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Online intra-task device scheduling for hard real-time systems

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2 Author(s)
Awan, M.A. ; CISTER Res. Unit, ISEP-IPP Porto, Porto, Portugal ; Petters, S.M.

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 real-time 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.

Published in:

Industrial Embedded Systems (SIES), 2012 7th IEEE International Symposium on

Date of Conference:

20-22 June 2012

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