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Run-TIme Optimizations

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Old   November 13, 2014, 00:58
Default Run-TIme Optimizations
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Shabir Mohamed
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What Optimizations can I do to reduce the runtime without effecting the correctness of the numerical values of a solved case?

Where are places I need to look into?
What should I be changing and consider making changes to?
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Old   November 14, 2014, 12:20
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How could we answer without any detail? Programming Language, application, etc.

At this level the only obvious answer is: use a profiler, it will tell you.
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Old   November 14, 2014, 12:35
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I am sorry. It is a case run in OpenFOAM which is written in C.

Software used: OpenFOAM CFD

Case: I am trying to solve the Shallow Water Equations using the OpenFOAM built in solver shallowWaterFoam.

Grid size: 70 x 40 square meters.

Iv started with a fine mesh with 20 cells per meter and have reduced it to 5 cells per meter for run-time reduction. Reducing it further may affect the accuracy of the output!!!

Current Hardware: Intel Core i7-3770 ---> 3.4 Ghz x 8

Graphics: Gallium 0.4 on NVE7 Cache: 3MB

Can you suggest some best choices for profiling packages?

Thanks
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