الفهرس 
Background and Related workOnly 14 pages are availabe for public view
Abstract
Recent advances in the manufacturing of nano-photonic devices and optical networks on chip together with advanced optical routing can enable hetero- geneous HPC systems of more than 1000 cores to efficiently perform terascale computing.
In this work, a Wavelength Division Multiplexed Photonic Network-on- Chip (WDM-PNoC) is proposed to replace the conventional electrical Network- on-Chip (NoC) of the homogeneous HPC systems and will be simulated on an IBM Blue Gene/q compute chip as a case study. The proposed WDM-PNoC is intended to reduce the performance limitations of homogeneous HPC systems and provide significant low latency, high bandwidth, and low power dissipa- tion. A WDM-PNoC architecture for optical routing and switching is modeled and developed using a customized version of the PhoenixSim simulator. The proposed models are based on recent advancement in nano-photonics device fabrication, architecture design, CAD optimization and include on-chip opti- cal light sources and modulators, photodetectors, buffers, switches, couplers, optical waveguides, and on-chip WDM devices.
Through a series of simulations, the efficiency of the proposed system is studied in terms of power and energy consumption, data transmission latency and throughput. Moreover, the design parameters of a commercial IBM Blue Gene/q compute chip were used to compare the overall system performance using its current conventional electrical architecture with WDM-PNoC archi- tecture under synthetic random traffic with different loads. The proposed
architecture reduces the overall energy consumption by approximately 40% compared with the electronic one, and achieves an average decrease in end-to- end delay of approximately 60%, meanwhile it remarkably exceeds the offered throughput of the current commercial system.
An enhanced WDM-PNoC model is proposed by including an enhanced WDM-PNoC architecture, which reduces the overall energy consumption by approximately 40% when it is compared with the static WDM-PNoC without negatively affecting the end-to-end delay. The results also show the perfor- mance superiority of the proposed enhanced WDM-PNoC.