A high-throughput distributed shared-buffer NoC router

Vassos Soteriou, Rohit Sunkam Ramanujam, Bill Lin, Li Shiuan Peh

Research output: Contribution to journalArticle

Abstract

Microarchitectural configurations of buffers in routers have a significant impact on the overall performance of an on-chip network (NoC). This buffering can be at the inputs or the outputs of a router, corresponding to an input-buffered router (IBR) or an output-buffered router (OBR). OBRs are attractive because they have higher throughput and lower queuing delays under high loads than IBRs. However, a direct implementation of OBRs requires a router speedup equal to the number of ports, making such a design prohibitive given the aggressive clocking and power budgets of most NoC applications. In this letter, we propose a new router design that aims to emulate an OBR practically based on a distributed shared-buffer (DSB) router architecture. We introduce innovations to address the unique constraints of NoCs, including efficient pipelining and novel flow control. Our DSB design can achieve significantly higher bandwidth at saturation, with an improvement of up to 20 when compared to a state-of-the-art pipelined IBR with the same amount of buffering, and our proposed microarchitecture can achieve up to 94 of the ideal saturation throughput.

Original languageEnglish (US)
Article number4906238
Pages (from-to)21-24
Number of pages4
JournalIEEE Computer Architecture Letters
Volume8
Issue number1
DOIs
StatePublished - Jan 2009

ASJC Scopus subject areas

  • Hardware and Architecture

Fingerprint Dive into the research topics of 'A high-throughput distributed shared-buffer NoC router'. Together they form a unique fingerprint.

  • Cite this