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Erschienen in:
2011 | OriginalPaper | Buchkapitel
A Dynamic Slack Management Technique for Real-Time System with Precedence and Resource Constraints
verfasst von : Santhi Baskaran, Perumal Thambidurai
Erschienen in: Advances in Computing and Information Technology
Verlag: Springer Berlin Heidelberg
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Energy consumption is a critical design issue in embedded systems, especially in battery-operated systems. Dynamic Voltage Scaling and Dynamic Frequency Scaling allow us to adjust supply voltage and processor frequency to adapt to the workload demand for better energy management. For a set of real-time tasks with precedence and resource constraints executing on a distributed embedded system, we propose a dynamic energy efficient scheduling algorithm with weighted First Come First Served (WFCFS) scheme, which also considers the run-time behaviour of tasks, to further explore the idle periods of processors. Our algorithm is compared with the Service-Rate-Proportionate (SRP) Slack Distribution Technique which uses FCFS and Weighted scheduling schemes. Our proposed algorithm achieves about 6 percent more energy savings and increased reliability over the existing one.