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Communication Efficiency of Parallel 3D FFTs

by A. Adelmann and A. Bonelli and W. P. Petersen and C. W. Überhuber

(Report number 2004-04)

Abstract
This paper describes the empirical investigation of the communication to computation time ratio of three-dimensional parallel FFTs. Different problem sizes, number of processes, and various communication networks are considered. Results are given on algorithms developed at the Vienna University of Technology, the Paul Scherrer Institut, and ETH Zurich. All transposition algorithms of this study were portably implemented in MPI. Thus, the communication performance on specific networks reflects the efficiency of these MPI implementations.

Keywords:

@Techreport{ABPÜ04_331,
  author = {A. Adelmann and A. Bonelli and W. P. Petersen and C. W. Überhuber},
  title = {Communication Efficiency of Parallel 3D FFTs},
  institution = {Seminar for Applied Mathematics, ETH Z{\"u}rich},
  number = {2004-04},
  address = {Switzerland},
  url = {https://www.sam.math.ethz.ch/sam_reports/reports_final/reports2004/2004-04.pdf },
  year = {2004}
}

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