Symbolic state traversal for WCET analysis

  • Authors:
  • Stephan Wilhelm;Björn Wachter

  • Affiliations:
  • AbsInt GmbH, Saarbrücken, Germany;Saarland University, Saarbrücken, Germany

  • Venue:
  • EMSOFT '09 Proceedings of the seventh ACM international conference on Embedded software
  • Year:
  • 2009

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Abstract

Static worst-case execution time analysis of real-time tasks is based on abstract models that capture the timing behavior of the processor on which the tasks run. For complex processors, task-level execution time bounds are obtained by a state exploration which involves the abstract model and the program. Partial state space exploration is not sound. A full exploration can become too expensive. We present a novel symbolic method for WCET analysis based on abstract pipeline models which produces sound results and is scalable in terms of the considered hardware states.