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OpenFFT

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OpenFFT is an open source parallel package for computing multi-dimensional Fast Fourier Transforms (3-D and 4-D FFTs) of both real and complex numbers of arbitrary input size. It originates from OpenMX (Open source package for Material eXplorer). OpenFFT adopts a communication-optimal domain decomposition method that is adaptive and capable of localizing data when transposing from one dimension to another for reducing the total volume of communication. It is written in C and MPI, with support for Fortran through the Fortran interface, and employs FFTW3 for computing 1-D FFTs.

Information
Last Update:2021/03/05

Official site

http://www.openmx-square.org/openfft/

License

GNU GPL version 3
AvailabilityLinux
Core DevelopersTruong Vinh Truong Duy (Nissan ARC), Taisuke Ozaki (the University of Tokyo)
Target substance/modelNumerical library
MethodologyMulti-dimensional fast Fourier transformation with minimum communication
ParallelizationMPI parallelization and MPI/OpenMP hybrid parallelization are supported. Massively parallel calculation on K-computer has been reported.
Document

Reference

OtherSales point It enables us to efficiently perform three- and four dimensional FFT in an arbitrary size. The library exhibits a good performance on the K-computer and PC clusters because of an optimized data structure minimizing the communication volume for a given number of MPI processes. It is easy to introduce the library for C and Fortran programs using the well developed interface. Related Application FFTW3 is required.
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