1 research outputs found
Energy-aware Fixed-Priority Multi-core Scheduling for Real-time Systems
Multi-core processors are becoming more and more popular in embedded and
real-time systems. While fixed-priority scheduling with task-splitting in
real-time systems are widely applied, current approaches have not taken into
consideration energy-aware aspects such as dynamic voltage/frequency scheduling
(DVS). In this paper, we propose two strategies to apply dynamic voltage
scaling (DVS) to fixed-priority scheduling algorithms with task-splitting for
periodic real-time tasks on multi-core processors. The first strategy
determines voltage scales for each processor after scheduling (Static DVS),
which ensures all tasks meet the timing requirements on synchronization. The
second strategy adaptively determines the frequency of each task before
scheduling (Adaptive DVS) according to the total utilization of task-set and
number of cores available. The combination of frequency pre-allocation and
task-splitting makes it possible to maximize energy savings with DVS.
Simulation results show that it is possible to achieve significant energy
savings with DVS while preserving the schedulability requirements of real-time
schedulers for multi-core processors.Comment: conference extensio