Efficient Architectures for Multichip Communication.

详细信息   

• 作者：Zulfiqar ; Mohammad Arslan.
• 学历：Doctor
• 年：2014
• 毕业院校：The University of Wisconsin
• Department：Electrical and Computer Engineering.
• ISBN：9781321163100
• CBH：3635321
• Country：USA
• 语种：English
• FileSize：1599040
• Pages：136

文摘

The trend towards many-core systems continues to grow. Scaling single chip systems with higher core counts however leads to increasing fabrication costs and low process yields. Multichip systems can alleviate these concerns but require substantial chip-to-chip bandwidth to provide sustained performance. Due to the limited density of chip I/O pins and excessive power consumption of high-speed serial links,silicon photonic technology has been proposed as an alternative for networking multichip systems. This dissertation explores the design space of multichip photonic networks and makes several contributions. Optical crossbars channel sharing) designs are popular in nanophotonic literature. These architectures improve performance by allowing nodes to share the network channels. However,this sharing comes at a cost: increased optical laser) power consumption. To explore this performance-power trade-off,an analytical model is developed in this thesis that quantifies the limits and performance gains of channel sharing techniques. Furthermore,an opportunistic channel sharing architecture called wavelength stealing is proposed. The wavelength stealing architecture does not incur any arbitration overheads in accessing the shared channels and guarantees fairness. Switched networks are ubiquitous in computer systems. In photonic networks,the switching elements routers) can be optical or electrical. A recent paper has shown that breakthroughs are required in device development to make optical switching viable. This leaves electrical switching as an alternative design option to explore for switched photonic networks. In this context,this dissertation is the first work to provide an in-depth evaluation of electrical switching within the constraints of silicon photonic technology. Advocating a topology-aware design approach,this thesis also proposes novel router designs that avoid expensive logic structures such as allocators and crossbars. Furthermore,this dissertation provides novel quality-of-service mechanisms for providing performance isolation and service differentiation between virtual machines VMs) running on a nanophotonic system.