Novel Parallelization of Discontinuous Galerkin Method for Transient Electromagnetics Simulation Based on Sunway Supercomputers

Authors

  • Minxuan Li School of Electronic Engineering, Xidian University, Xi’an, 710071, China https://orcid.org/0000-0002-9556-5201
  • Qingkai Wu School of Electronic Engineering, Xidian University, Xi’an, 710071, China https://orcid.org/0000-0003-2564-3275
  • Zhongchao Lin School of Electronic Engineering, Xidian University, Xi’an, 710071, China
  • Yu Zhang School of Electronic Engineering, Xidian University, Xi’an, 710071, China
  • Xunwang Zhao School of Electronic Engineering, Xidian University, Xi’an, 710071, China

DOI:

https://doi.org/10.13052/2022.ACES.J.370706

Keywords:

discontinuous Galerkin method, electromagnetic analysis, memory access optimization, Sunway TaihuLight

Abstract

A novel parallelization of discontinuous Galerkin time-domain (DGTD) method hybrid with the local time step (LTS) method on Sunway supercomputers for electromagnetic simulation is proposed. The proposed method includes a minimum number of roundtrip (MNR) strategy for processor-level parallelism and a double buffer strategy based on the remote memory access (RMA) of the Sunway processor. The MNR strategy optimizes the communication topology between nodes by recursively establishing the minimum spanning tree and the double buffer strategy is designed to make communication overlapped computation when RMA transmission. Combining the two methods, the proposed method achieves an unprecedented massively parallelism of the DGTD method. Several examples of radiation and scattering are used as cases to study the accuracy and validity of the proposed method. The numerical results show that the proposed method can effectively support 16,000 nodes (1,040,000 cores) parallelism on the Sunway supercomputer, which enables the DGTD method to solve the transient electromagnetic field in a very short time.

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Author Biographies

Minxuan Li, School of Electronic Engineering, Xidian University, Xi’an, 710071, China

Minxuan Li was born in Changzhi, Shanxi, China, in 1994. He received the B.S. degree in electronic information engineering from Harbin Institute of Technology, Weihai, China in 2016. He is currently pursuing the Ph.D. degree with Xidian University, Xi’an, China. His current research interests include parallel computation and transient electromagneticanalysis.

Qingkai Wu, School of Electronic Engineering, Xidian University, Xi’an, 710071, China

Qingkai Wu was born in Yangzhou, Zhejiang, China, in 1997. He received the B.S. degree in electronic science and technology from Xidian University, Xi’an, China in 2020. He is currently pursuing the Ph.D. degree with Xidian University, Xi’an, China. His current research interests include transient electromagneticanalysis.

Zhongchao Lin, School of Electronic Engineering, Xidian University, Xi’an, 710071, China

Zhongchao Lin was born in Hubei, China, in 1988. He received the B.S. and Ph.D. degrees from Xidian University, Xi’an, China, in 2011 and 2016, respectively. He joined Xidian University, in 2016, as a Post Doctoral Fellow, where he was lately promoted as an Associate Professor. His research interests include large-scale computational electromagnetic, scattering, and radiation electromagnetic analysis.

Yu Zhang, School of Electronic Engineering, Xidian University, Xi’an, 710071, China

Yu Zhang received the B.S., M.S., and Ph.D. degrees from Xidian University, Xi’an, China, in 1999, 2002, and 2004, respectively. In 2004, he joined Xidian University as a Faculty Member. He was a Visiting Scholar and an Adjunct Professor with Syracuse University, from 2006 to 2009. As a Principal Investigator, he works on projects, including the Project of NSFC. He has authored four books Parallel Computation in Electromagnetics (Xidian University Press, 2006), Parallel Solution of Integral Equation-Based EM Problems in the Frequency Domain (Wiley IEEE, 2009), Time and Frequency Domain Solutions of EM Problems Using Integral Equations and a Hybrid Methodology (Wiley, 2010), and Higher Order Basis Based Integral Equation Solver (Wiley, 2012), as well as more than 100 journal articles and 40 conference papers.

Xunwang Zhao, School of Electronic Engineering, Xidian University, Xi’an, 710071, China

Xunwang Zhao was born in Shanxi, China, in 1983. He received the B.S. and Ph.D. degrees from Xidian University, Xi’an, China, in 2004 and 2008, respectively. He joined Xidian University, in 2008, as a Faculty Member, where he was lately promoted as a Full Professor. He was a Visiting Scholar with Syracuse University, Syracuse, NY, USA, from December 2008 to April 2009. As a Principal Inves tigator, he works on several projects, including the project of NSFC. His research interests include computational electromagnetic and electromagnetic scattering analysis.

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Published

2022-12-29

How to Cite

[1]
M. . Li, Q. . Wu, Z. . Lin, Y. . Zhang, and X. . Zhao, “Novel Parallelization of Discontinuous Galerkin Method for Transient Electromagnetics Simulation Based on Sunway Supercomputers”, ACES Journal, vol. 37, no. 07, pp. 795–804, Dec. 2022.

Issue

2022: Vol 37 Iss 7

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