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Published in:
2020 | OriginalPaper | Chapter
Accelerating the Performance of Modal Aerosol Module of E3SM Using OpenACC
Authors : Hongzhang Shan, Zhengji Zhao, Marcus Wagner
Published in: Accelerator Programming Using Directives
Publisher: Springer International Publishing
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Abstract
Using GPUs to accelerate the performance of HPC applications has recently gained great momentum. Energy Exascale Earth System Model (E3SM) is a state-of-the-science earth system model development and simulation project and has gained national recognition. It has a large code base with over a million lines of code. How to make effective use of GPUs, however, remains a challenge. In this paper, we use the modal aerosol module (MAM) of E3SM as a driving example to investigate how to effectively offload computational tasks to GPUs using the OpenACC directives. In particular, we are interested in the performance advantage of using GPUs and in understanding performance-limiting factors from both application characteristics and the GPU or OpenACC.