Virtualizing virtual channels for increased network-on-chip robustness and upgradeability

Marios Evripidou, Chrysostomos Nicopoulos, Vassos Soteriou, Jongman Kim

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

Abstract

The Network-on-Chip (NoC) router buffers are instrumental in the overall operation of Chip Multi-Processors (CMP), because they facilitate the creation of Virtual Channels (VC). Both the NoC routing algorithm and the CMP's cache coherence protocol rely on the presence of VCs within the NoC for correct functionality. In this article, we introduce a novel concept that completely decouples the number of supported VCs from the number of VC buffers physically present in the design. Virtual Channel Renaming enables the virtualization of existing virtual channels, in order to support an arbitrarily large number of VCs. Hence, the CMP can (a) withstand the presence of faulty VCs, and (b) accommodate routing algorithms and/or coherence protocols with disparate VC requirements. The proposed VC Renamer architecture incurs minimal hardware overhead to existing NoC designs and is shown to exhibit excellent performance without affecting the router's critical path.

Original languageEnglish (US)
Title of host publicationProceedings - 2012 IEEE Computer Society Annual Symposium on VLSI, ISVLSI 2012
Pages21-26
Number of pages6
DOIs
StatePublished - 2012
Event2012 IEEE Computer Society Annual Symposium on VLSI, ISVLSI 2012 - Amherst, MA, United States
Duration: Aug 19 2012Aug 21 2012

Publication series

NameProceedings - 2012 IEEE Computer Society Annual Symposium on VLSI, ISVLSI 2012

Other

Other2012 IEEE Computer Society Annual Symposium on VLSI, ISVLSI 2012
CountryUnited States
CityAmherst, MA
Period8/19/128/21/12

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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