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



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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