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Energy-aware EDZL Scheduling of Periodic Tasks on Multicore Systems

DVFS (Dynamic Voltage/Frequency Scaling) has been a significant technique for reducing energy consumption of processors. Energy-aware scheduling schemes make use of DVFS feature of processors to adjust the execution speed of processors depending upon workload; high speed for heavy workload and low speed for light workload. This paper proposes a combined DVFS scheme for EDZL (Earliest Deadline until Zero Laxity)scheduling. The scheme combines a per-core DVFS technique that calculates tasks' individual speed and MOTE technique that lowers the execution speed of a core by reclaiming slack time. Experiment results show that our scheme can decrease the energy consumption in executing periodic task.