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Journal of Algorithms
Volume 52, Issue 2, August 2004, Pages 193-206
 
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doi:10.1016/j.jalgor.2003.10.004    How to Cite or Link Using DOI (Opens New Window)
Copyright © 2003 Elsevier Inc. All rights reserved.

Performance guarantee for edf under overloadstar, open

Tak-Wah Lama, Corresponding Author Contact Information, 1, E-mail The Corresponding Author, Tsuen-Wan Johnny Nganb, 1, E-mail The Corresponding Author and Kar-Keung Toa, E-mail The Corresponding Author

aDepartment of Computer Science, University of Hong Kong, Pokfulam Road, Hong Kong bDepartment of Computer Science, Rice University, Houston, TX 77005, USA

Received 12 December 2002. 
Available online 10 January 2004.

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Abstract

Earliest deadline first (edf) is a widely used algorithm for online deadline scheduling. It has been known for long that edf is optimal for scheduling an underloaded, single-processor system; recent results on the extra-resource analysis of edf further revealed that edf when using moderately faster processors can achieve optimal performance in the underloaded, multi-processor setting. This paper initiates the extra-resource analysis of edf for overloaded systems, showing that edf supplemented with a simple form of admission control can provide a similar performance guarantee in both the single and multi-processor settings.

Keywords: Online algorithms; Extra-resource analysis; Firm deadline scheduling; Earliest deadline first


Journal of Algorithms
Volume 52, Issue 2, August 2004, Pages 193-206
 
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