The International Conference for High Performance Computing, Networking, Storage, and Analysis
The International Conference for High Performance Computing, Networking, Storage, and Analysis
Authors: Wubing Wan and Lin Gan (Tsinghua University, China; National Supercomputing Center in Wuxi, China); Wenqiang Wang (Southern University of Science and Technology, China); Zekun Yin and Haodong Tian (Shandong University, China); Zhenguo Zhang (Southern University of Science and Technology, China); Yinuo Wang (Tsinghua University, China); Mengyuan Hua and Xiaohui Liu (Shandong University, China); Shengye Xiang and Zeyu Song (Tsinghua University, China); Zhongqiu He and Zijia Wang (Southern University of Science and Technology, China); Ping Gao (Tsinghua University, China; National Supercomputing Center in Wuxi, China); Yaojian Chen (Tsinghua University, China); Xiaohui Duan (Shandong University, China); Xin Liu (National Supercomputing Center in Wuxi); Wei Zhang (Southern University of Science and Technology, China); Haohuan Fu and Wei Xue (Tsinghua University, China); Weiguo Liu (Shandong University, China); Guangwen Yang (Tsinghua University, China); and Xiaofei Chen (Southern University of Science and Technology, China)
Abstract: A high-scalable and fully optimized earthquake model is presented based on the latest Sunway supercomputer. Contributions include:
1) the curvilinear grid finite-difference method (CGFDM) and flexible model applying perfectly matched layer (PML) and enabling more accurate and realistic terrain descriptions;
2) a hybrid and non-uniform domain decomposition scheme that efficiently maps the model across different levels of the computing system; and
3) sophisticated optimizations that largely alleviate or even eliminate bottlenecks in memory, communication, etc., obtaining a speedup of over 140x.
Combining all innovations, the design fully exploits the hardware potential of all aspects and enables us to perform the largest CGFDM-based earthquake simulation ever reported (69.7 PFlops using over 39 million cores).
Based on our design, the Turkey earthquakes (February 6, 2023), and the Ridgecrest earthquake (July 4, 2019), are successfully simulated with a maximum resolution of 12-m. Precise hazard evaluations for the hazardous reduction of earthquake-stricken areas are also conducted.
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