Design of DVFS Algorithm in Soft Real-Time Systems

A new DVFS algorithm meeting the constraints of soft real-time is proposed,based on the real-time DVFS model.Based on EDF algorithm,DVFS scheduling for soft real-time is implemented by taking advantage of features that task delay is accepted when predefined delay ratio is satisfied in the soft real-time system.Shortcoming of low-efficiency caused by the use of hard-time DVFS algorithms in soft real-time system is thus avoided.It is shown that the algorithm can satisfy with the requirements of soft real-time through simulation experiment.Experimental results have shown that SRT-DVFS saves 10% in energy consumption compared to LEDF.