This Article 
 Bibliographic References 
 Add to: 
A Queuing Model of a Time-Sliced Priority-Driven Task Dispatching Algorithm
March 1980 (vol. 6 no. 2)
pp. 219-225
P.S. Kritzinger, Department of Computer Science, University of Stellenbosch
A queuing analysis of a preemptive, priority-driven, time-sliced dispatcher algorithm, typical of those found in many time-sharing systems, is presented. A distinctive feature of the system being modeled is that a preempted task, when readmitted to the dispatcher, is reallocated a full time slice rather than the residual. The combination of preemption, time-slice renewal and class-dependent arrival and service rates places the analysis beyond that of the well-known FBN algorithms. The model is used to predict the behavior of the dispatcher algorithm under various workloads. The model reveals that, at high arrival rates, the time-slice renewal policy prevents processor bound tasks from being relegated to the lower priority queues, thereby severely degrading the throughput of tasks with short processor requirements.
Index Terms:
time slicing, Computer performance modeling, dispatcher algorithms, multilevel feedback queue, priority preemption
P.S. Kritzinger, A.E. Krzesinski, P. Teunissen, "A Queuing Model of a Time-Sliced Priority-Driven Task Dispatching Algorithm," IEEE Transactions on Software Engineering, vol. 6, no. 2, pp. 219-225, March 1980, doi:10.1109/TSE.1980.230472
Usage of this product signifies your acceptance of the Terms of Use.