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Regensburg 2010 – scientific programme

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MA: Fachverband Magnetismus

MA 33: Poster II

MA 33.31: Poster

Friday, March 26, 2010, 11:00–14:00, Poster B1

Massively parallel micromagnetic FEM calculations with Graphical Processing Units — •Attila Kákay1, Elmar Westphal2, and Riccardo Hertel11Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, Elektronische Eigenschaften — 2Forschungszentrum Jülich GmbH, IFF-Netzwerke und Numerik

We have adapted our Finite Element Micromagnetic simulation software to the massively parallel architecture of Graphical Processing Units (GPUs) by employing NVIDIA’s “Compute Unified Device Architecture” (CUDA)[1] software platform for high-performance computing. The performance of the code is demonstrated on the example of µMAG standard problem #4, where the computation time of a single GPU is compared with an OpenMP-parallelized version of our code using eight CPUs. In this comparison, the adaption of both the magnetostatic field calculation and the time integration of the Landau-Lifshitz-Gilbert equation to the GPU architecture can lead to a speedup factor of up to ten. The performance of the GPU code increases with increasing number of discretization points. The computation time required for high-resolution micromagnetic simulations of the magnetization dynamics in large magnetic samples can thus effectively be reduced by employing GPUs.

[1] CUDA Programming Guide, http://www.nvidia.com/

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