EnergySmart: Toward energy-efficient manycores for Near-Threshold Computing

Ulya R. Karpuzcu, Abhishek Sinkar, Nam Sung Kim, Josep Torrellas

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

45 Scopus citations

Abstract

While Near-Threshold Voltage Computing (NTC) is a promising approach to push back the manycore power wall, it suffers from a high sensitivity to parameter variations. One possible way to cope with variations is to use multiple on-chip voltage (Vdd) domains. However, this paper finds that such an approach is energy inefficient. Consequently, for NTC, we propose a manycore organization that has a single Vdd domain and relies on multiple frequency domains to tackle variation. We call it EnergySmart. For this approach to be competitive, it has to be paired with effective core assignment strategies and also support fine-grain (i.e., short-interval) DVFS. This paper shows that, at NTC, a simple chip with a single Vdd domain can deliver a higher performance per watt than one with multiple Vdd domains.

Original languageEnglish (US)
Title of host publication19th IEEE International Symposium on High Performance Computer Architecture, HPCA 2013
Pages542-553
Number of pages12
DOIs
StatePublished - Jul 23 2013
Event19th IEEE International Symposium on High Performance Computer Architecture, HPCA 2013 - Shenzhen, China
Duration: Feb 23 2013Feb 27 2013

Publication series

NameProceedings - International Symposium on High-Performance Computer Architecture
ISSN (Print)1530-0897

Other

Other19th IEEE International Symposium on High Performance Computer Architecture, HPCA 2013
CountryChina
CityShenzhen
Period2/23/132/27/13

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Karpuzcu, U. R., Sinkar, A., Kim, N. S., & Torrellas, J. (2013). EnergySmart: Toward energy-efficient manycores for Near-Threshold Computing. In 19th IEEE International Symposium on High Performance Computer Architecture, HPCA 2013 (pp. 542-553). [6522348] (Proceedings - International Symposium on High-Performance Computer Architecture). https://doi.org/10.1109/HPCA.2013.6522348