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A Task Programming Implementation for the Particle in Cell Code Smilei

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arxiv 2204.12837 v1 pith:2FOE56L5 submitted 2022-04-27 cs.DC physics.comp-phphysics.plasm-ph

A Task Programming Implementation for the Particle in Cell Code Smilei

classification cs.DC physics.comp-phphysics.plasm-ph
keywords codeoperationscellformulationimplementationopenmpparticleprogramming
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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An implementation of the electromagnetic Particle in Cell loop in the code Smilei using task programming is presented. Through OpenMP, the macro-particles operations are formulated in terms of tasks. This formulation allows asynchronous execution respecting the data dependencies of the macro-particle operations, the most time-consuming part of the code in simulations of interest for plasma physics. Through some benchmarks it is shown that this formulation can help mitigating the load imbalance of these operations at the OpenMP thread level. The improvements in strong scaling for load-imbalanced physical cases are discussed.

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