High performance parallel FFT on distributed memory parallel computers

  • Naohiko Shimizu
  • Takehiko Watanabe
VI Application
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1336)


In this paper, a high performance parallelizing method of FFT is presented. Well known four or six step parallel algorithm with standard index map is not suitable for highly parallel computers, because it requires all-to-all communications between two phases of sub-FFTs which can not be overlap the computation of the each sub-FFT over the communication. We introduce another index map and algorithm which is intended to overcome the problem, and our results shows that our method out-perform the four step method in the 26 case out of 32 experiments. The results was obtained with up to 128 processors NEC Cenju-3 using the mini-MPI library.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Naohiko Shimizu
    • 1
  • Takehiko Watanabe
    • 2
  1. 1.School of EngineeringTokai UniversityKanagawaJapan
  2. 2.NTT corp.Japan

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