NDLI: Multiprocessors scheduling for imprecise computations in a hard real-time environment

Content Provider	IEEE Xplore Digital Library
Author	Khemka, A. Shyamasundar, R.K. Subrahmanyam, K.V.
Copyright Year	1993
Description	Author affiliation: Tata Inst. of Fundamental Res., Bombay, India (Khemka, A.; Shyamasundar, R.K.; Subrahmanyam, K.V.)
Abstract	This paper discusses the problem of scheduling multiprocessors in a hard real-time environment allowing imprecise computations. The computation of tasks can be divided into mandatory and optional parts; In a feasible schedule, the mandatory part of every task has to be completed before the deadline of the task. The optional part refines the result produced by the mandatory part to reduce the error in the result. The optional parts need not ever be completed. The quality of the result of each job is measured in terms of the average error in the results over several consecutive periods. Thus, given n real-time periodic jobs which has a periodicity and a processing requirement per period, the problem of determining whether there exists a preemptive schedule on m identical or uniform machines which completes the mandatory portion of each job in the time interval in a period is examined. A combination of network flow techniques and convex programming formulation is used to construct a minimum error schedule whenever there exists a feasible schedule. The error produced due to the uncomputed portions of tasks is assumed to be some real-valued convex function of the uncomputed portions.
Starting Page	374
Ending Page	378
File Size	452743
Page Count	5
File Format	PDF
ISBN	0818634421
DOI	10.1109/IPPS.1993.262909
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1993-04-13
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Processor scheduling Real time systems Timing Refining Formal specifications Computer science Runtime Computational modeling
Content Type	Text
Resource Type	Article

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