NDLI: A Framework to Construct Customized Harmonic Periods for Real-Time Systems

Content Provider	IEEE Xplore Digital Library
Author	Nasri, M. Fohler, G. Kargahi, M.
Copyright Year	2014
Description	Author affiliation: Sch. of Electr. & Comput. Eng., Univ. of Tehran, Tehran, Iran (Nasri, M.; Kargahi, M.) \|\| Dept. of Real-Time Syst., Tech. Univ. Kaiserslautern, Kaiserslautern, Germany (Fohler, G.)
Abstract	The periodic task model has been widely used in real-time systems due to the periodic behavior of many applications or periodic observation patterns of environmental events as in control applications. While the tasks of some applications have inherent values for periods, many can be defined via ranges of acceptable values. The designer choice of period values has consequences w.r.t. To utilization of the task set and the resulting hyper period. Harmonic task sets are favored, e.g., for their polynomial-time worst case response time analysis or their small hyper periods, which is of major concern e.g., for hyper visors used in virtualization or time triggered systems. In this paper we present a model to describe harmonic relations between ranges of period values, rather than single numbers only. We derive sufficient conditions for the existence of a linear-time solution, as well as a graph representation for the relations between period ranges. We provide utilization bounds of each resulting harmonic range, giving the designer flexibility to select a harmonic task set with high or low utilization. The tightness of the bounds as well as efficiency of our period assignment algorithms have been evaluated by synthetic experiments via system utilization and feasibly constructed harmonic task sets.
Starting Page	211
Ending Page	220
File Size	531908
Page Count	10
File Format	PDF
ISSN	10683070
e-ISBN	9781479957989
DOI	10.1109/ECRTS.2014.31
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-07-08
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Harmonic analysis Real-time systems Artificial intelligence Educational institutions Quality of service Computers Virtual machine monitors Utilization Bound Real-Time Systems Harmonic Period Period Range Period Assignment
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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