A novel low-waveguide-crossing floorplan for fat tree based optical networks-on-chip

Author

Wang, Zhehui ; Xu, Jiang ; Wu, Xiaowen ; Ye, Yaoyao ; Zhang, Wei ; Liu, Weichen ; Nikdast, Mahdi ; Wang, Xuan ; Wang, Zhe

Author_Institution

Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong, China

fYear

2012

fDate

20-23 May 2012

Firstpage

100

Lastpage

101

Abstract

Optical network-on-chip (ONoC) can be used as the communication backbone for high performance chip multiprocessors (CMPs). Fat tree based ONoC shows high throughput, small delay and low power consumption. However, the traditional floorplan design of fat tree based ONoC has a large number of waveguide crossings because of the fat tree topology. In this paper, we present an optimized floorplan with the least number of waveguide crossings that has been reported. The average number of waveguide crossings per optical path in the optimized floorplan is 87% less than that in traditional floorplan for a 64-core CMP. We also find the optimal aspect ratio of cores to minimize the end-to-end delay. These work could help to ease the physical implementation of fat tree based ONoC for CMP.

Keywords

circuit layout; multiprocessor interconnection networks; network topology; optical interconnections; optical waveguides; trees (mathematics); CMP; ONoC; aspect ratio; chip multiprocessors; end-to-end delay; fat tree topology; low-waveguide-crossing floorplan; optical networks-on-chip; Indexes; Optical attenuators; Optical crosstalk; Optical device fabrication; Optical interconnections; Optical resonators; Optical waveguides;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Interconnects Conference, 2012 IEEE

Conference_Location

Santa Fe, NM

Print_ISBN

978-1-4577-1620-1

Type

conf

DOI

10.1109/OIC.2012.6224427

Filename

6224427