Using Hierarchical Parallelism to Accelerate the Solution of Many Small Partial Differential Equations

05/05/2023

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by   Jacob Merson, et al.

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This paper presents efforts to improve the hierarchical parallelism of a two scale simulation code. Two methods to improve the GPU parallel performance were developed and compared. The first used the NVIDIA Multi-Process Service and the second moved the entire sub-problem loop into a single kernel using Kokkos hierarchical parallelism and a PackedView data structure. Both approaches improved parallel performance with the second method providing the greatest improvements.