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IEEE Cluster 2013 Conference
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Wednesday, September 25 • 10:30am - 10:55am
Highly Optimized Full GPU-Acceleration of Non-hydrostatic Weather Model SCALE-LES

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SCALE-LES is a non-hydrostatic Weather Model developed at RIKEN, Japan. It is intended to be a global high-resolution model that would be scaled to exascale systems. This paper introduces the full GPU acceleration of all SCALE-LES modules. Moreover, the paper demonstrates the strategies to handle the unique challenges of accelerating SCALE-LES using GPU. The proposed acceleration is important for identifying the expectations and requirements of scaling SCALE-LES, and similar real world applications, into the exascale era. The GPU implementation includes the optimized GPU acceleration of SCALE-LES for a single GPU with both CUDA Fortran and OpenACC. It also includes scaling SCALE-LES for GPU-accelerated clusters. The results and analysis show how the optimization strategies affect the performance gain in SCALE-LES when moving from conventional CPU clusters towards GPU-powered clusters.


Wednesday September 25, 2013 10:30am - 10:55am
08th Floor - Circle City 08 (Hilton) 120 W. Market St, Indianapolis, IN