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DOI: 10.4230/OASIcs.WCET.2018.7

Experimental Evaluation of Cache-Related Preemption Delay Aware Timing Analysis

Authors: Darshit Shah, Sebastian Hahn, and Jan Reineke

Published in: OASIcs, Volume 63, 18th International Workshop on Worst-Case Execution Time Analysis (WCET 2018)

Abstract

In the presence of caches, preemptive scheduling may incur a significant overhead referred to as cache-related preemption delay (CRPD). CRPD is caused by preempting tasks evicting cached memory blocks of preempted tasks, which have to be reloaded when the preempted tasks resume their execution. In this paper we experimentally evaluate state-of-the-art techniques to account for the CRPD during timing analysis. We find that purely synthetically-generated task sets may yield misleading conclusions regarding the relative precision of different CRPD analysis techniques and the impact of CRPD on schedulability in general. Based on task characterizations obtained by static worst-case execution time (WCET) analysis, we shed new light on the state of the art.

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Darshit Shah, Sebastian Hahn, and Jan Reineke. Experimental Evaluation of Cache-Related Preemption Delay Aware Timing Analysis. In 18th International Workshop on Worst-Case Execution Time Analysis (WCET 2018). Open Access Series in Informatics (OASIcs), Volume 63, pp. 7:1-7:11, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)

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@InProceedings{shah_et_al:OASIcs.WCET.2018.7,
  author =	{Shah, Darshit and Hahn, Sebastian and Reineke, Jan},
  title =	{{Experimental Evaluation of Cache-Related Preemption Delay Aware Timing Analysis}},
  booktitle =	{18th International Workshop on Worst-Case Execution Time Analysis (WCET 2018)},
  pages =	{7:1--7:11},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-073-6},
  ISSN =	{2190-6807},
  year =	{2018},
  volume =	{63},
  editor =	{Brandner, Florian},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.WCET.2018.7},
  URN =		{urn:nbn:de:0030-drops-97532},
  doi =		{10.4230/OASIcs.WCET.2018.7},
  annote =	{Keywords: real-time systems, timing analysis, cache-related preemption delay}
}

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Experimental Evaluation of Cache-Related Preemption Delay Aware Timing Analysis

Abstract

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