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  1. A500 情報学部/情報学研究科・情報文化学部・情報科学研究科
  2. A500a 雑誌掲載論文
  3. 学術雑誌

Approximate Minimum Energy Point Tracking and Task Scheduling for Energy-Efficient Real-Time Computing

http://hdl.handle.net/2237/0002002732
http://hdl.handle.net/2237/0002002732
a590fa70-0645-4760-96d1-e0cc4c3e3951
名前 / ファイル ライセンス アクション
IEICE_CAD_Komori.pdf IEICE_CAD_Komori.pdf (8.7 MB)
Item type itemtype_ver1(1)
公開日 2022-05-13
タイトル
タイトル Approximate Minimum Energy Point Tracking and Task Scheduling for Energy-Efficient Real-Time Computing
言語 en
著者 KOMORI, Takumi

× KOMORI, Takumi

en KOMORI, Takumi

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MASUDA, Yutaka

× MASUDA, Yutaka

en MASUDA, Yutaka

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SHIOMI, Jun

× SHIOMI, Jun

en SHIOMI, Jun

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ISHIHARA, Tohru

× ISHIHARA, Tohru

en ISHIHARA, Tohru

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 Copyright(C)2022 IEICE
キーワード
主題Scheme Other
主題 minimum energy point tracking (MEPT)
キーワード
主題Scheme Other
主題 dynamic voltage and frequency scaling (DVFS)
キーワード
主題Scheme Other
主題 adaptive body biasing (ABB)
キーワード
主題Scheme Other
主題 real-time operating system (RTOS)
キーワード
主題Scheme Other
主題 soft real-time scheduling
内容記述
内容記述 In the upcoming Internet of Things era, reducing energy consumption of embedded processors is highly desired. Minimum Energy Point Tracking (MEPT) is one of the most efficient methods to reduce both dynamic and static energy consumption of a processor. Previous works proposed a variety of MEPT methods over the past years. However, none of them incorporate their algorithms with practical real-time operating systems, although edge computing applications often require low energy task execution with guaranteeing real-time properties. The difficulty comes from the time complexity for identifying an MEP and changing voltages, which often prevents real-time task scheduling. The conventional Dynamic Voltage and Frequency Scaling (DVFS) only scales the supply voltage. On the other hand, MEPT needs to adjust the body bias voltage in addition. This additional tuning knob makes MEPT much more complicated. This paper proposes an approximate MEPT algorithm, which reduces the complexity of identifying an MEP down to that of DVFS. The key idea is to linearly approximate the relationship between the processor frequency, supply voltage, and body bias voltage. Thanks to the approximation, optimal voltages for a specified clock frequency can be derived immediately. We also propose a task scheduling algorithm, which adjusts processor performance to the workload and then provides a soft real-time capability to the system. The operating system stochastically adjusts the average response time of the processor to be equal to a specified deadline. MEPT will be performed as a general task, and its overhead is considered in the calculation of the frequency. The experiments using a fabricated test chip and on-chip sensors show that the proposed algorithm is a maximum of 16 times more energy-efficient than DVFS. Also, the energy loss induced by the approximation is only 3% at most, and the algorithm does not sacrifice the fundamental real-time properties.
言語 en
内容記述タイプ Abstract
出版者
言語 ja
出版者 電子情報通信学会
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
関連情報
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1587/transfun.2021VLP0007
収録物識別子
収録物識別子タイプ PISSN
収録物識別子 0916-8508
書誌情報 en : IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences

巻 E105A, 号 3, p. 518-529, 発行日 2022-03-01
ファイル公開日
日付 2022-05-13
日付タイプ Available
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