VANUCA: Enabling Near-Threshold Voltage Operation in Large-Capacity Cache

doi:10.1109/TVLSI.2015.2424440

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	VANUCA: Enabling Near-Threshold Voltage Operation in Large-Capacity Cache
	Wang, Ying; Han, Yinhe; Li, Huawei; Li, Xiaowei
刊名	IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS
	2016-03-01
卷号	24 期号:3 页码:858-870
关键词	Cache design fault tolerant multi-V-dd near-threshold voltage (NTV) nonuniform cache access (NUCA)
ISSN号	1063-8210
DOI	10.1109/TVLSI.2015.2424440
英文摘要	In this paper, we investigate the feasibility of voltage adjustment in a large capacity cache, and propose the architecture of voltage-adaptable nonuniform cache access (VANUCA) that exploits near-threshold computing and multivoltage domain to approach the limit of V-dd in a low-power cache. However, the adoption of near-threshold voltage (NTV) leads to a rocketing error probability in SRAM arrays, which has to be addressed by effective fault-tolerant techniques. Instead of using error correction code or data duplication, the VANUCA exploits the natural data redundancy across the whole memory hierarchy to enable fast fault recovery in the NTV cache. Based on the discovered data resilience and the multi-Vdd architecture, the VANUCA is able to match vulnerable/invulnerable data clusters to available high-/low-voltage domains by utilizing the data migration mechanism in dynamic NUCA. The proposed VANUCA includes two important architectural techniques: 1) static assignment that assumes a fixed voltage domain partitioning and 2) DataMotion that dynamically fits the working set into heterogeneous cache banks through Vdd switching. Experimental results show that the VANUCA achieves considerable improvements in energy efficiency over the conventional single-voltage domain NUCA cache.
资助项目	National Basic Research Program of China (973 Program)[2011CB302503] ; National Natural Science Foundation of China[61432017] ; National Natural Science Foundation of China[61176040] ; National Natural Science Foundation of China[61076037] ; National Natural Science Foundation of China[61202056] ; National Natural Science Foundation of China[61173006] ; National Natural Science Foundation of China[61221062]
WOS研究方向	Computer Science ; Engineering
语种	英语
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
WOS记录号	WOS:000371932100005
内容类型	期刊论文
源URL	[http://119.78.100.204/handle/2XEOYT63/8663]
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Han, Yinhe
作者单位	Chinese Acad Sci, State Key Lab Comp Architecture, Inst Comp Technol, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ying,Han, Yinhe,Li, Huawei,et al. VANUCA: Enabling Near-Threshold Voltage Operation in Large-Capacity Cache[J]. IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS,2016,24(3):858-870.
APA	Wang, Ying,Han, Yinhe,Li, Huawei,&Li, Xiaowei.(2016).VANUCA: Enabling Near-Threshold Voltage Operation in Large-Capacity Cache.IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS,24(3),858-870.
MLA	Wang, Ying,et al."VANUCA: Enabling Near-Threshold Voltage Operation in Large-Capacity Cache".IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS 24.3(2016):858-870.