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Documents authored by Loidl, Hans-Wolfgang

Document
DOI: 10.4230/OASIcs.WCET.2007.1186
Automatic Amortised Worst-Case Execution Time Analysis

Authors: Christoph A. Herrmann, Armelle Bonenfant, Kevin Hammond, Steffen Jost, Hans-Wolfgang Loidl, and Robert Pointon

Published in: OASIcs, Volume 6, 7th International Workshop on Worst-Case Execution Time Analysis (WCET'07) (2007)

Abstract
Our research focuses on formally bounded WCET analysis, where we aim to provide absolute guarantees on execution time bounds. In this paper, we describe how amortisation can be used to improve the quality of the results that are obtained from a fully-automatic and formally guaranteed WCET analysis, by delivering analysis results that are parameterised on specific input patterns and which take account of relations between these patterns. We have implemented our approach to give a tool that is capable of predicting execution costs for a typical embedded system development platform, a Renesas board with a Renesas M32C/85U processor. We show that not only is the amortised approach applicable in theory, but that it can be applied automatically to yield good WCET results.
Cite as

Christoph A. Herrmann, Armelle Bonenfant, Kevin Hammond, Steffen Jost, Hans-Wolfgang Loidl, and Robert Pointon. Automatic Amortised Worst-Case Execution Time Analysis. In 7th International Workshop on Worst-Case Execution Time Analysis (WCET'07). Open Access Series in Informatics (OASIcs), Volume 6, pp. 1-6, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2007)

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@InProceedings{herrmann_et_al:OASIcs.WCET.2007.1186,
  author =	{Herrmann, Christoph A. and Bonenfant, Armelle and Hammond, Kevin and Jost, Steffen and Loidl, Hans-Wolfgang and Pointon, Robert},
  title =	{{Automatic Amortised Worst-Case Execution Time Analysis}},
  booktitle =	{7th International Workshop on Worst-Case Execution Time Analysis (WCET'07)},
  pages =	{1--6},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-939897-05-7},
  ISSN =	{2190-6807},
  year =	{2007},
  volume =	{6},
  editor =	{Rochange, Christine},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.WCET.2007.1186},
  URN =		{urn:nbn:de:0030-drops-11868},
  doi =		{10.4230/OASIcs.WCET.2007.1186},
  annote =	{Keywords: Amortisation, functional programming, performance measurement, static analysis, type and effect systems, worst-case execution time}
}
Document
DOI: 10.4230/OASIcs.WCET.2006.677
Towards Formally Verifiable WCET Analysis for a Functional Programming Language

Authors: Kevin Hammond, Christian Ferdinand, Reinhold Heckmann, Roy Dyckhoff, Martin Hofman, Steffen Jost, Hans-Wolfgang Loidl, Greg Michaelson, Robert Pointon, Norman Scaife, Jocelyn Sérot, and Andy Wallace

Published in: OASIcs, Volume 4, 6th International Workshop on Worst-Case Execution Time Analysis (WCET'06) (2006)

Abstract
This paper describes ongoing work aimed at the construction of formal cost models and analyses to yield verifiable guarantees of resource usage in the context of real-time embedded systems. Our work is conducted in terms of the domain-specific language Hume, a language that combines functional programming for computations with finitestate automata for specifying reactive systems. We outline an approach in which high-level information derived from source-code analysis can be combined with worst-case execution time information obtained from high quality abstract interpretation of low-level binary code.
Cite as

Kevin Hammond, Christian Ferdinand, Reinhold Heckmann, Roy Dyckhoff, Martin Hofman, Steffen Jost, Hans-Wolfgang Loidl, Greg Michaelson, Robert Pointon, Norman Scaife, Jocelyn Sérot, and Andy Wallace. Towards Formally Verifiable WCET Analysis for a Functional Programming Language. In 6th International Workshop on Worst-Case Execution Time Analysis (WCET'06). Open Access Series in Informatics (OASIcs), Volume 4, pp. 1-6, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2006)

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@InProceedings{hammond_et_al:OASIcs.WCET.2006.677,
  author =	{Hammond, Kevin and Ferdinand, Christian and Heckmann, Reinhold and Dyckhoff, Roy and Hofman, Martin and Jost, Steffen and Loidl, Hans-Wolfgang and Michaelson, Greg and Pointon, Robert and Scaife, Norman and S\'{e}rot, Jocelyn and Wallace, Andy},
  title =	{{Towards Formally Verifiable WCET Analysis for a Functional Programming Language}},
  booktitle =	{6th International Workshop on Worst-Case Execution Time Analysis (WCET'06)},
  pages =	{1--6},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-939897-03-3},
  ISSN =	{2190-6807},
  year =	{2006},
  volume =	{4},
  editor =	{Mueller, Frank},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.WCET.2006.677},
  URN =		{urn:nbn:de:0030-drops-6773},
  doi =		{10.4230/OASIcs.WCET.2006.677},
  annote =	{Keywords: Worst-case execution time, functional programming, Hume, cost model, asynchronous, finite state machine}
}
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