By Topic

Swizzle-Switch Networks for Many-Core Systems

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

12 Author(s)
Sewell, K. ; Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI, USA ; Dreslinski, R.G. ; Manville, T. ; Satpathy, S.
more authors

This work revisits the design of crossbar and high-radix interconnects in light of advances in circuit and layout techniques that improve crossbar scalability, obviating the need for deep multi-stage networks. We employ a new building block, the Swizzle-Switch-an energy and area-efficient switching element that can readily scale to radix 64-that has recently been validated via silicon test chips in 45 nm technology. We evaluate the Swizzle-Switch as both the high-radix building block of a Flattened Butterfly and as a single-stage interconnect, the Swizzle-Switch Network. In the process we address the architectural and layout challenges associated with centralized crossbar systems. Compared to a conventional Mesh, the Flattened Butterfly provides a 15% performance improvement with a 2.5× reduction in the standard deviation of on-chip access times. The Swizzle-Switch Network achieves further gains, providing a 21% improvement in performance, a 3× reduction in on-chip access variability, a 33% reduction in interconnect power, and a 25% reduction in total system energy while only increasing chip area by 7%. Finally, this paper details a 3-D integrated version of the Swizzle-Switch Network, showing up to a 30% gain in performance over the 2-D Swizzle-Switch Network for benchmarks sensitive to interconnect latency. One major concern with 3-D designs is thermal dissipation. We show through detailed thermal analysis that with the highly energy-efficient Swizzle-Switch Network design that the thermal budget is well within that of passive cooling solutions.

Published in:

Emerging and Selected Topics in Circuits and Systems, IEEE Journal on  (Volume:2 ,  Issue: 2 )