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.