The Simple Cloud-Resolving E3SM Atmosphere Model Running on the Frontier Exascale System

Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis Pub Date : 2023-11-12 DOI:10.1145/3581784.3627044

Mark Taylor, Peter M. Caldwell, Luca Bertagna, Conrad Clevenger, Aaron Donahue, J. Foucar, O. Guba, Benjamin Hillman, Noel Keen, Jayesh Krishna, Matthew Norman, S. Sreepathi, Christopher Terai, James B. White, A. Salinger, Renata B McCoy, L. R. Leung, David C. Bader, Danqing Wu

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Abstract

We present an efficient and performance portable implementation of the Simple Cloud Resolving E3SM Atmosphere Model (SCREAM). SCREAM is a full featured atmospheric global circulation model with a nonhydrostatic dynamical core and state-of-the-art parameterizations for microphysics, moist turbulence and radiation. It has been written from scratch in C++ with the Kokkos library used to abstract the on-node execution model for both CPUs and GPUs. SCREAM is one of only a few global atmosphere models to be ported to GPUs. As far as we know, SCREAM is the first such model to run on both AMD GPUs and NVIDIA GPUs, as well as the first to run on nearly an entire Exascale system (Frontier). On Frontier, we obtained a record setting performance of 1.26 simulated years per day for a realistic cloud resolving simulation.

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在前沿超大规模系统上运行的简单云解析 E3SM 大气模型

我们介绍了简单云解析 E3SM 大气模型（SCREAM）的高效和性能可移植实施。SCREAM 是一个功能齐全的大气全球环流模型，具有非静水动力学核心和最先进的微物理、湿湍流和辐射参数。该模型由 C++ 从头开始编写，使用 Kokkos 库为 CPU 和 GPU 抽象节点执行模型。SCREAM 是仅有的几个被移植到 GPU 上的全球大气模型之一。据我们所知，SCREAM 是第一个同时在 AMD GPU 和 NVIDIA GPU 上运行的此类模型，也是第一个在几乎整个 Exascale 系统（Frontier）上运行的此类模型。在 Frontier 上，我们获得了每天 1.26 个模拟年的性能，创下了现实云解析模拟的记录。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis

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