Overlapping of Communication and Computation in nb3dfft for 3D Fast Fourier Transformations

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• 关键词：3D ; FFT ; Overlapping communication and computation ; Turbulence ; Pseudo ; spectral ; Numerical simulation ; HPC
• 刊名：Lecture Notes in Computer Science
• 出版年：2017
• 出版时间：2017
• 年：2017
• 卷：10164
• 期：1
• 页码：151-159
• 丛书名：High-Performance Scientific Computing
• ISBN：978-3-319-53862-4
• 卷排序：10164

文摘

For efficiency and accuracy of Direct Numerical Simulations (DNS) of turbulent flows pseudo-spectral methods can be employed, where the governing equations are solved partly in Fourier space. The inhouse-developed 3d-FFT library nb3dfft is optimized to the special needs of pseudo-spectral DNS, particularly for the scientific code psOpen, used by the Institute for Combustion Technology at RWTH Aachen University. In this paper we discuss the method of overlapping communication and computation of multiple FFTs at the same time.