RE: High Performance Linpack
-----Original Message-----
From: Jo Shields [mailto:jo.shields@oerc.ox.ac.uk]
Sent: Wednesday, March 21, 2007 8:41 AM
To: Steffen Grunewald
Cc: debian-amd64@lists.debian.org
Subject: Re: High Performance Linpack
On Wed, 2007-03-21 at 13:59 +0100, Steffen Grunewald wrote:
> On Wed, Mar 21, 2007 at 12:59:36PM +0100, Steffen Grunewald wrote:
> > Hi,
> >
> > I'm looking for a recent version of HighPerformanceLinpack (you
> > know, the one that is used to build the top-500 list) and
> > instructions how to compile and run it under Debian/Etch on amd64
> > architecture. I have (C)BLAS and LAM-MPI already installed, but keep
> > getting compile errors (from deep inside) :-(
>
> Replying to myself:
>
> I had to install libmpich1.0-dev (and BLAS/ATLAS dev packages), and
> heavily twaek the Make.arch file, to get a xhpl binary. But I can only
> run it on MPICH, not LAM-MPI. Suggestions?
Is there a specific reason for using LAM?
Performance on a cluster using Gigabit Ethernet and GNU compilers will be
diabolical - and I don't think any of the high performance interconnects use
LAM as a base
--
______________________________
/ Jo Shields <jms@osc.ox.ac.uk> \
| Systems Manager, |
\ Oxford Supercomputing Centre /
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\ ,__,
\ (oo)___
(__) )\
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--
I second the suggestion for not using LAM. LAM is very easy to work with,
but the performance is not great. We have tried it, and we are using MPICH
now, and that process involved a lot of work to move away from LAM. It was
worth it. LAM is great for proof of concept things, but you would be well
served to move away from it for HPC work. I am not trying to be a jerk. I
wasted almost a year trying to get LAM to run like a scalded cat and would
urge you to consider other options if you need speed. LAM isn't the way to
go.
I was about to do the exact same thing as you, by the way, so when I get it
to work, I will post how I did it (unless you have already done so). I will
be doing that this next weekend, hopefully.
Brendan Todd Corkery
brendan.corkery at weatherford.com
UNIX/HPC
Weatherford Drilling Services
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