NDLI: An adaptive loop scheduling algorithm on shared-memory systems

Content Provider	IEEE Xplore Digital Library
Author	Canming Jin Yong Yan Xiaodong Zhang
Copyright Year	1996
Description	Author affiliation: CSO Project, San Antonio, TX, USA (Canming Jin)
Abstract	Using runtime information of load distributions and processor affinity, we propose an adaptive scheduling algorithm and its variations from different control mechanisms. The proposed algorithm applies different degrees of aggressiveness to adjust loop scheduling granularities, aiming at improving the execution performance of parallel loops by making scheduling decisions that match the real workload distributions at runtime. To verify the effectiveness of the algorithm and its variations, we implemented them on the KSR-1 and on the Convex Exemplar. We experimentally compared the performance of our algorithm and its variations with several existing scheduling algorithms on the two machines. The kernel application programs we used for performance evaluation were carefully selected for different classes of parallel loops. Our results show that using runtime information to adaptively adjust scheduling granularity is an effective way to handle loops with a wide range of load distributions when no prior knowledge of the execution can be used. The overhead caused by collecting runtime information is insignificant in comparison with the performance improvement. Our experiments show that the adaptive algorithm and its five variations outperformed the existing scheduling algorithms.
Starting Page	250
Ending Page	257
File Size	933328
Page Count	8
File Format	PDF
ISBN	0818676833
DOI	10.1109/SPDP.1996.570341
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-10-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Scheduling algorithm Runtime Processor scheduling High performance computing Software performance Laboratories Adaptive scheduling Software algorithms Kernel Data communication
Content Type	Text
Resource Type	Article

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