Feasibility Analysis Under Fixed Priority Scheduling with Fixed Preemption Points

Limited preemption models have been proposed as a viable alternative between the two extreme cases of fully preemptive and non-preemptive scheduling. In particular, allowing preemption to occur only at predefined preemption points reduces context switch costs, simplifies the access to shared resources, and allows more predictable estimations of worst-case execution times. Current results related to such a model, however, exhibit two major deficiencies: the exact response time analysis is too complex and the maximum lengths of the non-preemptive regions for each task are still unknown.

Provided by: University of Missouri-St. Louis Topic: Hardware Date Added: May 2009 Format: PDF

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