University of Hertfordshire

By the same authors

A Uniform Model for Tolerance-Based Real-Time Computing

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

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Original languageEnglish
Title of host publicationProceedings - IEEE 17th International Symposium on Object/Component/Service-Oriented Real-Time Distributed Computing, ISORC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages9-16
Number of pages8
ISBN (Print)9781479944309
DOIs
Publication statusPublished - 15 Sep 2014
Event17th IEEE International Symposium on Object/Component/Service-Oriented Real-Time Distributed Computing, ISORC 2014 - Reno, United States
Duration: 9 Jun 201412 Jun 2014

Conference

Conference17th IEEE International Symposium on Object/Component/Service-Oriented Real-Time Distributed Computing, ISORC 2014
CountryUnited States
CityReno
Period9/06/1412/06/14

Abstract

Standard real-time models do not consider the fact that a chosen technical deadline is different from the critical latency where the service utility becomes zero. This is in mismatch with engineering practice. In this paper we propose a tolerance-based refinement of the real-time model. By doing so we make the process of deriving the estimation of the critical latency explicit. The difference between the technical deadline and the critical latency is a measure for the safety margin of the system. This safety margin is important for both, soft real-time and hard real-time systems, though with different quantities and qualities. Furthermore, we explain why the critical latency can hardly be quantified by a concrete value. However, we demonstrate how to derive reasonable estimates for it. We use a concrete application to show how the distinctive knowledge of the critical latency and the technical deadline are useful for real-time scheduling.

ID: 9428861