Optimum number of CPU-s to be used?

General scientific issues regarding ROMS

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jayasankar
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Optimum number of CPU-s to be used?

#1 Post by jayasankar » Thu Dec 01, 2016 12:05 pm

Is there a thumb rule or an expression for the optimum number of CPUs to be used for a ROMS simulation?

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kate
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Re: Optimum number of CPU-s to be used?

#2 Post by kate » Thu Dec 01, 2016 7:22 pm

It depends on so many variables. It's best just to do some tests on your own problem using different numbers of cores. It mostly depends on your grid - too many cores and communications dominate the run time, too few and you don't fit into cache.

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