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Online intra-task device scheduling for hard real-time systems
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A large part of power dissipation in a system is generated by I/O devices. Increasingly these devices provide power
saving mechanisms, inter alia to enhance battery life. While I/O device scheduling has been studied in the past for realtime
systems, the use of energy resources by these scheduling algorithms may be improved. These approaches are
crafted considering a very large overhead of device transitions. Technology enhancements have allowed the hardware
vendors to reduce the device transition overhead and energy consumption. We propose an intra-task device scheduling
algorithm for real time systems that allows to shut-down devices while ensuring system schedulability. Our results show
an energy gain of up to 90% when compared to the techniques proposed in the state-of-the-art.
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IEEE