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Pillay: An evaluation of architectural platforms for parallel NavierStokes computations

By D. N. Jayasimha, M. E. Hayder, S. K. Pillay, D. N. Jayasimha, M. E. Hayder and S. If. Pillay

Abstract We study the computational, communication, and scalability characteristics of a Compu-tational Fluid Dynamics application, which solves the time accurate flow field of a jet using the compressible Navier-Stokes equations, on a variety of parallel architecture platforms. The platforms chosen for this study are a cluster of workstations (the LACE experimental testbed at NASA Lewis), a shared memory muItiprocessor (the Cray YMP), and distributed memory multiprocessors with different topologies-- the IBM SP and the Cray T3D. We investigate the impact of various networks connecting the cluster of workstations on the per-formance of the application and the overheads induced by popular message passing libraries used for parallelization. The work also highlights the importance of matching the memory bandwidth to the processor speed for good single processor performance. By studying the performance of an application on a variety of architectures, we are able to point out the strengths and weaknesses of each of the example computing platforms

Year: 1996
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