Discrete Frequency Selection of Frame-Based Stochastic Real-Time Tasks

Details Discrete Frequency Selection of Frame-Based Stochastic Real-Time Tasks Discrete Frequency Selection of Frame-Based Stochastic Real-Time Tasks

2008-03-30

arxiv.org/abs/0803.4308v2

Computer Science

Operating Systems

10 pages

Scientific paper

Energy-efficient real-time task scheduling has been actively explored in the past decade. Different from the past work, this paper considers schedulability conditions for stochastic real-time tasks. A schedulability condition is first presented for frame-based stochastic real-time tasks, and several algorithms are also examined to check the schedulability of a given strategy. An approach is then proposed based on the schedulability condition to adapt a continuous-speed-based method to a discrete-speed system. The approach is able to stay as close as possible to the continuous-speed-based method, but still guaranteeing the schedulability. It is shown by simulations that the energy saving can be more than 20% for some system configurations

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