Performance modelling and analysis of real time systems: A review

Proper functioning of any Real Time System depends on both functional and non-functional properties of the system. Validation of functional aspect is usually done after the deployment of the system in the functional environment. But the validation of nonfunctional properties at later stage could lead to the system changes which could be costly at later stage. Early stage evaluation of the nonfunctional properties is beneficial. One of such nonfunctional property of Real Time System considered in this survey is performance. The performance evaluation determines how the system functions when provided with the functional environment. Since it is an early stage prediction, system is presented using artifacts that represent various views of the system from both functional and nonfunctional aspects. This paper highlights some of the works done in past using UML as the standard to provide system specifications and the analysis is performed on the performance model derive from the UML model.