Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik GmbH Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik GmbH scholarly article en Dreyer, Boris; Hochberger, Christian; Wegener, Simon; Weiss, Alexander http://www.dagstuhl.de/oasics License
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URN: urn:nbn:de:0030-drops-52555
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Precise Continuous Non-Intrusive Measurement-Based Execution Time Estimation

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Abstract

Precise estimation of the Worst-Case Execution Time (WCET) of embedded software is a necessary precondition in safety critical systems. Static methods for WCET analysis rely on precise models of the target processorís micro-architecture. Measurement-based methods, in contrast, rely on exhaustive measurements performed on the real hardware. The rise of the multicore processors often renders staticWCET analysis infeasible, either due to the computational complexity or due the lack of necessary documentation. Current approaches for (hybrid) measurement-based WCET estimation process the trace data offline and thus need to store large amounts of data. In this contribution, we present a novel approach that performs continuous online aggregation of timing measurements. This enables long observation periods and increases the possibility to catch rare circumstances. Moreover, we incorporate the execution contexts of basic blocks. We can therefore account for typical cache behaviour, without being overly pessimistic.

BibTeX - Entry

@InProceedings{dreyer_et_al:OASIcs:2015:5255,
  author =	{Boris Dreyer and Christian Hochberger and Simon Wegener and Alexander Weiss},
  title =	{{Precise Continuous Non-Intrusive Measurement-Based Execution Time Estimation}},
  booktitle =	{15th International Workshop on Worst-Case Execution Time Analysis (WCET 2015)},
  pages =	{45--54},
  series =	{OpenAccess Series in Informatics (OASIcs)},
  ISBN =	{978-3-939897-95-8},
  ISSN =	{2190-6807},
  year =	{2015},
  volume =	{47},
  editor =	{Francisco J. Cazorla},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2015/5255},
  URN =		{urn:nbn:de:0030-drops-52555},
  doi =		{10.4230/OASIcs.WCET.2015.45},
  annote =	{Keywords: Hybrid Worst-Case Execution Time (WCET) Estimation for Multicore Processors, Real-time Systems}
}

Keywords: Hybrid Worst-Case Execution Time (WCET) Estimation for Multicore Processors, Real-time Systems
Seminar: 15th International Workshop on Worst-Case Execution Time Analysis (WCET 2015)
Issue date: 2015
Date of publication: 2015


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