NDLI: Integration of dynamic voltage scaling and soft real-time scheduling for open mobile systems

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Integration of dynamic voltage scaling and soft real-time scheduling for open mobile systems

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Integration of dynamic voltage scaling and soft real-time scheduling for open mobile systems

Content Provider	ACM Digital Library
Author	Nahrstedt, Klara Yuan, Wanghong
Abstract	Battery-powered mobile devices are becoming increasingly important computing platforms, which require low energy consumption while meeting the resource demands of a dynamic application workload. Most proposed dynamic voltage scaling (DVS) algorithms, targeting either best-effort or hard real-time systems, however, cannot be directly applied to such open mobile systems. This paper presents a framework to integrate DVS into soft real-time (SRT) scheduling for open mobile systems, achieving energy saving of DVS while preserving resource guarantees of SRT scheduling. The integrated framework makes three major contributions. First, multimedia applications reserve resource based on their average resource usage, without the knowledge of worst-case execution time, which is difficult to estimate in an open mobile environment. Second, the SRT scheduling ensures the correctness of reservation admission and enforcement in a variable speed context. Finally, the DVS manager reduces the processor energy consumption by utilizing the unallocated resource, reclaiming the allocated but unused resource, or avoiding the unused resource. Our extensive simulation results demonstrate that our framework is able to save 4% to 32% energy while slightly affecting application performance.
Starting Page	105
Ending Page	114
Page Count	10
File Format	PDF
ISBN	1581135122
DOI	10.1145/507670.507685
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2002-05-12
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Multimedia Power management Scheduling
Content Type	Text
Resource Type	Article

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