NDLI: Reducing Shared Cache Contention by Scheduling Order Adjustment on Commodity Multi-cores

Content Provider	IEEE Xplore Digital Library
Author	Yingxin Wang Yan Cui Pin Tao Haining Fan Yu Chen Yuanchun Shi
Copyright Year	2011
Abstract	Due to the limitation of power and processor complexity on traditional single core processors, multi-core processors have become the mainstream. One key feature on commodity multi-cores is that the last level cache (LLC) is usually shared. However, the shared cache contention can affect the performance of applications significantly. Several existing proposals demonstrate that task co-scheduling has the potential to alleviate the contention, but it is challenging to make co-scheduling practical in commodity operating systems. In this paper, we propose two lightweight practical textit{cache-aware} co-scheduling methods, namely static SOA and dynamic SOA, to solve the cache contention problem on commodity multi-cores. The central idea of the two methods is that textit{the cache contention can be reduced by adjusting the scheduling order properly}. These two methods are different from each other mainly in the way of acquiring the process's cache requirement. The static SOA (static scheduling order adjustment) method acquires the cache requirement information statically by offline profiling, while the dynamic SOA (dynamic scheduling order adjustment) captures the cache requirement statistics by using performance counters. Experimental results using multi-programmed NAS workloads suggest that the proposed methods can greatly reduce the effect of cache contention on multi-core systems. Specifically, for the static SOA method, the execution time can be reduced by up to 15.7%, the number of cache misses can be reduced by up to 11.8%, and the performance improvement remains obvious across the cache size and the length of time slice. For the dynamic SOA method, the execution time reduction can achieve up to 7.09%.
Starting Page	984
Ending Page	992
File Size	873306
Page Count	9
File Format	PDF
ISBN	9781612844251
ISSN	15302075
DOI	10.1109/IPDPS.2011.248
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-05-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Semiconductor optical amplifiers Measurement Degradation Radiation detectors Scheduling Arrays Kernel
Content Type	Text
Resource Type	Article

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