Resource sharing estimation by Petri nets in PISH hardware/software co-design system

The article presents two approaches for computing the number of functional units in a hardware/software codesign context. The proposed hardware/software codesign framework uses the Petri net as a common formalism for performing quantitative and qualitative analysis. The use of the Petri net as an intermediate format allows us to analyze properties of the specification and formally compute performance indices which are used in the partitioning process. The paper is devoted to describing the algorithms for functional unit estimation. The work also proposes a method of extending the Petri net model in order to take into account causal constraints provided by the designers. However, an overview of the general hardware/software codesign method is also presented