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arXiv · 2208.05429

Designing a 3D Parallel Memory-Aware Lattice Boltzmann Algorithm on Manycore Systems

Yuankun Fu·Fengguang Song
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Abstract

Lattice Boltzmann method (LBM) is a promising approach to solving Computational Fluid Dynamics (CFD) problems, however, its nature of memory-boundness limits nearly all LBM algorithms' performance on modern computer architectures. This paper introduces novel sequential and parallel 3D memory-aware LBM algorithms to optimize its memory access performance. The introduced new algorithms combine the features of single-copy distribution, single sweep, swap algorithm, prism traversal, and merging two temporal time steps. We also design a parallel methodology to guarantee thread safety and reduce synchronizations in the parallel LBM algorithm. At last, we evaluate their performances on three high-end manycore systems and demonstrate that our new 3D memory-aware LBM algorithms outperform the state-of-the-art Palabos software (which realizes the Fuse Swap Prism LBM solver) by up to 89%.

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Yuankun Fu, Fengguang Song. 2022-08-10. Designing a 3D Parallel Memory-Aware Lattice Boltzmann Algorithm on Manycore Systems. https://doi.org/10.1007/978-3-030-85665-6_32

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