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دانلود رایکان مقاله انگلیسی ISI با موضوع زمانبندی مقاوم در برابر تحمل خطای دینامیکی برای تکالیف زمان حقیقی در پردازنده های چند هسته ای

عنوان فارسی مقاله:

DFTS: یک زمانبندی مقاوم در برابر تحمل خطای دینامیکی برای تکالیف زمان حقیقی در پردازنده های چند هسته ای

عنوان انگلیسی مقاله:

DFTS: A dynamic fault-tolerant scheduling for real-time tasks in multicore processors

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7. Conclusions and future works

In this paper, a dynamic fault-tolerant scheduling algorithm called DFTS has been proposed. This algorithm uses task utilization to dynamically select the type of fault recovery method in order to tolerate the maximum number of multiple spatial and temporal faults. Each task is categorized into critical or noncritical based on the task utilization and the time at which scheduler allocates resources to the task. Noncritical tasks are scheduled on a single core, and checkpointing with rollback recovery will be applied to them. Critical tasks will be replicated on separated cores to increase the probability of on time completion of the task in the presence of faults. Experimental results on several applications running on multi-core processors show that fault-tolerant scheduling feasibility rate of DFTS is higher than conventional methods for different fault rates and checkpoint costs. Moreover, the maximum fault-tolerance overhead is lower than the checkpointing with rollback recovery method, whereas the maximum overhead of DFTS is always lower than 53% for various checkpoint parameters. Concerning to optimality of the proposed method, it should be mentioned that the proposed method is a heuristic method utilizing EDF. Each heuristic method is not necessarily optimal. However, experimental results reveal that the proposed method has better fault-tolerance property compared to the other related works.