Earliest-Deadline-First scheduling on nonpreemptive real-time threads for a continuous media server

  • Jong Moon Sohn
  • Gil Yong Kim
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1225)


The continuous-media application should use the real-time scheduling facility of the operating system to satisfy the time constraints. We consider the problem of non-preemptively scheduling periodic threads on a video server when the Earliest Deadline First(EDF) scheduling is used. When EDF scheduling is used for a set of periodic tasks, we can achieve high processor utilization. But the schedulability test is known to be an NP-hard problem.

This paper analyze the characteristics of video server threads, and proves that there is the sufficient condition for scheduling the threads by limiting the time constraints. The proposed sufficient condition performs the schedulability test within O(1) time complexity. We conclude by considering the applicability to the real-time scheduler.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Jong Moon Sohn
    • 1
  • Gil Yong Kim
    • 1
  1. 1.Department of Computer EngineeringPusan National UniversityPusanKorea

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