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When quoting this document, please refer to the following
DOI: 10.4230/OASIcs.WCET.2012.48
URN: urn:nbn:de:0030-drops-35565
URL: http://dagstuhl.sunsite.rwth-aachen.de/volltexte/2012/3556/
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Lisper, Björn

Towards Parallel Programming Models for Predictability

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p048-lisper.pdf (0.3 MB)

Abstract

Future embedded systems for performance-demanding applications will be massively parallel. High performance tasks will be parallel programs, running on several cores, rather than single threads running on single cores. For hard real-time applications, WCETs for such tasks must be bounded. Low-level parallel programming models, based on concurrent threads, are notoriously hard to use due to their inherent nondeterminism. Therefore the parallel processing community
has long considered high-level parallel programming models, which restrict the low-level models to regain determinism. In this position paper we argue that such parallel programming models are beneficial also for WCET analysis of parallel programs. We review some proposed models, and discuss their influence on timing predictability. In particular we identify data parallel programming as a suitable paradigm as it is deterministic and allows current methods for WCET
analysis to be extended to parallel code. GPUs are increasingly used for high performance applications: we discuss a current GPU architecture, and we argue that it offers a parallel platform
for compute-intensive applications for which it seems possible to construct precise timing models. Thus, a promising route for the future is to develop WCET analyses for data-parallel software running on GPUs.

BibTeX - Entry

@InProceedings{lisper:OASIcs:2012:3556,
  author =	{Bj{\"o}rn Lisper},
  title =	{{Towards Parallel Programming Models for Predictability}},
  booktitle =	{12th International Workshop on Worst-Case Execution Time Analysis},
  pages =	{48--58},
  series =	{OpenAccess Series in Informatics (OASIcs)},
  ISBN =	{978-3-939897-41-5},
  ISSN =	{2190-6807},
  year =	{2012},
  volume =	{23},
  editor =	{Tullio Vardanega},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2012/3556},
  URN =		{urn:nbn:de:0030-drops-35565},
  doi =		{10.4230/OASIcs.WCET.2012.48},
  annote =	{Keywords: Real-Time System, WCET analysis, Parallel Program, Data Parallelism}
}

Keywords: Real-Time System, WCET analysis, Parallel Program, Data Parallelism
Collection: 12th International Workshop on Worst-Case Execution Time Analysis
Issue Date: 2012
Date of publication: 10.07.2012

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