Porting NAHUJ to CUDA

Evghenii Gaburov
SURFsara, Science Park 140, 1098XG Amsterdam, the Netherlands
PRACE, 2014


   title={Porting NAHUJ to CUDA},

   author={Gaburov, Evghenii},



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This white-paper reports on an enabling effort that involves porting a legacy 2D fluid dynamics Fortran code to NVIDIA GPUs. Given the complexity of both code and underlying (custom) numerical method, the natural choice was to use NVIDIA CUDA C to achieve the best possible performance. We achieved over 4.5x speed-up on a single K20 compared to the original code executed on a dual-socket E5-2687W.
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