Issues and Techniques for Performance Optimization at Scale: Recent Progress with the Community Atmosphere Model

Patrick H. Worley (ORNL)
Arthur A. Mirin (LLNL)


Recent experiences and results in enhancing computer performance
of the Community Atmosphere Model (CAM) on the Cray XT4 and XT5
are discussed. Common performance scalability limiters are described, followed by techniques for addressing these scalability problems in CAM. Finally,
the efficacy of these techniques is demonstrated.

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