Power reduction of CMP communication networks via rf-interconnects

Mau-Chung Chang, Jason Cong, Adam Kaplan, Chunyue Liu, Mishali Naik, Jagannath Premkumar, Glenn Reinman, Eran Socher, Sai Wang Tam

Research output: Chapter in Book/Report/Conference proceedingConference contribution

56 Scopus citations

Abstract

As chip multiprocessors scale to a greater number of processing cores, on-chip interconnection networks will experience dramatic increases in both bandwidth demand and power dissipation. Fortunately, promising gains can be realized via integration of Radio Frequency Interconnect (RF-I) through on-chip transmission lines with traditional interconnects implemented with RC wires. While prior work has considered the latency advantage of RF-I, we demonstrate three further advantages of RF-I: (1) RF-I bandwidth can be flexibly allocated to provide an adaptive NoC, (2) RF-I can enable a dramatic power and area reduction by simplification of NoC topology, and (3) RF-I provides natural and efficient support for multicast. In this paper, we propose a novel interconnect design, exploiting dynamic RF-I bandwidth allocation to realize a reconfigurable network-on-chip architecture. We find that our adaptive RF-I architecture on top of a mesh with 4B links can even outperform the baseline with 16B mesh links by about 1%, and reduces NoC power by approximately 65% including the overhead incurred for supporting RF-I.

Original languageEnglish
Title of host publication2008 Proceedings of the 41st Annual IEEE/ACM International Symposium on Microarchitecture, MICRO-41
Pages376-387
Number of pages12
Edition2008 PROCEEDINGS
DOIs
StatePublished - 1 Dec 2008
Event2008 - 41st Annual IEEE/ACM International Symposium on Microarchitecture, MICRO-41 - Lake Como, Italy
Duration: 8 Nov 200812 Nov 2008

Publication series

NameProceedings of the Annual International Symposium on Microarchitecture, MICRO
Number2008 PROCEEDINGS
ISSN (Print)1072-4451

Conference

Conference2008 - 41st Annual IEEE/ACM International Symposium on Microarchitecture, MICRO-41
CountryItaly
CityLake Como
Period8/11/0812/11/08

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