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Automatic load balancing in parallel direct simulation methods

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1 Author(s)
P. Cremonesi ; Dipartimento di Elettronica e Inf., Politecnico di Milano, Italy

Performing Direct Simulation Monte Carlo (DSMC) calculations on parallel processors may result in a strongly unbalanced distribution of work. This situation affects the performances leading to very low speedups. A method that makes use of adaptive domain decomposition to dynamically distribute the computational work load is presented. The method had been implemented on a Transputer System with up to 8 processors (20 MHz Inmos T800), using the FORTRAN version of Parasoft Express Library for parallel computers. The problems studied were hypersonic flows of a chemically reacting gas in a two-dimensional domain. The adaptive decomposition method worked well in uniformly distributing the computational work over an arbitrary number of processors and reduced the average execution time by over 45% in certain cases

Published in:

Massively Parallel Computing Systems, 1994., Proceedings of the First International Conference on

Date of Conference:

2-6 May 1994