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Fully-Automatic Derivation of Exact Program-Flow Constraints for a Tighter Worst-Case Execution-Time Analysis

Authors:

Amine Marref

Research group:

Programming Languages

Publication Type:

Conference/Workshop Paper

Venue:

Proceedings of the 11th IEEE International Conference on Embedded Computer Systems: Architectures, Modeling, and Simulation (SAMOS XI)

Publisher:

IEEE

Abstract

Obtaining tight worst-case execution-time (WCET) estimations of real-time tasks is crucial since overly-pessimistic estimations are deemed impractical. One way of making WCET estimations tighter is to incorporate more program-flow information e.g., context-sensitive loop bounds, infeasible-path and same-path information, etc.In this paper we present and evaluate a completely automatic analysis that dynamically derives program-flow information to use in WCET analysis. Flow information is derived by a combination of test-data generation and parsing of program-execution traces to obtain flow-fact hypotheses which are then fed to a model checker to establish their correctness. Experimental evaluation shows that our method help achieve considerable tightness in WCET estimations at a manageable cost.

Bibtex

@inproceedings{Marref2086,
author = {Amine Marref},
title = {Fully-Automatic Derivation of Exact Program-Flow Constraints for a Tighter Worst-Case Execution-Time Analysis},
month = {July},
year = {2011},
booktitle = {Proceedings of the 11th IEEE International Conference on Embedded Computer Systems: Architectures, Modeling, and Simulation (SAMOS XI)},
publisher = {IEEE},
url = {http://www.es.mdu.se/publications/2086-}
}