Three-precision algebraic multigrid on GPUs

Yu‐Hsiang Tsai

doi:10.1016/j.future.2023.07.024

2023-12-01

Yu‐Hsiang Tsai *

Natalie Beams

Hartwig Anzt

DOI：10.1016/j.future.2023.07.024

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摘要

En 中文

Recent research has demonstrated that using low precision inside some levels of an algebraic multigrid (AMG) solver can improve performance without negatively impacting the AMG quality. In this paper, we build upon previous research and implement an AMG that can use double, single, and half precision for the distinct multigrid levels. The implementation is platform-portable across GPU architectures from AMD, Intel, and NVIDIA. In an experimental analysis, we demonstrate that the use of half precision can be a viable option in multigrid. We evaluate the performance of different AMG configurations and demonstrate that mixed precision AMG can provide runtime savings compared to a double precision AMG.& COPY; 2023 Elsevier B.V. All rights reserved.

Keyword:

Algebraic multigrid

Mixed precision

Portability

GPUs

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期刊

Future Generation Computer Systems-The International Journal of eScience

IF:

6.1

论文数:

6.9K

被引数:

2.3W

机构

karlsruhe institute of technology

学者数:

2.0W

论文数: 1.5W

被引数: 23

Helmholtz Association

学者数:

13.2W

论文数: 10.7W

被引数: 145

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