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Hierarchical Scheduling Framework for Virtual Clustering of Multiprocessors

Hierarchical Scheduling Framework for Virtual Clustering of Multiprocessors,10.1109/ECRTS.2008.28,Insik Shin,Arvind Easwaran,Insup Lee

Hierarchical Scheduling Framework for Virtual Clustering of Multiprocessors   (Citations: 43)
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Scheduling of sporadic task systems on multiprocessor platforms is an area which has received much attention in the recent past. It is widely believed that finding an optimal scheduler is hard, and therefore most studies have focused on developing algorithms with good utilization bounds. These algorithms can be broadly classified into two categories: partitioned scheduling in which tasks are statically assigned to individual processors, and global scheduling in which each task is allowed to execute on any processor in the plat- form. In this paper we consider a third, more general, ap- proach called cluster-based scheduling. In this approach each task is statically assigned to a processor cluster, tasks in each cluster are globally scheduled among themselves, and clusters in turn are scheduled on the multiprocessor plat- form. We develop techniques to support such cluster-based scheduling algorithms, and also consider properties that minimize processor utilization of individual clusters. Since neither partitioned nor global strategies dominate over the other, cluster-based scheduling is a natural direction for re- search towards achieving improved utilization bounds.
Conference: Euromicro Conference on Real-Time Systems - ECRTS , pp. 181-190, 2008
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