An integration of imprecise computation model and real-time voltage and frequency scaling

Keigo Mizotani, Yusuke Hatori, Yusuke Kumura, Masayoshi Takasu, Hiroyuki Chishiro, Nobuyuki Yamasaki

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

4 Citations (Scopus)

Abstract

As microprocessor performance grows, high throughput and the power management are becoming more important on embedded real-time systems. Real- Time Voltage and Frequency Scaling (RT-VFS) has been proposed to reduce the power consumption and ensure real-time constraints. An imprecise computation model adds an optional part to Liu and Layland's model to improve the quality of computations. This paper proposes the scheme to integrate an imprecise computation model and RT-VFS that can reduce the power consumption and improve the quality of computations within real-time constraints. Moreover, we implement this scheme on Dependable Responsive Multithreaded Processor (D-RMTP). D-RMTP is a prioritized simultaneous multithreaded processor for embedded real-time systems and D-RMTP system in a package supports RT-VFS. We implement the proposed scheme by use of D-RMTP original features to improve the quality of computations and reduce the energy consumption. Through experimental evaluation, we show that the proposed scheme satisfies both the lower energy consumption and higher performance on real environments. In our evaluation, the proposed scheme achieves a maximum of 135% improvement of the quality of computations per energy consumption.

Original languageEnglish
Title of host publicationProceedings of the 30th International Conference on Computers and Their Applications, CATA 2015
EditorsLes Miller
PublisherThe International Society for Computers and Their Applications (ISCA)
Pages63-70
Number of pages8
ISBN (Electronic)9781880843987
Publication statusPublished - 2015 Jan 1
Event30th International Conference on Computers and Their Applications, CATA 2015 - Honolulu, United States
Duration: 2015 Mar 92015 Mar 11

Publication series

NameProceedings of the 30th International Conference on Computers and Their Applications, CATA 2015

Other

Other30th International Conference on Computers and Their Applications, CATA 2015
CountryUnited States
CityHonolulu
Period15/3/915/3/11

Keywords

  • Embedded real-time system
  • Imprecise computation model
  • Power consumption
  • RT-VFS

ASJC Scopus subject areas

  • Computer Science Applications

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