Implementation of low communication frequency 3D FFT algorithm for ultra-large-scale micromagnetics simulation

We implement low communication frequency three-dimensional fast Fourier transform algorithms on micromagnetics simulator for calculations of a magnetostatic field which occupies a significant portion of large-scale micromagnetics simulation. This fast Fourier transform algorithm reduces the frequenc...

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Bibliographic Details
Published inComputer physics communications Vol. 207; pp. 217 - 220
Main Authors Tsukahara, Hiroshi, Iwano, Kaoru, Mitsumata, Chiharu, Ishikawa, Tadashi, Ono, Kanta
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2016
Subjects
All-to-all communication
Fast Fourier transform (FFT)
Hybrid parallelization
Large-scale simulation
Micromagnetics simulation
Hybrid parallelization
Fast Fourier transform (FFT)
Micromagnetics simulation
All-to-all communication
Large-scale simulation
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Summary:We implement low communication frequency three-dimensional fast Fourier transform algorithms on micromagnetics simulator for calculations of a magnetostatic field which occupies a significant portion of large-scale micromagnetics simulation. This fast Fourier transform algorithm reduces the frequency of all-to-all communications from six to two times. Simulation times with our simulator show high scalability in parallelization, even if we perform the micromagnetics simulation using 32768 physical computing cores. This low communication frequency fast Fourier transform algorithm enables world largest class micromagnetics simulations to be carried out with over one billion calculation cells.
ISSN:0010-4655
1879-2944
DOI:10.1016/j.cpc.2016.06.013