ERfair Scheduler with Processor Shutdown

Putting the processor into shutdown state when it is idling is one of the primary methodologies towards the reduction of energy consumption in today´s systems where leakage power is emerging as a dominant concern. This paper presents ERfair Scheduler with Processor Shutdown (ESPS), a uniprocessor ERfair scheduler that attempts to minimize energy consumption in rate-based periodic real-time task systems by locally maximizing processor shut-down intervals while simultaneously maintaining proportional fairness among task executions. Evaluation results show that our proposed algorithm achieves good shut-down efficiency and provides upto 9 times higher effective shutdown lengths as compared to the Basic_ERfair scheduler.