A CCS-based investigation of deadlock in a multi-process electronic mail system

Author:

Brebner Gordon1

Affiliation:

1. Department of Computer Science, University of Edinburgh, James Clerk Maxwell Building, Mayfield Road, EH9 3JZ, Edinburgh, UK

Abstract

Abstract The networking software for a VAX/VMS computer system had been implemented as a collection of communicating processes. One night, an unusually high load on the electronic mail component of the software caused deadlock to occur between two of the processes. This paper describes how the deadlock was analysed by modelling the software using the Calculus of Communicating Systems (CCS) and then by investigating the behaviour of the model using the Edinburgh Concurrency Workbench (CWB). The analysis suggested how the software should be restructured to prevent the problem recurring; the new set of processes was analysed, and shown to be deadlock-free.

Publisher

Association for Computing Machinery (ACM)

Subject

Theoretical Computer Science,Software

Reference11 articles.

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3. The Concurrency Workbench;Cleaveland R.;Springer-Verlag LNCS,1990

4. Evaluation of Tools for the Analysis of Communicating Systems;Inverardi P.;Bulletin of the EATCS,1991

5. Results on the propositional μ-calculus

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