Multi-objective optimization for application mapping and body bias control on a CGRA

Nguyen Anh Vu Doan, Yusuke Matsushita, Naoki Ando, Hayate Okuhara, Hideharu Amano

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

Body biasing can be used to control the leakage power and the performance of transistors by changing the threshold voltage after fabrication. Especially, a new process called Silicon-On-Thin BOX (SOTB) CMOS can control the balance of these two factors. When it is applied to a Coarse-Grained Reconfigurable Array (CGRA), the leakage power can be largely reduced by controlling precisely the bias with small domain size. On the other hand, the choices on bias voltages depend on the application executed on the platform, especially its mapping. In this paper, we propose to apply a multi-objective optimization for the application mapping and the body bias control on an energy efficient CGRA called CC-SOTB (Cool Mega Array Cube-SOTB). By using an NSGA-II algorithm for the mapping exploration and Integer Linear Programming (ILP) for the body bias control optimization, we show that it is possible to achieve better power consumption results than in previous works. For instance, in the case of a domain size of 2 rows by 1 column, it is possible to achieve a power reduction ratio up to 43.25%, compared to 21.09% previously, for the studied application. This is however achieved at the cost of a bigger mapping width. Nonetheless, the exploration allows to have finer analyses about both mapping and consumption. Indeed, these promising results show that optimizing the application mapping simultaneously with the body bias control can provide more interesting results, giving deeper quantitative information about trade-off possibilities.

本文言語English
ホスト出版物のタイトルProceedings - IEEE 11th International Symposium on Embedded Multicore/Many-Core Systems-on-Chip, MCSoC 2017
出版社Institute of Electrical and Electronics Engineers Inc.
ページ143-150
ページ数8
ISBN(電子版)9781538634417
DOI
出版ステータスPublished - 2018 3 26
イベント11th IEEE International Symposium on Embedded Multicore/Many-Core Systems-on-Chip, MCSoC 2017 - Seoul, Korea, Republic of
継続期間: 2017 9 182017 9 20

出版物シリーズ

名前Proceedings - IEEE 11th International Symposium on Embedded Multicore/Many-Core Systems-on-Chip, MCSoC 2017
2018-January

Other

Other11th IEEE International Symposium on Embedded Multicore/Many-Core Systems-on-Chip, MCSoC 2017
国/地域Korea, Republic of
CitySeoul
Period17/9/1817/9/20

ASJC Scopus subject areas

  • 安全性、リスク、信頼性、品質管理
  • ハードウェアとアーキテクチャ
  • 信号処理

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