A thermal-sensitive design of a 3D torus-based optical NoC architecture
A thermal-sensitive design of a 3D torus-based optical NoC architecture
复制标题
基于 3D 环面的光学 NoC 架构的热敏设计
DOI：
10.1016/j.vlsi.2019.05.007
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发表时间：
2019-09-01
影响因子：
1.9
通讯作者：
Zhang, Zhe
中科院分区：
文献类型：
--
作者：
Ye, Yaoyao;Zhang, Zhe
为了克服传统电子互连在功率效率和带宽密度方面的限制，基于硅光子学的片上光网络（NoC）被提出作为一种新兴的芯片上通信架构，用于具有大核数的芯片多处理器（cmp）。然而，由于热光学效应，波长选择性硅光子器件如微谐振器遭受温度依赖的波长偏移。在这项工作中，我们提出了一种基于三维环面的光学NoC架构的热敏设计。对于基于三维环面的光学NoC架构，我们提出了一种具有全连接7 × 7光交换结构的混合光电子路由器架构。此外，提出了一种热敏路由算法来优化片上温度变化下的光功率损耗。仿真结果表明，在一组综合业务模式下，与匹配的3D环基光学NoC和传统XYZ路由的3D网格光学NoC相比，采用热敏路由的3D环基光学NoC的平均热致光功率损耗分别降低了14.3%和17%。在一组实际应用中，与匹配的3D环基光学NoC和传统XYZ路由的3D网格光学NoC相比，采用热敏路由的3D环基光学NoC的最坏情况光功率损耗分别降低了7.9%和14.6%。
In order to overcome limitations of traditional electronic interconnects in terms of power efficiency and bandwidth density, optical networks-on-chip (NoC) based on silicon photonics have been proposed as an emerging on chip communication architecture for chip multiprocessors (CMPs) with large core counts. However, due to thermo-optic effects, wavelength-selective silicon photonic devices such as microresonators suffer from temperature-dependent wavelength shift. In this work, we propose a thermal-sensitive design of a 3D torus-based optical NoC architecture. For the 3D torus-based optical NoC architecture, we propose a hybrid optical-electronic router architecture with a fully-connected 7 x 7 optical switching fabric. Besides, a thermal-sensitive routing algorithm is proposed to optimize the optical power loss in the presence of on-chip temperature variations. Simulation results show that for a set of synthetic traffic patterns, the proposed 3D torus-based optical NoC with the thermal-sensitive routing reduces the average thermal-induced optical power loss by 14.3% and 17% respectively as compared to the matched 3D torus-based optical NoC and the 3D mesh-based optical NoC with the traditional XYZ routing. For a set of real applications, the proposed 3D torus-based optical NoC with the thermal sensitive routing reduces the worst-case optical power loss by 7.9% and 14.6% respectively as compared to the matched 3D torus-based optical NoC and the 3D mesh-based optical NoC with the traditional XYZ routing.