Approximate data mapping in refresh-free DRAM for energy-efficient computing in modern mobile systems

doi:10.1016/j.comcom.2023.12.037

	Approximate data mapping in refresh-free DRAM for energy-efficient computing in modern mobile systems
	Li, Sen 1; Jin, Hui 2,3; Gao, Yingke 4; Wang, Ying 5; Dai, Shuhong 6; Xu, Yongjun 5; Cheng, Long 6
	2024-02-15
发表期刊	COMPUTER COMMUNICATIONS
ISSN	0140-3664
卷号	216 页码:151-158
摘要	In the context of modern mobile and embedded communication systems, the increasing storage density of dynamic random access memory (DRAM) poses significant challenges in energy management, with DRAM refresh emerging as a major factor in energy consumption. Meanwhile, approximate computing is becoming an emerging energy -efficient paradigm for mobile and embedded systems involving the error-resilient applications of media processing, recognition, and data mining. This paper proposes to leverage approximate computing to eliminate all the unnecessary refreshes in DRAM and makes it as energy -efficient as "non-volatile"devices. The devised solution is based on the observation that mapping the virtual page of certain reusing distances into the memory rows of the particular retention time intervals can greatly decrease or even completely eliminate refresh operations for approximate computing workloads. In the proposed Non -Volatile DRAM (NV -DRAM), special page allocation and data mapping strategies have been developed for different types of systems to control the Quality of Result (QoR) of the system and best exploit the allowable quality margin (precision loss) for refresh removing. A static data mapping policy and a control-theory inspired PID controller are proposed to dynamically map approximate work-set to NV -DRAM rows without infringing the QoR constraint. The results show that the error rate of our predictive strategies can be controlled under 1%, and our proposal saves more than 99.9% of refresh energy consumption.
关键词	DRAM Refresh Approximate computing Energy efficiency Mobile communication systems
DOI	10.1016/j.comcom.2023.12.037
收录类别	SCI
语种	英语
WOS研究方向	Computer Science ; Engineering ; Telecommunications
WOS类目	Computer Science, Information Systems ; Engineering, Electrical & Electronic ; Telecommunications
WOS记录号	WOS:001167946000001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/38855
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Cheng, Long
作者单位	1.China Acad Launch Vehicle Technol, Beijing, Peoples R China 2.Beihang Univ, Sch Elect & Informat Engn, Beijing, Peoples R China 3.Beihang Univ, Sch Integrated Circuit Sci & Engn, Beijing, Peoples R China 4.Beijing Inst Control Engn, Beijing, Peoples R China 5.Chinese Acad Sci, State Key Lab Comp Architecture, Inst Comp Technol, Beijing, Peoples R China 6.North China Elect Power Univ, Sch Control & Comp Engn, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Li, Sen,Jin, Hui,Gao, Yingke,et al. Approximate data mapping in refresh-free DRAM for energy-efficient computing in modern mobile systems[J]. COMPUTER COMMUNICATIONS,2024,216:151-158.
APA	Li, Sen.,Jin, Hui.,Gao, Yingke.,Wang, Ying.,Dai, Shuhong.,...&Cheng, Long.(2024).Approximate data mapping in refresh-free DRAM for energy-efficient computing in modern mobile systems.COMPUTER COMMUNICATIONS,216,151-158.
MLA	Li, Sen,et al."Approximate data mapping in refresh-free DRAM for energy-efficient computing in modern mobile systems".COMPUTER COMMUNICATIONS 216(2024):151-158.