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

["Grant McWilliams" <grantmasterflash@xxxxxxxxx>]

On Thu, Sep 25, 2008 at 8:22 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.

--
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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Wouldn't you have to do make -j 4 to use 4 cores?  It looks like on the laptop you're using one 2.5 Ghz core and on the Xen VM you're using one 2.66 Ghz core.

--
Grant McWilliams

Some people, when confronted with a problem, think "I know, I'll use Windows."
Now they have two problems.

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