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논문 기본 정보

자료유형
학술저널
저자정보
Hao Wen (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.14 No.4
발행연도
2020.12
수록면
131 - 145 (15page)
DOI
10.5626/JCSE.2020.14.4.131

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초록· 키워드

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Current heterogeneous CPU-GPU architectures integrate general-purpose CPUs and highly thread-level parallelized GPUs (graphic processing units) in the same die. The contention in shared resources between CPU and GPU, such as the last level cache (LLC), interconnection network, and DRAM, may degrade both CPU and GPU performance. Our experimental results show that GPU applications tend to have much more power than CPU applications to compete for the shared resources in the LLC and on-chip network, and therefore make CPU suffer from more performance loss. To reduce the GPU’s negative impact on CPU performance, we propose a simple yet effective method based on probability to control the LLC replacement policy for reducing the CPU’s inter-core conflict misses caused by GPU without significantly impacting GPU performance. In addition, we develop two strategies to combine the probability-based method for the LLC and an existing technique called virtual channel partition (VCP) for the interconnection network to further improve the CPU performance. The first strategy statically uses an empirically pre-determined probability value associated with VCP, which can improve the CPU performance by 26% on average, but degrades GPU performance by 5%. The second strategy uses a sampling method to monitor the network congestion and dynamically adjust the probability value used, which can improve the CPU performance by 24%, and only have 1% or 2% performance overhead on GPU applications.

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Abstract
I. INTRODUCTION
II. BACKGROUPD
III. PROBABILITY BASED METHOD FOR LLC REPLACEMENT
IV. VIRTUAL CHANNEL PARTITIONING
V. COMBINING VCP AND PROBABILITY-BASED LLC CONTROL
VI. DRAM SCHEDULING
VII. EXPERIMENTAL METHODOLOGY
VIII. EXPERIMENTAL RESULTS
IX. RELATED WORK
X. CONCLUSION
REFERENCES

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