In this paper, we present a prototype MIPS R3000 processor, which integrates the fine-grained power gating technique into its functional units. To reduce the leakage power consumption, functional units, such as multiplier and divider can be power-gated individually according to the workload of the execution program. The prototype chip . Geyser-1 has been implemented with Fujitsu's 65 nm CMOS technology; and to facilitate the design process with fine-grained power gating, a fully automated design flow has also been proposed. Comprehensive real-chip evaluations have been performed to verify the leakage reduction efficiency. According the evaluation results with benchmark programs, the fine-grained power gating can reduce the power of the processor by 5% at 25°C and 23% at 80°C.
|Number of pages||11|
|Journal||IPSJ Transactions on System LSI Design Methodology|
|Publication status||Published - 2011|
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering