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实时系统中的熵容错模型研究
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作者 文成玉 高洋 杜鸿 《成都信息工程学院学报》 2014年第2期173-178,共6页
针对硬实时系统中采用的N重冗余容错模式存在代价大和容错效率不高的问题,在硬实时分布并行系统中提出了一种熵容错模型,将数据/任务按给定的约束分割为惯性和非惯性两个子集,其中惯性分量的未来状态是可估值的,非惯性分量是不可预测的... 针对硬实时系统中采用的N重冗余容错模式存在代价大和容错效率不高的问题,在硬实时分布并行系统中提出了一种熵容错模型,将数据/任务按给定的约束分割为惯性和非惯性两个子集,其中惯性分量的未来状态是可估值的,非惯性分量是不可预测的。在容错实现中,对惯性分量不做冗余,在故障引起的间断期则对其估值;对非惯性分量进行多重冗余,从而使系统在故障活动期内仍能提供可信服务。应用证明该模型在惯性分量权重较高的系统中能够以低于2的容错因子包容多个故障,改善容错效率。 展开更多
关键词 计算机软件与理论 实时系统 容错模型 容错因子 低成本容错
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Low-cost fault tolerance in evolvable multiprocessor systems:a graceful degradation approach
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作者 Shervin VAKILI Sied Mehdi FAKHRAIE +1 位作者 Siamak MOHAMMADI Ali AHMADI 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2009年第6期922-926,共5页
The evolvable multiprocessor (EvoMP), as a novel multiprocessor system-on-chip (MPSoC) machine with evolvable task decomposition and scheduling, claims a major feature of low-cost and efficient fault tolerance. Non-ce... The evolvable multiprocessor (EvoMP), as a novel multiprocessor system-on-chip (MPSoC) machine with evolvable task decomposition and scheduling, claims a major feature of low-cost and efficient fault tolerance. Non-centralized control and adaptive distribution of the program among the available processors are two major capabilities of this platform, which remarkably help to achieve an efficient fault tolerance scheme. This letter presents the operational as well as architectural details of this fault tolerance scheme. In this method, when a processor becomes faulty, it will be eliminated of contribution in program execution in remaining run-time. This method also utilizes dynamic rescheduling capability of the system to achieve the maximum possible efficiency after processor reduction. The results confirm the efficiency and remarkable advantages of the proposed approach over common redundancy based techniques in similar systems. 展开更多
关键词 Fault tolerance Multiprocessor system-on-chip (MPSoC) Genetic algorithm (GA) Adaptive task scheduling
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