Cache Access Fairness in 3D Mesh-Based NUCA Article Swipe

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Zicong Wang , Xiaowen Chen , Zhonghai Lu , Yang Guo · YOU? · · 2018 · Open Access · · DOI: https://doi.org/10.1109/access.2018.2862633

Given the increase in cache capacity over the past few decades, cache access efficiency has come to play a critical role in determining system performance. To ensure efficient utilization of the cache resources, non-uniform cache architecture (NUCA) has been proposed to allow for a large capacity and a short access latency. With the support of networks-on-chip (NoC), NUCA is often employed to organize the last level cache. However, this method also hurts cache access fairness, which denotes the degree of non-uniformity for cache access latencies. This drop in fairness can result in an increased number of cache accesses with overhigh latency, which leads to a bottleneck in system performance. This paper investigates the cache access fairness in the context of NoC-based 3-D chip architecture, and provides new insights into 3-D architecture design. We propose fair-NUCA (F-NUCA), a co-design scheme intended to optimize cache access fairness. In F-NUCA, we strive to improve fairness by equalizing cache access latencies. To achieve this goal, the memory mapping and the channel width are both redistributed non-uniformly, thereby equalizing the non-contention and contention latencies, respectively. The experimental results reveal that F-NUCA can effectively improve cache access fairness. When F-NUCA is compared with the traditional static NUCA in a simulation with PARSEC benchmarks, the average reductions in average latency and latency standard deviation are 4.64%/9.38% for a 4 × 4 × 2 mesh network, as well as 6.31%/13.51% for a 4 × 4 × 4 mesh network. In addition, a 4.0%/6.4% improvement in system throughput can be achieved for the two scales of mesh networks, respectively.

Type

article

Language

en

Landing Page

https://doi.org/10.1109/access.2018.2862633

OA Status

gold

Cited By

3

References

46

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10

OpenAlex ID

https://openalex.org/W2889035919

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OpenAlex ID

https://openalex.org/W2889035919

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DOI

https://doi.org/10.1109/access.2018.2862633

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Title

Cache Access Fairness in 3D Mesh-Based NUCA

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Type

article

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Language

en

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Publication year

2018

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Publication date

2018-01-01

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Authors

Zicong Wang, Xiaowen Chen, Zhonghai Lu, Yang Guo

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https://doi.org/10.1109/access.2018.2862633

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Open access

Yes

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OA status

gold

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OA URL

https://doi.org/10.1109/access.2018.2862633

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Concepts

Computer science, Cache, Cache pollution, Cache algorithms, Cache coloring, Smart Cache, Page cache, Parallel computing, Cache invalidation, Computer network, Bottleneck, CPU cache, Embedded system

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Cited by

3

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2023: 1, 2022: 1, 2019: 1

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References (count)

46

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Related works (count)

10

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