NDLI: Limitations of liveness in concurrent software systems

Content Provider	IEEE Xplore Digital Library
Author	Iordache, M.V. Antsaklis, P.J.
Copyright Year	2010
Description	Author affiliation: School of Engineering & Engineering Technology, LeTourneau University, Longview, TX 75607, USA (Iordache, M.V.) \|\| Department of Electrical Engineering, University of Notre Dame, IN 46556, USA (Antsaklis, P.J.)
Abstract	A desirable property of software is that from any reachable state any transition of interest will eventually take place. In this paper, software satisfying this property will be said to be responsive. Responsiveness can be studied on untimed DES models of the software. The paper shows that DES liveness is not sufficient to guarantee that the software will be responsive. Two causes of this problem are identified, namely transition determinism and operation timing. Transition determinism refers to the fact that not any DES enabled transition may be fired, but only the specific transition selected by the software. Operation timing refers to the times at which software execution stages take place. Conditions required to fire a transition may become unlikely or impossible due to operation timing. To address these issues, explicit modeling of deterministic choice is proposed and a special DES structure is introduced. Then, a sufficient condition is formulated under which DES liveness implies software responsiveness. This sufficient condition is then applied to the supervisory control problem in order to identify a class of liveness enforcing supervisors that ensure responsiveness. While Petri nets are used here to represent the DES models, the results are also relevant in the automata framework.
Starting Page	3252
Ending Page	3257
File Size	168084
Page Count	6
File Format	PDF
ISBN	9781424477456
ISSN	07431546
e-ISBN	9781424477463
DOI	10.1109/CDC.2010.5718167
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-12-15
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Software systems System recovery Synchronization Monitoring Automata
Content Type	Text
Resource Type	Article
Subject	Control and Optimization Control and Systems Engineering Modeling and Simulation

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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