Cherry-picking: Exploiting process variations in dark-silicon homogeneous chip multi-processors

Bharathwaj Raghunathan, Yatish Turakhia, Siddharth Garg, Diana Marculescu

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

Abstract

It is projected that increasing on-chip integration with technology scaling will lead to the so-called dark silicon era in which more transistors are available on a chip than can be simultaneously powered on. It is conventionally assumed that the dark silicon will be provisioned with heterogeneous resources, for example dedicated hardware accelerators. In this paper we challenge the conventional assumption and build a case for homogeneous dark silicon CMPs that exploit the inherent variations in process parameters that exist in scaled technologies to offer increased performance. Since process variations result in core-to-core variations in power and frequency, the idea is to cherry pick the best subset of cores for an application so as to maximize performance within the power budget. To this end, we propose a polynomial time algorithm for optimal core selection, thread mapping and frequency assignment for a large class of multi-threaded applications. Our experimental results based on the Sniper multi-core simulator show that up to 22% and 30% performance improvement is observed for homogeneous CMPs with 33% and 50% dark silicon, respectively.

Original languageEnglish (US)
Title of host publicationProceedings - Design, Automation and Test in Europe, DATE 2013
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages39-44
Number of pages6
ISBN (Print)9783981537000
DOIs
StatePublished - 2013
Event16th Design, Automation and Test in Europe Conference and Exhibition, DATE 2013 - Grenoble, France
Duration: Mar 18 2013Mar 22 2013

Publication series

NameProceedings -Design, Automation and Test in Europe, DATE
ISSN (Print)1530-1591

Other

Other16th Design, Automation and Test in Europe Conference and Exhibition, DATE 2013
CountryFrance
CityGrenoble
Period3/18/133/22/13

ASJC Scopus subject areas

  • Engineering(all)

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    Raghunathan, B., Turakhia, Y., Garg, S., & Marculescu, D. (2013). Cherry-picking: Exploiting process variations in dark-silicon homogeneous chip multi-processors. In Proceedings - Design, Automation and Test in Europe, DATE 2013 (pp. 39-44). [6513469] (Proceedings -Design, Automation and Test in Europe, DATE). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.7873/date.2013.023