[Beowulf] Woodcrest Memory bandwidth

Joe Landman landman at scalableinformatics.com
Tue Aug 8 22:48:56 EDT 2006


Have done this.  Get about 6.6GB/s per CPU, and under 10GB/s for two

Not sure if I understand the multiprocessor results yet, working on some 
other stuff.

FWIW, I get about 5 GB/s on an Opteron 275.

Joe

Bill Broadley wrote:
> I have a theory that the 533 MHz FB dimms have a severe performance
> penalty on 1333 MHz FSB.
> 
> Does anyone out there have a 1333 MHz FSB dual woodcrest (pick your
> vendor) with 4 667 MHz FB-dimms?  A 1066 MHz FSB with 4 533 MHz dimms
> would also be interesting.
> 
> Could you run: http://www.cs.virginia.edu/stream/ ?
> 
> Ideally compiled with a F90 or C compiler (Intel, Pathscale, and I imagine
> many others) that support OpenMP so you can run 4 threads (one per core)
> in parallel.
> 

-- 
Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics LLC,
email: landman at scalableinformatics.com
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