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DOE OSTI · 2574453

kokkos-fft: A shared-memory FFT for the Kokkos ecosystem

Asahi, Yuuichi [Université Paris-Saclay, Gif-sur-Yvette (France)] (ORCID:0000000299971274)·Padioleau, Thomas [Université Paris-Saclay, Gif-sur-Yvette (France)] (ORCID:0000000154960013)·Zehner, Paul [Université Paris-Saclay, Gif-sur-Yvette (France)] (ORCID:0000000248110079)·Bigot, Julien [Université Paris-Saclay, Gif-sur-Yvette (France)] (ORCID:0000000200154304)·Lebrun-Grandie, Damien [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000319527219)
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Abstract

kokkos-fft provides a unified, performance-portable interface for Fast Fourier Transforms (FFTs) within the Kokkos ecosystem (C. Trott et al., 2021). It seamlessly integrates with leading local FFT libraries including FFTW, cuFFT, rocFFT, and oneMKL. Designed for simplicity and efficiency, kokkos-fft offers a user experience akin to numpy.fft for in-place and out-of-place transforms, while leveraging the raw speed of vendor-optimized libraries. A demonstration solving 2D Hasegawa-Wakatani turbulence with the Fourier spectral method illustrates how kokkos-fft can deliver significant speedups over Python-based alternatives without drastically increasing code complexity, empowering researchers to perform high-performance FFTs simply and effectively.

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97 MATHEMATICS AND COMPUTINGFFTHigh performance computingPerformance portability

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BibTeXRIS

Asahi, Yuuichi [Université Paris-Saclay, Gif-sur-Yvette (France)] (ORCID:0000000299971274), Padioleau, Thomas [Université Paris-Saclay, Gif-sur-Yvette (France)] (ORCID:0000000154960013), Zehner, Paul [Université Paris-Saclay, Gif-sur-Yvette (France)] (ORCID:0000000248110079), Bigot, Julien [Université Paris-Saclay, Gif-sur-Yvette (France)] (ORCID:0000000200154304), Lebrun-Grandie, Damien [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000319527219). 2025-07-30. kokkos-fft: A shared-memory FFT for the Kokkos ecosystem. https://doi.org/10.21105/joss.08391

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