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Expressing and Exploiting Conflicts over Paths in WCET Analysis

Authors Vincent Mussot, Jordy Ruiz, Pascal Sotin, Marianne de Michiel, Hugues Cassé



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Vincent Mussot
Jordy Ruiz
Pascal Sotin
Marianne de Michiel
Hugues Cassé

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Vincent Mussot, Jordy Ruiz, Pascal Sotin, Marianne de Michiel, and Hugues Cassé. Expressing and Exploiting Conflicts over Paths in WCET Analysis. In 16th International Workshop on Worst-Case Execution Time Analysis (WCET 2016). Open Access Series in Informatics (OASIcs), Volume 55, pp. 3:1-3:11, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2016)
https://doi.org/10.4230/OASIcs.WCET.2016.3

Abstract

The presence of infeasible paths in a program is a source of imprecision in the Worst-Case Execution Time (WCET) analysis. Detecting, expressing and exploiting such paths can improve the WCET estimation or, at least, improve the confidence we have in estimation precision. In this article, we propose an extension of the FFX format to express conflicts over paths and we detail two ways of enhancing the WCET analyses with that information. We demonstrate and compare these techniques on the Mälardalen benchmark suite and on C code generated from Esterel.
Keywords
  • WCET analysis
  • Infeasible paths
  • Path conflicts
  • IPET
  • CFG transformation

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References

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