Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik GmbH Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik GmbH scholarly article en Keim, Paul; Noyes, Amanda; Ferguson, Andrew; Neal, Joshua; Healy, Christopher http://www.dagstuhl.de/oasics License
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URN: urn:nbn:de:0030-drops-22922
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Extending the Path Analysis Technique to Obtain a Soft WCET

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Abstract

This paper discusses an efficient approach to statically compute a WCET that is "soft" rather than "hard". The goal of most timing analysis is to determine a guaranteed WCET; however this execution time may be far above the actual distribution of observed execution times. A WCET estimate that bounds the execution time 99% of the time may be more useful for a designer in a soft real-time environment. This paper discusses an approach to measure the execution time distribution by a hardware simulator, and a path-based timing analysis approach to derive a static estimation of this same distribution. The technique can find a soft WCET for loops having any number of paths.

BibTeX - Entry

@InProceedings{keim_et_al:OASIcs:2009:2292,
  author =	{Paul Keim and Amanda Noyes and Andrew Ferguson and Joshua Neal and Christopher Healy},
  title =	{{Extending the Path Analysis Technique to Obtain a Soft WCET}},
  booktitle =	{9th International Workshop on Worst-Case Execution Time Analysis (WCET'09) },
  pages =	{1--9},
  series =	{OpenAccess Series in Informatics (OASIcs)},
  ISBN =	{978-3-939897-14-9},
  ISSN =	{2190-6807},
  year =	{2009},
  volume =	{10},
  editor =	{Niklas Holsti},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2009/2292},
  URN =		{urn:nbn:de:0030-drops-22922},
  doi =		{http://dx.doi.org/10.4230/OASIcs.WCET.2009.2292},
  note =	{also published in print by Austrian Computer Society (OCG) with ISBN 978-3-85403-252-6},
  annote =	{Keywords: WCET analysis, soft real-time, path-based, distribution}
}

Keywords: WCET analysis, soft real-time, path-based, distribution
Seminar: 9th International Workshop on Worst-Case Execution Time Analysis (WCET'09)
Issue date: 2009
Date of publication: 2009


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