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A 1.8 trillion degrees-of-freedom, 1.24 petaflops global seismic wave simulation on the K computer
https://nied-repo.bosai.go.jp/records/4979
https://nied-repo.bosai.go.jp/records/4979f2b983ba-030e-4c67-a872-5dfd52c0cd69
| Item type | researchmap(1) | |||||||||||||||||
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| 公開日 | 2023-03-30 | |||||||||||||||||
| タイトル | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| タイトル | A 1.8 trillion degrees-of-freedom, 1.24 petaflops global seismic wave simulation on the K computer | |||||||||||||||||
| 言語 | ||||||||||||||||||
| 言語 | eng | |||||||||||||||||
| 著者 |
Seiji Tsuboi
× Seiji Tsuboi
× Kazuto Ando
× Takayuki Miyoshi
× Daniel Peter
× Dimitri Komatitsch
× Jeroen Tromp
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| 抄録 | ||||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||||
| 内容記述 | We present high-performance simulations of global seismic wave propagation with an unprecedented accuracy of 1.2?s seismic period for a realistic three-dimensional Earth model using the spectral element method on the K computer. Our seismic simulations use a total of 665.2 billion grid points and resolve 1.8 trillion degrees of freedom. To realize these large-scale computations, we optimize a widely used community software code to efficiently address all hardware parallelization, especially thread-level parallelization to solve the bottleneck of memory usage for coarse-grained parallelization. The new code exhibits excellent strong scaling for the time stepping loop, that is, parallel efficiency on 82,134 nodes relative to 36,504 nodes is 99.54%. Sustained performance of these computations on the K computer is 1.24 petaflops, which is 11.84% of its peak performance. The obtained seismograms with an accuracy of 1.2?s for the entire globe should help us to better understand rupture mechanisms of devastating earthquakes. | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 書誌情報 |
en : The International Journal of High Performance Computing Applications 巻 30, 号 4, p. 411-422, 発行日 2016-11 |
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| 出版者 | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 出版者 | SAGE Publications | |||||||||||||||||
| ISSN | ||||||||||||||||||
| 収録物識別子タイプ | EISSN | |||||||||||||||||
| 収録物識別子 | 1741-2846 | |||||||||||||||||
| DOI | ||||||||||||||||||
| 関連識別子 | 10.1177/1094342016632596 | |||||||||||||||||
