The Effectiveness of Low-Precision Floating Arithmetic on Numerical Codes: A Case Study on Power Consumption

Ryuichi Sakamoto, Masaaki Kondo, Kohei Fujita, Tsuyoshi Ichimura, Kengo Nakajima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The low-precision floating point arithmetic that performs computation by reducing numerical accuracy with narrow bit-width is attracting since it can improve the performance of the numerical programs. Small memory footprint, faster computing speed, and energy saving are expected by performing calculation with low precision data. However, there have not been many studies on how low-precision arithmetics affects power and energy consumption of numerical codes. In this study, we investigate the power efficiency improvement by aggressively using low-precision arithmetics for HPC applications. In our evaluations, we analyze power characteristics of the Poisson's equation and the ground motion simulation programs with double precision and single precision floating point arithmetics. We confirm that energy efficiency improves by using low-precision arithmetics but it is heavily influenced by parameters such as data division and the number of OpenMP threads.

Original languageEnglish
Title of host publicationProceedings of International Conference on High Performance Computing in Asia-Pacific Region, HPC Asia 2020
PublisherAssociation for Computing Machinery
Pages199-206
Number of pages8
ISBN (Electronic)9781450372367
DOIs
Publication statusPublished - 2020 Jan 15
Externally publishedYes
Event2020 International Conference on High Performance Computing in Asia-Pacific Region, HPC Asia 2020 - Fukuoka, Japan
Duration: 2020 Jan 152020 Jan 17

Publication series

NameACM International Conference Proceeding Series

Conference

Conference2020 International Conference on High Performance Computing in Asia-Pacific Region, HPC Asia 2020
Country/TerritoryJapan
CityFukuoka
Period20/1/1520/1/17

Keywords

  • HPC Application
  • Low Precision Floating Arithmetic
  • Power Performance

ASJC Scopus subject areas

  • Software
  • Human-Computer Interaction
  • Computer Vision and Pattern Recognition
  • Computer Networks and Communications

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