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Performance aspects of collocated and staggered grids for particle-in-cell plasma simulation

S. Bastrakov ; I. Surmin ; E. Efimenko ; Arkady Gonoskov (Institutionen för fysik, Teoretisk fysik (Chalmers)) ; I. Meyerov
Lecture Notes in Computer Science - 14th International Conference on Parallel Computing Technologies, PaCT 2017, Nizhny Novgorod, Russian Federation, 4-8 September 2017 (0302-9743). Vol. 10421 (2017), p. 94-100.
[Konferensbidrag, refereegranskat]

We present a computational comparison of collocated and staggered uniform grids for particle-in-cell plasma simulation. Both types of grids are widely used, and numerical properties of the corresponding solvers are well-studied. However, for large-scale simulations performance is also an important factor, which is the focus of this paper. We start with a baseline implementation, apply widely-used techniques for performance optimization and measure their efficacy for both grids on a high-end Xeon CPU and a second-generation Xeon Phi processor. For the optimized version the collocated grid outperforms the staggered one by about 1.5x on both Xeon and Xeon Phi. The speedup on the Xeon Phi processor compared to Xeon is about 1.9x.

Nyckelord: Particle-in-cell, Performance optimization, Plasma simulation, SIMD, Xeon Phi

Denna post skapades 2017-09-29.
CPL Pubid: 252136


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