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논문 기본 정보

자료유형
학술저널
저자정보
Xin Wang (Virginia Commonwealth University) Wei Zhang (Virginia Commonwealth University)
저널정보
Korean Institute of Information Scientists and Engineers Journal of Computing Science and Engineering Journal of Computing Science and Engineering Vol.12 No.2
발행연도
2018.6
수록면
50 - 62 (13page)
DOI
10.5626/JCSE.2018.12.2.50

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초록· 키워드

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The current trend toward integrated central processing units (CPUs) and graphics processing units (GPUs) on the same chip presents new challenges for the efficient and fair sharing of resources. Unlike traditional multicores, CPU and GPU cores in the integrated architecture can generate diverse cache traffics and exhibit quite different temporal or spatial data localities. The shared last-level cache (LLC) between the two can result in a large amount of interference between CPU and GPU LLC accesses, thus impacting the performance of both the CPUs and GPUs. Cache bypassing is a promising method to improve LLC performance and to alleviate resource contention between CPUs and GPUs. However, inefficient cache bypassing may lead to significant Network on Chip (NoC) traffic congestion and subsequent performance degradation, particularly for a CPU on a heterogeneous CPU-GPU system with an on-chip ring network. To manage the LLC more efficiently, we propose a sample-based dynamic cache bypassing method for shared LLC in heterogeneous CPU-GPU multicore systems. This method samples the LLC miss rates and NoC traffics for both the CPU and GPU at run-time and uses a statistical bypassing decision-making model to intelligently decide whether to bypass or not. Our experiments show that bypassing CPU can be more useful than bypassing GPU for integrated CPU-GPU architecture with ring-based NoC topology. Our results indicate that bypassing both CPU and GPU can improve CPU performance by 34.30% and GPU performance by 3.20%, while bypassing CPU alone enhances CPU performance by 38.09% and GPU performance by 1.11%, and bypassing GPU alone increases CPU performance by 4.12% and GPU performance by 2.60%, on average.

목차

Abstract
Ⅰ. INTRODUCTION
Ⅱ. BACKGROUND
Ⅲ. MOTIVATION
Ⅳ. IMPLEMENTATION OF SAMPLE BASED DYNAMIC LLC BYPASSING
Ⅴ. METHODOLOGY AND HARDWARE DETAILS
Ⅵ. EXPERIMENTAL RESULTS
Ⅶ. RELATED WORK
Ⅷ. CONCLUSION
REFERENCES

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UCI(KEPA) : I410-ECN-0101-2018-569-003141625