Geyser-1: A MIPS R3000 CPU core with fine grain runtime power gating

D. Ikebuchi; N. Seki; Y. Kojima; M. Kamata; L. Zhao; H. Amano; T. Shirai; S. Koyamat; T. Hashida; Y. Umahashi; H. Masuda; K. Usami; S. Takeda; H. Nakamura; M. Namiki; M. Kondo

doi:10.1109/ASSCC.2009.5357257

Geyser-1: A MIPS R3000 CPU core with fine grain runtime power gating

D. Ikebuchi, N. Seki, Y. Kojima, M. Kamata, L. Zhao, H. Amano, T. Shirai, S. Koyamat, T. Hashida, Y. Umahashi, H. Masuda, K. Usami, S. Takeda, H. Nakamura, M. Namiki, M. Kondo

Department of Information and Computer Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

33 Citations (Scopus)

Abstract

Geyser-1, a prototype MIPS R3000 CPU with fine grain runtime PG for major computational components in the execution stage is available. Function units such as CLU, shifter, multiplier and divider are power-gated and controlled at runtime such that only the function unit to be used is powered-on to minimize the leakage power. The evaluation results on the real chip reveals that the fine grain runtime PG mechanism works without electric problems. It reduces the leakage power 7% at 25 °C and 24% at 80°C. The evaluation results using benchmark programs show that the power consumption can be reduced from 3% at 25°C and 30% at 80° C.

Original language	English
Title of host publication	Proceedings of Technical Papers - 2009 IEEE Asian Solid-State Circuits Conference, A-SSCC 2009
Pages	281-284
Number of pages	4
DOIs	https://doi.org/10.1109/ASSCC.2009.5357257
Publication status	Published - 2009
Event	2009 IEEE Asian Solid-State Circuits Conference, A-SSCC 2009 - Taipei, Taiwan, Province of China Duration: 2009 Nov 16 → 2009 Nov 18

Publication series

Name	Proceedings of Technical Papers - 2009 IEEE Asian Solid-State Circuits Conference, A-SSCC 2009

Conference

Conference	2009 IEEE Asian Solid-State Circuits Conference, A-SSCC 2009
Country/Territory	Taiwan, Province of China
City	Taipei
Period	09/11/16 → 09/11/18

ASJC Scopus subject areas

Hardware and Architecture
Electrical and Electronic Engineering

Access to Document

10.1109/ASSCC.2009.5357257

Cite this

Ikebuchi, D., Seki, N., Kojima, Y., Kamata, M., Zhao, L., Amano, H., Shirai, T., Koyamat, S., Hashida, T., Umahashi, Y., Masuda, H., Usami, K., Takeda, S., Nakamura, H., Namiki, M., & Kondo, M. (2009). Geyser-1: A MIPS R3000 CPU core with fine grain runtime power gating. In Proceedings of Technical Papers - 2009 IEEE Asian Solid-State Circuits Conference, A-SSCC 2009 (pp. 281-284). Article 5357257 (Proceedings of Technical Papers - 2009 IEEE Asian Solid-State Circuits Conference, A-SSCC 2009). https://doi.org/10.1109/ASSCC.2009.5357257

Geyser-1: A MIPS R3000 CPU core with fine grain runtime power gating. / Ikebuchi, D.; Seki, N.; Kojima, Y. et al.
Proceedings of Technical Papers - 2009 IEEE Asian Solid-State Circuits Conference, A-SSCC 2009. 2009. p. 281-284 5357257 (Proceedings of Technical Papers - 2009 IEEE Asian Solid-State Circuits Conference, A-SSCC 2009).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Ikebuchi, D, Seki, N, Kojima, Y, Kamata, M, Zhao, L, Amano, H, Shirai, T, Koyamat, S, Hashida, T, Umahashi, Y, Masuda, H, Usami, K, Takeda, S, Nakamura, H, Namiki, M & Kondo, M 2009, Geyser-1: A MIPS R3000 CPU core with fine grain runtime power gating. in Proceedings of Technical Papers - 2009 IEEE Asian Solid-State Circuits Conference, A-SSCC 2009., 5357257, Proceedings of Technical Papers - 2009 IEEE Asian Solid-State Circuits Conference, A-SSCC 2009, pp. 281-284, 2009 IEEE Asian Solid-State Circuits Conference, A-SSCC 2009, Taipei, Taiwan, Province of China, 09/11/16. https://doi.org/10.1109/ASSCC.2009.5357257

Ikebuchi D, Seki N, Kojima Y, Kamata M, Zhao L, Amano H et al. Geyser-1: A MIPS R3000 CPU core with fine grain runtime power gating. In Proceedings of Technical Papers - 2009 IEEE Asian Solid-State Circuits Conference, A-SSCC 2009. 2009. p. 281-284. 5357257. (Proceedings of Technical Papers - 2009 IEEE Asian Solid-State Circuits Conference, A-SSCC 2009). doi: 10.1109/ASSCC.2009.5357257

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abstract = "Geyser-1, a prototype MIPS R3000 CPU with fine grain runtime PG for major computational components in the execution stage is available. Function units such as CLU, shifter, multiplier and divider are power-gated and controlled at runtime such that only the function unit to be used is powered-on to minimize the leakage power. The evaluation results on the real chip reveals that the fine grain runtime PG mechanism works without electric problems. It reduces the leakage power 7% at 25 °C and 24% at 80°C. The evaluation results using benchmark programs show that the power consumption can be reduced from 3% at 25°C and 30% at 80° C.",

author = "D. Ikebuchi and N. Seki and Y. Kojima and M. Kamata and L. Zhao and H. Amano and T. Shirai and S. Koyamat and T. Hashida and Y. Umahashi and H. Masuda and K. Usami and S. Takeda and H. Nakamura and M. Namiki and M. Kondo",

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AU - Zhao, L.

AU - Amano, H.

AU - Shirai, T.

AU - Koyamat, S.

AU - Hashida, T.

AU - Umahashi, Y.

AU - Masuda, H.

AU - Usami, K.

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Geyser-1: A MIPS R3000 CPU core with fine grain runtime power gating

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