Publication: Evaluation of HPC architectures for BRAMS numerical weather model

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Title	Evaluation of HPC architectures for BRAMS numerical weather model
Authors/Editors*	E. S. Almeida, M. A. Bauer, A. L. Fazenda
Where published*	International Conference on Parallel and Distributed Processing Techniques and Applications
How published*	Proceedings
Year*	2011
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Pages
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Keywords	Performance, BRAMS, Numerical Weather Prediction (NWP) model, High Performance Computing (HPC), parallel processing, multi-core architecture
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Abstract	This paper investigates the performance of a weather forecasting application (Brazilian Regional Atmospheric Modeling System - BRAMS) on a number of selected HPC clusters in order to understand the impact of different architectural configurations on its performance and scalability. We simulated atmosphere conditions over South America for 24 hours ahead with BRAMS, using 100 cores as a starting point (100 cores step). An extra set of executions took place from 10 to 100 cores (10 cores step) to identify more details about BRAMS performance. Results reveal differences in BRAMS performance and its relationship with interconnection (technology and topology). In conclusion, interconnection can limit application performance even with code improvement.