Title :
Performance Effect of Localized Thread Schedules in Heterogeneous Multi-Core Processors
Author_Institution :
UAE Univ., Al Ain
Abstract :
We previously proposed a heterogeneous 16-core architecture and a nearest neighbor priority-based thread scheduling algorithm which values core affinity and permits inter-core thread migration in [1]. In this paper, we run simulation experiments under localized core affinities limited to a very small number of specific cores within core classes. These localized schedules represent applications that are user- or system-confined to specific cores or their vicinity. They may also represent stressful scenarios with high contention to specific - and possibly scarce - cores with unique functionality or computational might. The results indicate that under these localized initial core affinity scenarios, non-migratory thread scheduling algorithms perform much worse than non-affinity algorithms while the algorithms which consider core affinity and allow inter-core thread migration are best.
Keywords :
multiprocessing systems; scheduling; core affinity; heterogeneous multi-core processors; intercore thread migration; localized thread schedules; thread scheduling algorithm; Computer architecture; Frequency; Multicore processing; Nearest neighbor searches; Operating systems; Processor scheduling; Radio access networks; Scheduling algorithm; Surface-mount technology; Yarn;
Conference_Titel :
Innovations in Information Technology, 2007. IIT '07. 4th International Conference on
Conference_Location :
Dubai
Print_ISBN :
978-1-4244-1840-4
Electronic_ISBN :
978-1-4244-1841-1
DOI :
10.1109/IIT.2007.4430377