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Dynamic scheduling of real-time tasks, by assignment

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2 Author(s)
Hamidzadeb, B. ; Dept. of Electr. & Comput. Eng., British Columbia Univ., Vancouver, BC, Canada ; Atif, Y.

Sequencing and assignment are two important issues we need to address a when scheduling real-time tasks on a multiprocessor architecture. Different problem representations can schedule such tasks, each emphasizing either a sequencing or assignment task. A sequence-oriented representation satisfies problem constraints by emphasizing the search for an appropriate tasks order, while an assignment-oriented representation emphasizes the search for an appropriate assignment of tasks. The authors introduce the RT-SAD algorithm, which uses an assignment-oriented representation to dynamically schedule tasks on the processors of a NUMA architecture. The proposed technique automatically controls and allocates the scheduling time to minimize the scheduling overhead and deadline violation of real-time tasks. The authors compare RT-SADS performance with another dynamic algorithm that uses a sequence-oriented representation. The results show interesting performance trade-offs among the candidate algorithms

Published in:

Concurrency, IEEE  (Volume:6 ,  Issue: 4 )