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Queueing Networks Analysis with the qnetworks Toolbox

M. Marzolla

UBLCS-2012-02

University of Bologna (Italy). Department of Computer Science.

Queueing Networks (QNs) are a widely used performance modeling notation, which has been successfully applied to many kind of systems. Despite the wealth of scientific literature on the solution of QN models, there are very few available implementations of these solution techniques. In this paper we describe
qnetworks, a free software package for Queueing Network analysis written in GNU Octave.
qnetworks allows users to compute performance measures of Markov chains, single-station queueing systems and product- and some non product-form QN models. We present some practical examples showing how qnetworks can be used for reliability analysis, capacity planning and general systems modeling and evaluation.