Online Intra-Task Device Scheduling for Hard Real-Time Systems
Ref: HURRAY-TR-120602 Publication Date: 20 to 22, Jun, 2012
Online Intra-Task Device Scheduling for Hard Real-Time SystemsRef: HURRAY-TR-120602 Publication Date: 20 to 22, Jun, 2012
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.
7th IEEE International Symposium on Industrial Embedded Systems (SIES 2012), IEEE, pp 48-56.