Abstract
By considering electromagnetic scattering problems as examples, a study of the performance and scalability of the conjugate gradient squared (CGS) algorithm on two MIMD machines is presented. A modified CGS (MCGS) algorithm, where the synchronization overhead is effectively reduced by a factor of two, is proposed in this paper. This is achieved by changing the computation sequence in the CGS algorithm. Both experimental and theoretical analyses were performed to investigate the impact of this modification on the overall execution time.
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