The Climate Model ECHAM5 on NEC SX-8
Climate simulation codes like ECHAM5 consider the dynamics of the Earth system over a long period of time. The huge number of time steps to be propagated restricts the spatial discretization to comparably coarse grid resolutions. This requires scalable parallelizations based on the lowly resolved spatial domain which can cope with the computational effort in the non-parallelizable time domain. The paper on hand gives an overview of the optimization of ECHAM5 on the NEC SX-8 with respect to performance and scalability. Several single CPU and scalability optimization are described. The outcome of the optimizations is demonstrated in detailed performance measurements.
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- 1.Special section: Climate models at the Max Planck Institute for Meteorology (MPI-M). Journal of Climate 19, 3769–3987 (2006) Google Scholar
- 2.Kornblueh, L.: ECHAM5 - an atmospheric climate model and the extension to a coupled model. In: M. Resch, T. Bönisch, S. Tiyyagura, T. Furui, Y. Seo, W. Bez (eds.) High Performance Computing on Vector Systems. Proceedings of the High Performance Computing Center Stuttgart, March 2006, pp. 171–181. Springer, Berlin Heidelberg, Germany (2007) CrossRefGoogle Scholar
- 3.NEC Corporation: SUPER-UX Performance Tuning Guide. Revision 1.2 (2007) Google Scholar
- 4.NEC Corporation: SUPER-UX Shared Memory Parallelization Guide. Revision 1.2 (2007) Google Scholar