Air pollution forecasting puts a high demand on the memory and the floating point performance of modern computers. For this kind of problems massively parallel computers are very promising, although the software tools and the I/O facilities on those machines are still under-developed. This report describes the work involved to port a 3D model, which was optimized for the parallel vector computer Cray C90, to a parallel distributed memory computer, namely the Cray T3D. After some introductory remarks about the model and the communication therein, examples are given to describe the performance of the T3D-machine on simple problems. Thereafter performance measurements are shown with kernels of the model using shared and explicit programming.

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CWI
Department of Numerical Mathematics [NM]
Numerieke Wiskunde

Keßler, C, Blom, J.G, & Verwer, J.G. (1995). Porting a 3D-model for the transport of reactive air pollutants to the parallel machine T3D. Department of Numerical Mathematics [NM]. CWI.