[Beowulf] General thoughts on Xeon 56xx versus E5 series?

holway at th.physik.uni-frankfurt.de holway at th.physik.uni-frankfurt.de
Thu Sep 13 07:09:12 PDT 2012

> Any general thought out there on Xeon 56xx versus E5 performance wise?

We were comparing the performance of an older AMD with a newer AMD a while
ago and found that the newer AMDs floating point performance was
significantly reduced.

It turned out that the kernel did not yet support AVX or FMA4 or some
other new fancy bit of register blah blah so it reverted to some
compatibility support for floating point operations. (I am not a kernel
dev :)

If your going to play with newer processors you have to make sure your
kernel supports all the functions of that CPU. Kernel development can be a
little way behind on mainstream releases.



> --
> Orion Poplawski
> Technical Manager                     303-415-9701 x222
> NWRA, Boulder Office                  FAX: 303-415-9702
> 3380 Mitchell Lane                       orion at nwra.com
> Boulder, CO 80301                   http://www.nwra.com
> _______________________________________________
> Beowulf mailing list, Beowulf at beowulf.org sponsored by Penguin Computing
> To change your subscription (digest mode or unsubscribe) visit
> http://www.beowulf.org/mailman/listinfo/beowulf

More information about the Beowulf mailing list