Exploring Heterogeneous NoC Design Space in Heterogeneous GPU-CPU Architectures

Juan Fang*, Zhen Yu Leng, Si Tong Liu, Zhi Cheng Yao, Xiu Feng Sui

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

17 引用 (Scopus)

摘要

Computer architecture is transiting from the multicore era into the heterogeneous era in which heterogeneous architectures use on-chip networks to access shared resources and how a network is configured will likely have a significant impact on overall performance and power consumption. Recently, heterogeneous network on chip (NoC) has been proposed not only to achieve performance comparable to that of the NoCs with buffered routers but also to reduce buffer cost and energy consumption. However, heterogeneous NoC design for heterogeneous GPU-CPU architectures has not been studied in depth. This paper first evaluates the performance and power consumption of a variety of static hot-potato based heterogeneous NoCs with different buffered and bufferless router placements, which is helpful to explore the design space for heterogeneous GPU-CPU interconnection. Then it proposes Unidirectional Flow Control (UFC), a simple credit-based flow control mechanism for heterogeneous NoC in GPU-CPU architectures to control network congestion. UFC can guarantee that there are always unoccupied entries in buffered routers to receive flits coming from adjacent bufferless routers. Our evaluations show that when compared to hot-potato routing, UFC improves performance by an average of 14.1% with energy increased by an average of 5.3% only.

源语言英语
页(从-至)74-83
页数10
期刊Journal of Computer Science and Technology
30
1
DOI
出版状态已出版 - 1月 2015
已对外发布

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