NDLI: Deadline assignment in distributed hard real-time systems with relaxed locality constraints

Content Provider	IEEE Xplore Digital Library
Author	Jonsson, J. Shin, K.G.
Copyright Year	1997
Description	Author affiliation: Dept. of Comput. Eng., Chalmers Univ. of Technol., Goteborg, Sweden (Jonsson, J.)
Abstract	In a real time system, tasks are constrained by global end to end deadlines. In order to cater for high task schedulability, these deadlines must be distributed over component subtasks in an intelligent way. Existing methods for automatic distribution of end to end deadlines are all based on the assumption that task assignments are entirely known beforehand. This assumption is not necessarily valid for large real time systems. Furthermore, most task assignment strategies require information on deadlines in order to make good assignments, thus forming a circular dependency between deadline distribution and task assignment. We present a heuristic approach that performs deadline distribution prior to task assignment. The deadline distribution problem is presented in the context of large distributed hard real time systems with relaxed locality constraints, where schedulability analysis must be performed offline, and only a subset of the tasks are constrained by predetermined assignments to specific processors. Using experimental results we identify drawbacks of previously proposed techniques, and then show that our solution provides significantly better performance for a large variety of system configurations.
Starting Page	432
Ending Page	440
File Size	1046142
Page Count	9
File Format	PDF
ISBN	0818678135
ISSN	10636927
DOI	10.1109/ICDCS.1997.598077
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-05-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Real time systems Processor scheduling Computer science Software maintenance Performance analysis Distributed computing Application software Software reusability Parallel processing Sensor systems
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software

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