Applying an Integrated Modelling Process to Run-time Management of Many-Core Systems

A Run-Time Management system for many-core architecture is aware of application requirements and able to save energy by sacrificing performance when it will have negligible impact on user experience. This paper outlines the application of a process for development of a run-time management system that integrates a range of modelling, validation, verification and generation tools at appropriate stages. We outline the models, process and tools we used to develop a temperature aware run-time management system for Dynamic Voltage and Frequency Scaling (DVFS) of a media display application. The Event Refinement Structure (ERS) approach is used to visualise the abstract level of the DVFS control. The Model Decomposition technique is used to tackle the complexity of the model. To model the process-oriented aspects of the system we used iUML-B Statemachines. We use several different visual animation tools, running them synchronously to exploit their different strengths, in order to demonstrate the model to stakeholders. In addition, a continuous model of the physical properties of the cores is simulated in conjunction with discrete simulation of the Event-B run-time management system. Finally executable code is generated automatically using the Code Generation plug-in. The main contribution of this paper is to demonstrate the complementarity of the tools and the ease of their integrated use through the Rodin platform.