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A soft real time scheduling server in UNIX operating system

  • Hao-hua Chu
  • Klara Nahrstedt
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1309)

Abstract

We present a soft real-time CPU server for Continuous Media processing in the UNIX environment. The server is a daemon process from which applications can request and acquire soft real-time QoS (Quality of Service) Guarantees. Our server architecture addresses in addition to other multimedia CPU scheduling extensions properties such as fairness, QoS brokerage and enforcement, and security. Overall it provides (1) protection among real-time(RT) processes, (2) fairness among RT and non-RT processes, (3) rate monotonic scheduling, and (4) a fix to the UNIX security problem. We have implemented our soft real-time CPU server in the SUN Solaris 2.5 Operating System, and we have shown through experiments that our soft RT server provides predictable QoS for continuous media applications.

Keywords

Server Architecture Schedulability Test Page Fault Dynamic Priority UNIX Environment 
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References

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Hao-hua Chu
    • 1
  • Klara Nahrstedt
    • 1
  1. 1.University of Illinois at Urbana ChampaignUrbanaUSA

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