On the optimization of two-class work-conserving parameterized scheduling policies

Jasper Vanlerberghe (), Tom Maertens (), Joris Walraevens (), Stijn Vuyst () and Herwig Bruneel ()
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Jasper Vanlerberghe: Ghent University (UGent)
Tom Maertens: Ghent University (UGent)
Joris Walraevens: Ghent University (UGent)
Stijn Vuyst: Ghent University (UGent)
Herwig Bruneel: Ghent University (UGent)

4OR, 2016, vol. 14, issue 3, No 3, 308 pages

Abstract: Abstract Numerous scheduling policies are designed to differentiate quality of service for different applications. Service differentiation can in fact be formulated as a generalized resource allocation optimization towards the minimization of some important system characteristics. For complex scheduling policies, however, optimization can be a demanding task, due to the difficult analytical analysis of the system at hand. In this paper, we study the optimization problem in a queueing system with two traffic classes, a work-conserving parameterized scheduling policy, and an objective function that is a convex combination of either linear, convex or concave increasing functions of given performance measures of both classes. In case of linear and concave functions, we show that the optimum is always in an extreme value of the parameter. Furthermore, we prove that this is not necessarily the case for convex functions; in this case, a unique local minimum exists. This information greatly simplifies the optimization problem. We apply the framework to some interesting scheduling policies, such as Generalized Processor Sharing and semi-preemptive priority scheduling. We also show that the well-documented $$c\mu $$ c μ -rule is a special case of our framework.

Keywords: Scheduling; Generalized processor sharing (GPS); Strict priority; Optimization; Queueing; 60K25; 68M20; 90B22 (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (4)

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DOI: 10.1007/s10288-016-0312-4

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