[Beowulf] Slection from processor choices; Requesting Giudence

Geoff Jacobs gdjacobs at gmail.com
Fri Jun 16 08:49:11 PDT 2006


laytonjb at charter.net wrote:
<snip>
> - The network/MPI combination is fairly critical to good performance and to
> price/performance. I have done some benchmarks where the right MPI library
> on GigE produces faster results than a bad MPI library on Myrinet. Seems
> counter-intuitive, but I've seen it.
> - The MPI is pretty important to good performance particularly on GigE. One
> benchmark I did showed over a 2X in performance on LAM compared to
> MPICH1. I know MPICH1 is really old and we have a shiny new MPICH2, but
> you would be suprised how many people start with MPICH1 and how many
> people stick with it.
Do you have some anecdotal numbers for different MPI libraries over GigE?

> So, I'm not picking on Mark but I wanted to throw out some random observations
> I've made over the years. Not that I'm an expert but I've got a few CFD/cluster
> bruises and thought I would show people why I got them :)
> 
> Jeff
> _______________________________________________
> Beowulf mailing list, Beowulf at beowulf.org
> To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
> 


-- 
Geoffrey D. Jacobs

Go to the Chinese Restaurant,
Order the Special



More information about the Beowulf mailing list