000			03186nam a2200385 4500
005			20260817161522.0
008			270898 th eng
035			_a.b10068788
099		9	_aAIT Thesis no. CA-83-16
100	1		_aPerera, Bodiyabaduge Rohan Joseph
245	1	3	_aAn adaptive control system for the optimization of the interactive user response
260			_aBangkok : _bAsian Institute of Technology, _c1983
300			_aviii, 57 p.
490	1		_aThesis ; _vno. CA-83-16
500			_aA thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Engineering and Technology
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1983
520			_aThe study covers the analysis, design and evaluation of an adaptive control system for a computer installation. The control system optimizes an aggregate objective function, through the dynamic control of a chosen scheduling parameter. The initial investigation includes a study of individual and collective user behavior. The individual behavior determines the controllable objectives of the computer system, and the scheduling options available. Collective behavior determines the system performance under the proposed scheduling method. The control system extends the concepts of equality of service and of processor sharing to include the total cumulative CPU usage of individual customers. This is achieved by modifying the simple multi-class feedback scheduling algorithm to take into account the previous CPU usage . Users are assigned priorities according to their previous CPU usage. A closed form analytical expression for the waiting time of interactive users is developed using a simplified model of the computer system. The load variation is monitored and is used to adjust the parameters of the model. Using the updated model the scheduling parameter is dynamically adjusted to provide the optimal operating value. The control system is designed a s a collection of independent subsystems, interaction being achieved through the use of common data and parameter files. The basic assumptions are tested using a GPSS simulation model of the system.
650		0	_aAdaptive control systems _xMathematical models
700	0		_a Vilas Wuwongse, _eChairperson
700	1		_aMalik, Ghulam M., _eExamination Committee
700	1		_aHuynh, Ngoc Phien, _eExamination Committee
710	2		_aGovernment of Australia, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. CA-83-16
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B20955
907			_a.b10068788 _bmnait _cx
902			_a240718
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