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arXiv 2007.05218astro-ph.IMastro-ph.HE
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为Exascale准备核天体物理学

Preparing Nuclear Astrophysics for Exascale

Max P. Katz, Ann Almgren, Maria Barrios Sazo, Kiran Eiden, Kevin Gott, Alice Harpole, Jean M. Sexton, Don E. Willcox, Weiqun Zhang, Michael Zingale

摘要:

超新星等天体物理爆炸是迷人的事件,需要复杂的算法和大量的计算能力来建模。Castro和MAESTROeX是核天体物理学代码,模拟超新星和X射线爆发背景下的热核聚变。使用高分辨率模拟来检查这些核燃烧过程对于理解这些天体物理爆炸如何发生至关重要。在本文中,我们描述了这些代码的变化,将它们从标准的MPI + OpenMP代码的目标是基于千万亿次CPU的系统转换成一种形式兼容的pre-exascale系统现在在线和exascale系统即将到来。然后,我们讨论了什么样的新科学可以在像Summit和Perlmutter这样的系统上运行,而这些系统在上一代超级计算机上是无法实现的。

英文摘要:

Astrophysical explosions such as supernovae are fascinating events that require sophisticated algorithms and substantial computational power to model. Castro and MAESTROeX are nuclear astrophysics codes that simulate thermonuclear fusion in the context of supernovae and X-ray bursts. Examining these nuclear burning processes using high resolution simulations is critical for understanding how these astrophysical explosions occur. In this paper we describe the changes that have been made to these codes to transform them from standard MPI + OpenMP codes targeted at petascale CPU-based systems into a form compatible with the pre-exascale systems now online and the exascale systems coming soon. We then discuss what new science is possible to run on systems such as Summit and Perlmutter that could not have been achieved on the previous generation of supercomputers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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