Abstract: An FFT parallel solver is designed and implemented in JASMIN infrastructure to solve problems,such as computation scale restriction,great change of data structure,different communications among data structures,and arguments' diversity of FFTW functions as using FFTW directly.The solver encapsulates several distributed storages of data,different communications and 1D FFT computations with FFTW.It provides standard functions to users.With this solver FFT parallel computing is realized conveniently.It was used in numerical simulations of laser filament.Scalability was demonstrated with a parallel efficiency above 80% on 2048 processors.

Key words: FFT, parallel solver, JASMIN