Paper Details

Schedulability Analysis of Timed CSP Models Using the PAT Model Checker

Authors: Oguz, Oguzcan, Broenink, Jan F., Mader, Angelika

Abstract:

Timed CSP can be used to model and analyse real-time and concurrent behaviour of embedded control systems. Practical CSP implementations combine the CSP model of a real-time control system with prioritized scheduling to achieve efficient and orderly use of limited resources. Schedulability analysis of a timed CSP model of a system with respect to a scheduling scheme and a particular execution platform is important to ensure that the system design satisfies its timing requirements. In this paper, we propose a framework to analyse schedulability of CSP-based designs for non-preemptive fixed-priority multiprocessor scheduling. The framework is based on the PAT model checker and the analysis is done with dense-time model checking on timed CSP models. We also provide a schedulability analysis workflow to construct and analyse, using the proposed framework, a timed CSP model with scheduling from an initial untimed CSP model without scheduling. We demonstrate our schedulability analysis workflow on a case study of control software design for a mobile robot. The proposed approach provides non-pessimistic schedulability results.

Proceedings:

Communicating Process Architectures 2012, Peter H. Welch, Frederick R. M. Barnes, Kevin Chalmers, Jan Bækgaard Pedersen, Adam T. Sampson, 2012, pp 65 - 88 published by Open Channel Publishing Ltd., Bicester

Files: Paper (PDF), Slides (PDF)

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