.
 - Benjamin Franklin

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