Copyright © 2003 Elsevier Inc. All rights reserved.
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







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