Energy Efficient Real-Time Co-Scheduling of Multimedia DSP Jobs
Date Issued
2007
Date
2007
Author(s)
Chen, Chien-Wei
DOI
en-US
Abstract
While DSP's are now widely adopted in many embedded systems in the cost minimization and the resolving of computing needs of various multimedia applications, little work is done for energy-efficient real-time job scheduling over DSP's. As motivated by the needs, a set of sliding-window-based algorithms are proposed. A sequence of time points and their corresponding processor speeds is generated to run jobs of a periodic task on the DSP, such as that for the decoding of an H.264 stream. An online competitive DVS scheme for energy minimization with constrained buffer size consideration is proposed, and the capability of the scheme is evaluated by a series of experiments over real and synthesized traces. It was shown that roughly 45% energy saving was possible for many cases, and prediction errors were not significant enough to result in more than 4% in deadline missing.
Subjects
省電排程
即時工作排程
即時系統
動態電壓調整排程
能源消耗最小化
雙核系統
Energy-efficient scheduling
Real-time task scheduling
Real-time systemsDVS scheduling
Energy consumption minimization
Dual-core systems
SDGs
Type
thesis
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