Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/6708
Título: Intra-Task Device Scheduling for Real-Time Embedded Systems
Autor: Awan, Muhammad Ali
Petters, Stefan M.
Palavras-chave: Device power management
Multiple sleep state devices
Multi-state devices
Real-time energy management
Intra-task device scheduling
Data: Set-2015
Editora: Elsevier
Relatório da Série N.º: Journal of Systems Architecture;Vol. 61, Issue 8
Resumo: An ever increasing need for extra functionality in a single embedded system demands for extra Input/Output (I/O) devices, which are usually connected externally and are expensive in terms of energy consumption. To reduce their energy consumption, these devices are equipped with power saving mechanisms. While I/O device scheduling for real-time (RT) systems with such power saving features has been studied in the past, the use of energy resources by these scheduling algorithms may be improved. Technology enhancements in the semiconductor industry have allowed the hardware vendors to reduce the device transition and energy overheads. The decrease in overhead of sleep transitions has opened new opportunities to further reduce the device energy consumption. In this research effort, we propose an intra-task device scheduling algorithm for real-time systems that wakes up a device on demand and reduces its active time while ensuring system schedulability. This intra-task device scheduling algorithm is extended for devices with multiple sleep states to further minimise the overall device energy consumption of the system. The proposed algorithms have less complexity when compared to the conservative inter-task device scheduling algorithms. The system model used relaxes some of the assumptions commonly made in the state-of-the-art that restrict their practical relevance. Apart from the aforementioned advantages, the proposed algorithms are shown to demonstrate the substantial energy savings.
Peer review: yes
URI: http://hdl.handle.net/10400.22/6708
DOI: 10.1016/j.sysarc.2015.07.001
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S1383762115000612
Aparece nas colecções:ISEP – CISTER – Artigos

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