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Autonomous high-speed serial link power management depending on required link performance for HMC

Title
Autonomous high-speed serial link power management depending on required link performance for HMC
Author
정기석
Keywords
power consumption; DRAM chips; power aware computing; three-dimensional integrated circuits; synchronisation; autonomous high-speed serial link power management; 3D-stacked dynamic RAMs; conventional DRAM; hybrid memory cube; 3D-stacked DRAMs; low-power modes; long mode transition times; high-speed link; active links; link performance; clock synchronisation; link power consumption reduction; low-power HMC-based system; CPU
Issue Date
2018-07
Publisher
INST ENGINEERING TECHNOLOGY-IET
Citation
ELECTRONICS LETTERS, v. 54, no. 15, page. 932-933
Abstract
Many studies on 3D-stacked dynamic RAMs (DRAMs) have been conducted to overcome the shortcomings of conventional DRAM. The hybrid memory cube (HMC) is one of the most promising 3D-stacked DRAMs, thanks to its high bandwidth and expandable structure. However, a high-speed serial link that interfaces the CPU and HMC consumes significant power, primarily because of the high overhead incurred in synchronising its clock. Although the link provides low-power modes, managing them is very difficult because of their long mode transition times. An autonomous power management method for the high-speed link is proposed. The proposed method determines the optimal number of active links while satisfying the required link performance. Simulations demonstrate that the proposed method reduces link power consumption by an average of 63.06% with a performance degradation of only 1.36%. Therefore, this proposed autonomous link power management is an outstanding option for low-power HMC-based systems.
URI
https://digital-library.theiet.org/content/journals/10.1049/el.2018.0997https://repository.hanyang.ac.kr/handle/20.500.11754/119443
ISSN
0013-5194; 1350-911X
DOI
10.1049/el.2018.0997
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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