Abstract

High-performance computing systems and datacenters will interconnect hundreds to thousands of heterogeneous general purpose or specialized cores in the future. As the number of network end-point sockets scales exponentially, the underlying communication fabric must deliver high bandwidth with low power and reduced switching complexity. While high-radix routers enable smaller diameter networks, the penalty is in increased switching complexity and router power. In this paper, we propose SPRINT (scalable photonic reconfigurable interconnect), which can scale to a large number of cores using photonic switching implemented with silicon micro-ring resonators (MRRs). MRRs are low power, high bandwidth photonic switching devices that can be arranged to function similarly to a high-radix router with reduced complexity and power. We will first show the design of a 64 core cluster using optical interconnects and electrical packet switching. To build scalable switching crossconnects, we investigate the design of 256-, 512- and 1024-socket versions of SPRINT connected to function as passive arrayed-waveguide gratings. Our proposed switching crossconnect with single and dual micro-rings minimizes the hop count to 4 for a 1024 core network while reducing the power dissipation, increasing the bandwidth and reducing the switching complexity.

© 2012 OSA

Full Article  |  PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription