Abstract
In the PAPS — parallel program performance prediction toolset — parallel systems are specified by the structure of the parallel program, the multiprocessor hardware, and the mapping of the program elements to processor nodes. The task scheduling strategy and the communication network behaviour is described in terms of timed Petri nets. Examples of Petri nets, reflecting different task scheduling strategies, are presented. A detailed Petri net performance model for the Virtual Channel Router (VCR) which is a software implementation of a packet switching communication kernel built upon a store & forward communication network is elaborated and validated. Resource parameters for an actual multiprocessor computer system running the VCR communication software are determined. A case study shows the applicability and accuracy of the presented Petri net performance models for VCR based packet switching communication networks.
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