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Modeling Symmetric computer Architectures by SWNs.

Chiola, G.; Franceschinis, G.; Gaeta, R.

In: Valette, R.: Lecture Notes in Computer Science, Vol. 815; Application and Theory of Petri Nets 1994, Proceedings 15th International Conference, Zaragoza, Spain, pages 139-158. Springer-Verlag, 1994.

Abstract: Timed and Stochastic Well-formed colored nets (SWNs) have been introduced as a good modeling tool for complex systems with inherently high degree of symmetry. Analysis and simulation algorithms allow the automatic expoitation of model symmetries to improve their efficiency. Fairly strong constraints are posed ov er the color definition syntax in order to support such automatic symmetry exploitation as compared to other high level Petri net formalisms. In this paper we derive several models of parallel computer architectures in order to show not only that the formalism is adequate for this class of applications, but also how the different types of symmetries can be mapped into the allowed specification formalism. From this set of case studies we conclude that SWNs are an ``intermediate level'' formalism, closer to the application domain that P/T nets, yet requiring some ingenuity and experience from the modeler in order to exploint their (high) potential

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