Modeling a fibre channel switch with stochastic Petri nets

Abstract
As computing systems become increasingly complex and concurrent, performance analysis becomes more important, especially when designing an overall ar- chitecture. Simple numerical approximations can of- ten yield bounds on performance. Queueing theory and Markovian analysis can provide insight into the steady-state performance of the system. Discrete- event simulation can provide a more detailed view of the system behavior. We used all of the above tech- niques in the performance study of a Fibre Channel switch. An approximate stochastic Petri net (SPN) model was employed, obtained by exploiting sym- metries in the system. The most challenging aspect was determining transition ring probabilities that accurately reected the dynamic behavior of the ex- act SPN. This model was valided against a detailed simulation and found to be accurate within 3%. See (1) for details and references.

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