A semi-preemptive priority scheduling discipline: Performance analysis

作者：Walraevens Joris; Maertens Tom^*; Bruneel Herwig

来源：European Journal of Operational Research, 2013, 224(2): 324-332.

DOI：10.1016/j.ejor.2012.08.008

• Priority scheduling
• (Non-)preemptive
• Performance analysis
• Cost function

In this paper, we present an in-depth analytical study of a semi-preemptive priority scheduling discipline. This discipline eliminates the deficits of both the full- and non-preemptive versions. Under the non-preemptive category, in particular, higher-priority customers may have to wait even when the service of a lower-priority customer has just started, while under the full-preemptive discipline, the almost completed service of a lower-priority customer may be interrupted due to the arrival of higher-priority customers, possibly causing a large extra delay. For fixed low-priority service times, the semi-preemptive priority scheduling discipline shows a performance gain of up to 6% compared to the full- and non-preemptive versions.

• 出版日期2013-1-16