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Nuclear fusion simulation code optimization on GPU clusters

GPUクラスタにおける核融合シミュレーションの最適化

藤田 典久*; 奴賀 秀男*; 朴 泰祐*; 井戸村 泰宏   

Fujita, Norihisa*; Nuga, Hideo*; Boku, Taisuke*; Idomura, Yasuhiro

A fusion plasma turbulence simulation code GT5D is optimized for GPU clusters with multiple GPUs on a node. We get 3.37 times faster performance in maximum in function level evaluation, and 2.03 times faster performance in total than the case of CPU-only execution on the HA-PACS GPU cluster. It includes 53% performance gain with overlapping MPI communications and GPU calculations.

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