Dynamic directories: A mechanism for reducing on-chip interconnect power in multicores

Abhishek Das*, Matt Schuchhardt, Nikos Hardavellas, Gokhan Memik, Alok Nidhi Choudhary

*Corresponding author for this work

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

12 Citations (Scopus)

Abstract

On-chip interconnection networks consume a significant fraction of the chip's power, and the rapidly increasing core counts in future technologies is going to further aggravate their impact on the chip's overall power consumption. A large fraction of the traffic originates not from data messages exchanged between sharing cores, but from the communication between the cores and intermediate hardware structures (i.e., directories) for the purpose of maintaining coherence in the presence of conflicting updates. In this paper, we propose Dynamic Directories, a method allowing the directories to be placed arbitrarily in the chip by piggy-backing the virtual to physical address translation. This eliminates a large fraction of the on-chip interconnect traversals, hence reducing the power consumption. Through trace-driven and cycle-accurate simulation in a range of scientific and Map-Reduce applications, we show that our technique reduces the power and energy expended by the on-chip interconnect by up to 37% (16.4% on average) with negligible hardware overhead and a small improvement in performance (1.3% on average).

Original languageEnglish (US)
Title of host publicationProceedings - Design, Automation and Test in Europe Conference and Exhibition, DATE 2012
Pages479-484
Number of pages6
StatePublished - May 24 2012
Event15th Design, Automation and Test in Europe Conference and Exhibition, DATE 2012 - Dresden, Germany
Duration: Mar 12 2012Mar 16 2012

Other

Other15th Design, Automation and Test in Europe Conference and Exhibition, DATE 2012
CountryGermany
CityDresden
Period3/12/123/16/12

Fingerprint

Electric power utilization
Physical addresses
Hardware
Communication

Keywords

  • Multicore architecture
  • Non-uniform caches
  • On-chip networks

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Das, A., Schuchhardt, M., Hardavellas, N., Memik, G., & Choudhary, A. N. (2012). Dynamic directories: A mechanism for reducing on-chip interconnect power in multicores. In Proceedings - Design, Automation and Test in Europe Conference and Exhibition, DATE 2012 (pp. 479-484). [6176456]
Das, Abhishek ; Schuchhardt, Matt ; Hardavellas, Nikos ; Memik, Gokhan ; Choudhary, Alok Nidhi. / Dynamic directories : A mechanism for reducing on-chip interconnect power in multicores. Proceedings - Design, Automation and Test in Europe Conference and Exhibition, DATE 2012. 2012. pp. 479-484
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Das, A, Schuchhardt, M, Hardavellas, N, Memik, G & Choudhary, AN 2012, Dynamic directories: A mechanism for reducing on-chip interconnect power in multicores. in Proceedings - Design, Automation and Test in Europe Conference and Exhibition, DATE 2012., 6176456, pp. 479-484, 15th Design, Automation and Test in Europe Conference and Exhibition, DATE 2012, Dresden, Germany, 3/12/12.

Dynamic directories : A mechanism for reducing on-chip interconnect power in multicores. / Das, Abhishek; Schuchhardt, Matt; Hardavellas, Nikos; Memik, Gokhan; Choudhary, Alok Nidhi.

Proceedings - Design, Automation and Test in Europe Conference and Exhibition, DATE 2012. 2012. p. 479-484 6176456.

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

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Das A, Schuchhardt M, Hardavellas N, Memik G, Choudhary AN. Dynamic directories: A mechanism for reducing on-chip interconnect power in multicores. In Proceedings - Design, Automation and Test in Europe Conference and Exhibition, DATE 2012. 2012. p. 479-484. 6176456