On Sun, Jul 27, 2008 at 09:58:38PM -0400, Ivan Oleynik wrote:
> Sender: [EMAIL PROTECTED]
>
> Joshua,
> Thanks for your response.
>
> I may be wrong but Barcelona at 2.3GHz is being offered at the same
> price as
> Harpertown at 2.8GHz.
>
> Yes, both opteron 2356 and Xeon E5440 are comparable in pricing (~
> $700), but it is 0.5 GHz difference!
> I am going to run some tests, but our previous experience with 2.0GHz
> Barcelona was not very encouraging.
Run some memory bandwidth and cache interaction tests.
A 0.5Ghz clock advantage with a slow memory interface may
be a net loss.
It no longer is 'sane' to count clocks per instruction or chart pipeline
interactions by hand on paper so yes test with as many codes you
you have handy (and as many compilers).
--
T o m M i t c h e l l
Looking for a place to hang my hat.
_______________________________________________
Beowulf mailing list, Beowulf@beowulf.org
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
