Feasibility Intervals for Fixed-Priority Real-Time Scheduling on Uniform Multiprocessors

Author(s):  
Liliana Cucu ◽  
Joel Goossens
Author(s):  
Gustavo A. Chaparro-Baquero ◽  
Soamar Homsi ◽  
Omara Vichot ◽  
Shaolei Ren ◽  
Gang Quan ◽  
...  

2015 ◽  
Vol 99 ◽  
pp. 85-96 ◽  
Author(s):  
Ming Fan ◽  
Qiushi Han ◽  
Shuo Liu ◽  
Shaolei Ren ◽  
Gang Quan ◽  
...  

Energy-aware real-time scheduling is gaining attention in recent years owing to environmental concerns and applications in numerous fields. System reliability also gets affected adversely with increasing energy dissipations posing serious challenges before the researchers. Keeping these in view, in recent times researchers have diverted to combining issues of fault-tolerance and energy efficiency. In literature, DVFS and DPM, most commonly used techniques for power management in task scheduling, are often combined with Primary/Backup technique to achieve fault tolerance against transient and permanent faults. Optimal algorithms, Earliest deadline first (EDF) and Rate-Monotonic (RM), meant for scheduling dynamic and fixed priority tasks respectively, have mainly been analyzed using a dual-processor approach for fault-tolerance and energy efficiency. In this paper, to handle higher workload of fixed-priority real-time tasks, energy-aware fault-tolerant scheduling algorithms are proposed for multiprocessor systems with balanced and unbalanced number of main and auxiliary processors. Simulations over extensive task-sets indicate that balanced approach is more energy-efficient than the unbalanced one.


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