NDLI: On a novel property of the earliest deadline first algorithm

Content Provider	IEEE Xplore Digital Library
Author	Hongya Wang Jie Jin Zhijun Wang LihChyun Shu
Copyright Year	2011
Description	Author affiliation: School of Computer Science and Technology, Donghua University, Shanghai, China (Hongya Wang; Jie Jin; Zhijun Wang) \|\| College of Management, National Cheng Kung University, Taiwan, ROC (LihChyun Shu)
Abstract	Real-time scheduling theory plays a key role in many time critical control systems or applications. In this paper, an interesting property of the Earliest Deadline First (EDF) algorithm, which has never been discussed before, is examined. To be specific, we conjecture that if a task set is schedulable under EDF, then for any task pair (τi, τj) such that pi ≥ pj in this task set, there must be at least one whole execution of τj occurring between the release time and deadline of any τi's job. Although this property is not hard to describe, its proof is far more difficult than expected. To prove this property, we first show the correctness of the conjecture for task sets consisting of only two real-time tasks. In view of the hardness in extending the proof to task sets having more than 2 members, extensive simulation experiments are conducted to support our intuition for general cases. The conjecture holds under a substantial number of parameter settings we have tried.
Starting Page	197
Ending Page	201
File Size	189694
Page Count	5
File Format	PDF
ISBN	9781612841809
e-ISBN	9781612841816
DOI	10.1109/FSKD.2011.6019496
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-26
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Real time systems Schedules the earliest deadline first algorithm Mobile communication Educational institutions Timing timing analysis real-time scheduling Scheduling algorithm real-time control systems
Content Type	Text
Resource Type	Article

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