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Accelerating high-order continuum kinetic plasma simulations using multiple GPUs by Ho, Andrew; Vogman, Genia is a scholarly article available to read on EtoBox.

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Kinetic plasma simulations solve the Vlasov-Poisson or Vlasov-Maxwell equations to evolve scalar-variable distribution functions in position-velocity phase space and vector-variable electromagnetic fields in physical space. The computational cost of evolving high-dimensional variables often limits the utility of continuum kinetic simulations and presents a challenge when it comes to accurately simulating real-world physical phenomena. To address this challenge, we developed techniques that accelerate and minimize the computational work required for a scalable Vlasov-Poisson solver. We present theoretical hardware compute and communication bounds required for solving a fourth-order finite-volume Vlasov-Poisson system. These bounds are then used to inform and evaluate the design of performance portable algorithms for a multiple graphics processing unit (GPU) accelerated version of the Vlasov-Poisson solver VCK-CPU. We demonstrate that the multi-GPU Vlasov solver implementation VCK-GPU simultaneously minimizes required inter-process data transfer while also being bounded by the machine network performance limits, leaving minimal room for theoretical performance improvements. This resu

Author

Ho, Andrew; Vogman, Genia

Published

2024

Language

EN