Middleware Support for Aperiodic Tasks in Distributed Real-Time Systems

  • Authors:
  • Yuanfang Zhang;Chenyang Lu;Christopher Gill;Patrick Lardieri;Gautam Thaker

  • Affiliations:
  • Washington University, USA;Washington University, USA;Washington University, USA;Lockheed Martin, USA;Lockheed Martin, USA

  • Venue:
  • RTAS '07 Proceedings of the 13th IEEE Real Time and Embedded Technology and Applications Symposium
  • Year:
  • 2007

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Abstract

Many mission-critical distributed real-time applications must handle aperiodic tasks with end-to-end deadlines. However, existing middleware (e.g., RT-CORBA) lacks schedulability analysis and run-time enforcement mechanisms needed to give online real-time guarantees for aperiodic tasks. The primary contribution of this work is the design, implementation, and performance evaluation of the first realization of deferrable server and admission control mechanisms for aperiodic tasks in middleware. Empirical results on a KURT-Linux testbed demonstrate the efficiency and effectiveness of our deferrable server and admission control mechanisms in TAO's federated event service.