Title

Schedulability Analysis of Non-Preemptive Strictly Periodic Tasks in Multi-Core Real-Time Systems

Published In

Real-Time Systems

Document Type

Citation

Publication Date

5-1-2016

Abstract

Non-preemptive tasks with strict periods are usually adopted in practical real-time systems where missing deadlines may lead to catastrophic situations. Their schedulability analysis plays a crucial role in guiding the design and development of such real-time systems. In this paper, we study the schedulability analysis problem of partitioned non-preemptive scheduling for strictly periodic tasks on multiprocessors. We propose a set of schedulability conditions, which determines whether a new task can be scheduled on a processor without changing the offsets of the existing tasks and identifies all valid start time offsets for the new task if it is schedulable. Based on these conditions, we present a task assignment algorithm, which is not optimal, but provides an upper bound on the number of cores required by a periodic task set. We illustrate this algorithm with a practical example and conduct stimulation experiments with randomly generated task sets to evaluate the performance of our approach from several aspects.

DOI

10.1007/s11241-015-9226-z

Persistent Identifier

http://archives.pdx.edu/ds/psu/19005

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