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DOI: 10.4230/LIPIcs.ECRTS.2019.15
URN: urn:nbn:de:0030-drops-107521
URL: https://drops.dagstuhl.de/opus/volltexte/2019/10752/
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Tessler, Corey ; Fisher, Nathan

NPM-BUNDLE: Non-Preemptive Multitask Scheduling for Jobs with BUNDLE-Based Thread-Level Scheduling

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LIPIcs-ECRTS-2019-15.pdf (0.9 MB)


Abstract

The BUNDLE and BUNDLEP scheduling algorithms are cache-cognizant thread-level scheduling algorithms and associated worst case execution time and cache overhead (WCETO) techniques for hard real-time multi-threaded tasks. The BUNDLE-based approaches utilize the inter-thread cache benefit to reduce WCETO values for jobs. Currently, the BUNDLE-based approaches are limited to scheduling a single task. This work aims to expand the applicability of BUNDLE-based scheduling to multiple task multi-threaded task sets. BUNDLE-based scheduling leverages knowledge of potential cache conflicts to selectively preempt one thread in favor of another from the same job. This thread-level preemption is a requirement for the run-time behavior and WCETO calculation to receive the benefit of BUNDLE-based approaches. This work proposes scheduling BUNDLE-based jobs non-preemptively according to the earliest deadline first (EDF) policy. Jobs are forbidden from preempting one another, while threads within a job are allowed to preempt other threads. An accompanying schedulability test is provided, named Threads Per Job (TPJ). TPJ is a novel schedulability test, input is a task set specification which may be transformed (under certain restrictions); dividing threads among tasks in an effort to find a feasible task set. Enhanced by the flexibility to transform task sets and taking advantage of the inter-thread cache benefit, the evaluation shows TPJ scheduling task sets fully preemptive EDF cannot.

BibTeX - Entry

@InProceedings{tessler_et_al:LIPIcs:2019:10752,
  author =	{Corey Tessler and Nathan Fisher},
  title =	{{NPM-BUNDLE: Non-Preemptive Multitask Scheduling for Jobs with BUNDLE-Based Thread-Level Scheduling}},
  booktitle =	{31st Euromicro Conference on Real-Time Systems (ECRTS 2019)},
  pages =	{15:1--15:23},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-110-8},
  ISSN =	{1868-8969},
  year =	{2019},
  volume =	{133},
  editor =	{Sophie Quinton},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2019/10752},
  URN =		{urn:nbn:de:0030-drops-107521},
  doi =		{10.4230/LIPIcs.ECRTS.2019.15},
  annote =	{Keywords: Scheduling algorithms, Cache Memory, Multi-threading, Static Analysis}
}

Keywords: Scheduling algorithms, Cache Memory, Multi-threading, Static Analysis
Seminar: 31st Euromicro Conference on Real-Time Systems (ECRTS 2019)
Issue Date: 2019
Date of publication: 08.07.2019


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