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DOI: 10.4230/OASIcs.WCET.2015.75

Bare-Metal Execution of Hard Real-Time Tasks Within a General-Purpose Operating System

Authors: Georg Wassen and Stefan Lankes

Published in: OASIcs, Volume 47, 15th International Workshop on Worst-Case Execution Time Analysis (WCET 2015)

Abstract

Integrating high performance and real-time demands on multi-processor systems is a challenging task. We present our concept of isolating processes from a general-purpose operating system without deeply invading modifications. This allows executing code on dedicated CPUs with minimum latency and jitter like bare-metal on micro-controllers. The unbounded execution of mixed critical processes on the same system induces performance interference in real-time tasks. We present the implementation of isolated partitions on multi-processor x86 systems running Linux and describe challenges restoring operating system stability. This work also presents our experience with Non-Uniform Memory Access architectures that allow to partition the system in a way that the impact to memory and I/O transfers of other partitions is minimized.

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Georg Wassen and Stefan Lankes. Bare-Metal Execution of Hard Real-Time Tasks Within a General-Purpose Operating System. In 15th International Workshop on Worst-Case Execution Time Analysis (WCET 2015). Open Access Series in Informatics (OASIcs), Volume 47, pp. 75-84, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2015)

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@InProceedings{wassen_et_al:OASIcs.WCET.2015.75,
  author =	{Wassen, Georg and Lankes, Stefan},
  title =	{{Bare-Metal Execution of Hard Real-Time Tasks Within a General-Purpose Operating System}},
  booktitle =	{15th International Workshop on Worst-Case Execution Time Analysis (WCET 2015)},
  pages =	{75--84},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-939897-95-8},
  ISSN =	{2190-6807},
  year =	{2015},
  volume =	{47},
  editor =	{Cazorla, Francisco J.},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.WCET.2015.75},
  URN =		{urn:nbn:de:0030-drops-52584},
  doi =		{10.4230/OASIcs.WCET.2015.75},
  annote =	{Keywords: Hard Real-Time System, High-Performance Computing, Non-uniform Memory Access, Bare-Metal Execution}
}

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Bare-Metal Execution of Hard Real-Time Tasks Within a General-Purpose Operating System

Abstract

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