Real-time scheduling of aperiodic tasks in energy harvesting devices

This paper deals with the scheduling issue that arises in small energy harvesting devices. Such ones support both soft aperiodic tasks and hard deadline periodic tasks. The scheduler has to produce a sequence without deadline missing and with no energy starvation while reducing the response time of aperiodic tasks. The proposed servers, called BES (Background with Energy Surplus server) and BEP (Background with Energy Preserving server), are based on the classical background server and on the optimal ED-H scheduler. Experimental results demonstrate that the BEP server offers a substantial improvement over the BES server in terms of the aperiodic responsiveness under various time and energy settings.