24.77 Pflops on a Gravitational Tree-Code to Simulate the Milky Way Galaxy with 18600 GPUs
24.77 Pflops on a Gravitational Tree-Code to Simulate the Milky Way Galaxy with 18600 GPUs
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使用 18600 个 GPU 模拟银河系的引力树代码需要 24.77 Pflops
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S. Zwart
中科院分区：
文献类型：
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作者：
J. Bédorf;E. Gaburov;M. Fujii;Keigo Nitadori;T. Ishiyama;S. Zwart
我们首次模拟了银河系的长期演变，使用我们的N体重力树代码盆景在瑞士PIZ daint Supercuter上使用510亿个颗粒。在此，我们描述了科学动机和数值算法。银河系模型模拟了60亿年，在此期间，条形结构和螺旋臂完全形成。通过使用1000倍的粒子，这可以改善以前的模拟，并提供大量可以直接与观测值进行比较的新数据。我们还报告了瑞士Piz Daint和美国Ornl Titan的可伸缩性。在PIZ上，盆景的平行效率超过95％。使用18600 GPU在Titan上使用2420亿个粒子银河系模型实现了最高的性能，从而达到了持续的GPU和33.49 Pflops和24.77 Pflops的应用程序性能。
We have simulated, for the first time, the long term evolution of the Milky Way Galaxy using 51 billion particles on the Swiss Piz Daint supercomputer with our N-body gravitational tree-code Bonsai. Herein, we describe the scientific motivation and numerical algorithms. The Milky Way model was simulated for 6 billion years, during which the bar structure and spiral arms were fully formed. This improves upon previous simulations by using 1000 times more particles, and provides a wealth of new data that can be directly compared with observations. We also report the scalability on both the Swiss Piz Daint and the US ORNL Titan. On Piz Daint the parallel efficiency of Bonsai was above 95%. The highest performance was achieved with a 242 billion particle Milky Way model using 18600 GPUs on Titan, thereby reaching a sustained GPU and application performance of 33.49 Pflops and 24.77 Pflops respectively.