[Beowulf] El Reg: AMD reveals potent parallel processing breakthrough

Prentice Bisbal prentice.bisbal at rutgers.edu
Mon May 13 11:02:15 PDT 2013

On 05/11/2013 04:56 AM, Vincent Diepeveen wrote:
> The top500.org of today completely refutes your statement there.
> november 2012 list http://www.top500.org/list/2012/11/
> number 1: cray with gemini interconnect and K20x.
> That's not *easy* to program. Interconnect nor CUDA.
> number 2:
> BlueGene/Q
> also not 'easy' to program for with those dead slow latencies it has.


I agree with your point here, and you are making a good point,but you're 
off with regards to the Blue Genes.

All the Blue Genes use standard MPI programming, so any MPI-compliant 
program that you can run on your average Linux cluster, will compile and 
run just fine on any Blue Gene, and with good performance. Getting 
absolute maximum performance will take some additional code tweaking to 
use the Dual-Hummer FPUs on the /L and /P, or the QPX on the /Q, but 
that is no different than the Intel processors with the MMX, 
SSE[1,2,3...], AVX performance enhancements that have been added over 
the years.

And what do you mean by 'dead slow latencies'? The BG networking is 
pretty damn good.


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