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Improving Energy-Efficiency of Static Schedules by Core Consolidation and Switching Off Unused Cores
Linköping University, Department of Computer and Information Science, Software and Systems. (PELAB)ORCID iD: 0000-0002-1940-3331
Linköping University, Department of Computer and Information Science, Software and Systems. Linköping University, Faculty of Science & Engineering. (PELAB)ORCID iD: 0000-0001-5241-0026
FernUniversität in Hagen, Germany. (Parallelität und VLSI)
2016 (English)In: Parallel Computing: On the Road to Exascale / [ed] Gerhard R. Joubert, Hugh Leather, Mark Parsons, Frans Peters, Mark Sawyer, IOS Press, 2016, p. 285-294Chapter in book (Refereed)
Abstract [en]

We demonstrate how static, energy-efficient schedules for independent, parallelizable tasks on parallel machines can be improved by modeling idle power if the static power consumption of a core comprises a notable fraction of the core's total power, which more and more often is the case. The improvement is achieved by optimally packing cores when deciding about core allocation, mapping and DVFS for each task so that all unused cores can be switched off and overall energy usage is minimized. We evaluate our proposal with a benchmark suite of task collections, and compare the resulting schedules with an optimal scheduler that does however not take idle power and core switch-off into account. We find that we can reduce energy consumption by 66% for mostly sequential tasks on many cores and by up to 91% for a realistic multicore processor model.

Place, publisher, year, edition, pages
IOS Press, 2016. p. 285-294
Series
Advances in parallel computing ; 27
Keywords [en]
parallel computing, energy optimization, core allocation, DVFS, DPM, multicore, many-core computing, energy-optimal scheduling, task graph mapping, integer linear programming
National Category
Computer Sciences
Identifiers
URN: urn:nbn:se:liu:diva-145203DOI: 10.3233/978-1-61499-621-7-285ISBN: 9781614996200 (print)ISBN: 9781614996217 (electronic)OAI: oai:DiVA.org:liu-145203DiVA, id: diva2:1183182
Projects
EU FP7 EXCESSSeRC PSDE
Funder
EU, FP7, Seventh Framework Programme, 611183Swedish e‐Science Research Center, PSDE
Note

Post-conference proceedings of ParCo-2015 conference, Edinburgh, UK, 1-4 september 2015

Available from: 2018-02-15 Created: 2018-02-15 Last updated: 2018-02-21Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf