Final results from the tuning of the NMS/spl I.bar/6b weather code

The nonhydrostatic model simulation (NMS) /spl I.bar/6b weather code is commonly used by weather forecasters at television stations across the country. It is also of interest to the US Army due to its superior ability to predict weather in mountainous terrain. It was developed by Dr. Greg Tripoli of the University of Wisconsin (1992). Currently this code exists only as a shared memory application parallelized using OpenMP. Attempts to parallelize it for distributed memory systems using MPI proved to be beyond the scope of the project that the author was involved in. This paper discusses efforts to improve the performance of the code at both the processor level and at the level of parallel performance.