Geyser-1: MIPS R3000 CPU内核，具有细粒度运行时功率门控

2009 IEEE Asian Solid-State Circuits Conference Pub Date : 2009-12-22 DOI:10.1109/ASSCC.2009.5357257

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

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引用次数: 40

摘要

Geyser-1是MIPS R3000原型CPU，在执行阶段为主要计算组件提供细粒度运行时PG。功能单元，如CLU，移位器，乘法器和分法器，在运行时进行电源门控和控制，以便只有要使用的功能单元通电，以尽量减少泄漏功率。在实际芯片上的评测结果表明，该细粒运行PG机构工作无电气问题。在25℃时降低泄漏功率7%，在80℃时降低24%。使用基准程序的评估结果表明，功耗在25°C时可降低3%，在80°C时可降低30%。

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

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.

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2009 IEEE Asian Solid-State Circuits Conference

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