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Architectural support predicting method for CMP scheduling

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4 Author(s)
Gangyong Jia ; Dept. of Comput. Sci. & Technol., Univ. of Sci. & Technol. of China (USTC), Hefei, China ; Xi Li ; Xuehai Zhou ; Dong Dai

On a CMP (Chip Multi-Processor) architecture, cache sharing impacts threads non-uniformly, where some threads may be slowed down significantly, while others are not. This may cause severe performance problems such as throughput decreasing, cache thrashing. This paper proposes an architectural support predicting method (ASPM) to predict inter-thread cache contention, and schedules threads based on the results of the predicting on the CMP architecture. The architectural support consists of novel tagging which is remembering each cache line's interval time of reaccessing. The ASPM is very little loss of accuracy basis at low overhead (<;1%). We use this method for CMP scheduling, and find the performance is improving 9% on average.

Published in:

Computer Research and Development (ICCRD), 2011 3rd International Conference on  (Volume:4 )

Date of Conference:

11-13 March 2011