By Topic

Analysis and Optimization of a Queueing Model of a Real-Time Computer Control System

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)

A single processor provides service to jobs of several different priority classes. The priority ordering remains constant over time; however, the type of priority, i. e., preemptive or nonpreemptive, may depend upon the stage of processing of the job occupying the processor. We allow these preemptible and nonpreemptible intervals to be specified in a relatively arbitrary fashion. If a job is interrupted, a setup time must be incurred before processing can be continued on the job. If arrivals from all classes constitute independent Poisson streams, we are able to obtain expressions for the steady-state expected time in system for jobs of each class. These expressions are then analyzed to determine the optimum manner for assigning the preemptible and nonpreemptible intervals. When setup times are zero and preemptible portions are preemptive-resume, the optimal policy is fairly simple. When setup times are nonzero, the form of the optimal policy is not clear; however, numerical evaluations suggest that at high loads, e.g., greater than 0.9, one should allow much less preemption or time-sharing than one might suspect.

Published in:

Computers, IEEE Transactions on  (Volume:C-18 ,  Issue: 11 )