论文标题
为Exascale准备核天体物理学
Preparing Nuclear Astrophysics for Exascale
论文作者
论文摘要
诸如超新星之类的天体物理爆炸是引人入胜的事件，需要复杂的算法和实质性的计算能力才能建模。 Castro和Maestroex是核天体物理学代码，它们在超新星和X射线爆发的背景下模拟热核融合。使用高分辨率模拟检查这些核燃烧过程对于理解这些天体物理爆炸的发生至关重要。在本文中，我们将这些代码所做的更改从针对基于Petascale CPU的系统的标准MPI + OpenMP代码转换为与现在在线的前外壳系统和Exascale Systems兼容的形式。然后，我们讨论在上一代超级计算机上无法实现的系统上可以运行哪些新科学。
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.
