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dc.contributor.authorBalli, Umuten_US
dc.date.accessioned2014-03-14T20:42:47Z
dc.date.available2014-03-14T20:42:47Z
dc.date.issued2005-07-28en_US
dc.identifier.otheretd-08052005-155355en_US
dc.identifier.urihttp://hdl.handle.net/10919/34358
dc.description.abstractWe present a utility accrual real-time scheduling algorithm called CIC-VCUA, for tasks whose execution times are functions of their starting times. We model such variable execution times employing variable cost functions (or VCFs). The algorithm considers application activities that are subject to time/utility function time constraints (or TUFs), execution times de- scribed using VCFs, and concurrent, mutually exclusive sharing of non-CPU resources. We consider the multi-criteria scheduling objective of (1) assuring that the maximum interval between any two consecutive, successful completions of jobs of a task must not exceed a specified upper bound, and (2) maximizing the system's total accrued utility, while satis- fying mutual exclusion resource constraints. Since the scheduling problem is intractable, CIC-VCUA statically computes worst-case sojourn times of tasks, selects tasks for execution based on their potential utility density, and completes them at specific times, in polynomial- time. We establish that CIC-VCUA achieves optimal timeliness during under-loads. Further, we identify the conditions under which timeliness assurances hold. Our simulation experi- ments illustrate CIC-VCUA's effectiveness and superiority.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartUmut_Balli_Thesis.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectutility accrual schedulingen_US
dc.subjectTime/utility functionsen_US
dc.subjectVariable Cost Functionsen_US
dc.titleUtility Accrual Real-Time Scheduling Under Variable Cost Functionsen_US
dc.typeThesisen_US
dc.contributor.departmentElectrical and Computer Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineElectrical and Computer Engineeringen_US
dc.contributor.committeechairRavindran, Binoyen_US
dc.contributor.committeememberHou, Yiwei Thomasen_US
dc.contributor.committeememberMishra, Amitabhen_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08052005-155355/en_US
dc.date.sdate2005-08-05en_US
dc.date.rdate2008-08-15
dc.date.adate2005-08-15en_US


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