Adaptive power gating for function units in a microprocessor

Kimiyoshi Usami, Tatsunori Hashida, Satoshi Koyama, Tatsuya Yamamoto, Daisuke Ikebuchi, Hideharu Amano, Mitaro Namiki, Masaaki Kondo, Hiroshi Nakamura

研究成果: Conference contribution

7 引用 (Scopus)

抜粋

This paper describes adaptive fine-grain control to power gate function units based on temperature dependent breakeven time (BET). An analytical model to express the temperature dependent BET is introduced and the accuracy of the model was examined. Results demonstrated that the model well represents the exponential decrease in BET with the temperature. Meanwhile, it was found that the accuracy gets worse at higher temperature and the cause is energy dissipation due to transient glitch at the wakeup. We propose four power-gating policies employing time-based or history-based approaches. Effectiveness in energy savings was evaluated using real design data of four function units in a microprocessor implemented in a 65nm technology. Results showed that introducing adaptive control to make use of temperature-dependent BET enhances energy savings by up to 21% in the time-based approach and by up to 18% in the history-based approach. The adaptive history-based policy with a limiter outperforms the adaptive time-based policy in energy savings and reduces the total energy of four function units to 11.8% at 100°C as compared to the non-powergating case.

元の言語English
ホスト出版物のタイトルProceedings of the 11th International Symposium on Quality Electronic Design, ISQED 2010
ページ29-37
ページ数9
DOI
出版物ステータスPublished - 2010 5 28
イベント11th International Symposium on Quality Electronic Design, ISQED 2010 - San Jose, CA, United States
継続期間: 2010 3 222010 3 24

出版物シリーズ

名前Proceedings of the 11th International Symposium on Quality Electronic Design, ISQED 2010

Conference

Conference11th International Symposium on Quality Electronic Design, ISQED 2010
United States
San Jose, CA
期間10/3/2210/3/24

    フィンガープリント

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

これを引用

Usami, K., Hashida, T., Koyama, S., Yamamoto, T., Ikebuchi, D., Amano, H., Namiki, M., Kondo, M., & Nakamura, H. (2010). Adaptive power gating for function units in a microprocessor. : Proceedings of the 11th International Symposium on Quality Electronic Design, ISQED 2010 (pp. 29-37). [5450407] (Proceedings of the 11th International Symposium on Quality Electronic Design, ISQED 2010). https://doi.org/10.1109/ISQED.2010.5450407