Portioned EDF-based scheduling on multiprocessors

Shinpei Kato, Nobuyuki Yamasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

49 Citations (Scopus)

Abstract

This paper presents an EDF-based algorithm, called Earliest Deadline Deferrable Portion (EDDP), for efficient scheduling of recurrent real-time tasks on multiprocessor systems. The design of EDDP is based on the portioned scheduling technique which classifies each task into a fixed task or a migratable task. A fixed task is scheduled on the dedicated processor without migrations. A migratable task is meanwhile permitted to migrate between the particular two processors. In order to curb the cost of task migrations, EDDP makes at most M - 1 migratable tasks on M processors. The scheduling analysis derives the condition for a given task set to be schedulable. It is also proven that no tasks ever miss deadlines, if the system utilization does not exceed 65%. Beyond the theoretical analysis, the effectiveness of EDDP is evaluated through simulation studies. Simulation results show that EDDP achieves high system utilization with a small number of preemptions, compared with the traditional EDF-based algorithms.

Original languageEnglish
Title of host publicationProceedings of the 8th ACM International Conference on Embedded Software, EMSOFT'08
PublisherAssociation for Computing Machinery (ACM)
Pages139-148
Number of pages10
ISBN (Print)9781605584683
DOIs
Publication statusPublished - 2008
Event8th ACM International Conference on Embedded Software, EMSOFT 2008 - Atlanta, GA, United States
Duration: 2008 Oct 192008 Oct 24

Publication series

NameProceedings of the 8th ACM International Conference on Embedded Software, EMSOFT'08

Other

Other8th ACM International Conference on Embedded Software, EMSOFT 2008
Country/TerritoryUnited States
CityAtlanta, GA
Period08/10/1908/10/24

Keywords

  • Multiprocessor systems
  • Real-time systems
  • Scheduling algorithm

ASJC Scopus subject areas

  • Software

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