Energy-Constrained Standby-Sparing for Weakly Hard Real-Time Systems
Energy-Constrained Standby-Sparing for Weakly Hard Real-Time Systems
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DOI：
10.1109/rtss49844.2020.00032
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发表时间：
2020-12
期刊：
影响因子：
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通讯作者：
Linwei Niu;D. Rawat
中科院分区：
文献类型：
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作者：
Linwei Niu;D. Rawat
对于实时嵌入式系统，QoS（服务质量）、容错和能源预算约束是主要的设计关注点。本文研究了弱硬实时系统的能量约束备用节省问题。备用备用系统采用一个主处理器和一个备用处理器来提供永久和短暂故障的容错能力。为了保证这类系统的可行性，本文首先针对能量预算约束较严格的备用备用系统提出了两种新的调度方案。然后在此基础上提出了一种混合方法以获得更好的性能。评估结果表明，在给定能量预算约束下，所提出的技术在保证QoS和容错性的同时，在可行性和系统性能方面显著优于现有的最先进方法。
For real-time embedded systems, QoS (Quality of Service), fault tolerance, and energy budget constraint are among the primary design concerns. In this research, we investigate the problem of energy constrained standby-sparing for weakly hard real-time systems. The standby-sparing systems adopt a primary processor and a spare processor to provide fault tolerance for both permanent and transient faults. With the purpose of ensuring the feasibility of such kind of systems, we firstly present two novel scheduling schemes for the standby-sparing systems with tighter energy budget constraint than the traditional ones. Then based on them a hybrid approach is proposed to achieve better performance. The evaluation results demonstrated that the proposed techniques significantly outperformed the existing state of the art approaches in terms of feasibility and system performance while ensuring QoS and fault tolerance under given energy budget constraint.