Better energy-delay tradeoff via server resource pooling

Ioannis Kamitsos, Lachlan Andrew, Hongseok Kim, Sangtae Ha, Mung Chiang

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

4 Scopus citations

Abstract

Multi-core architectures have supplanted single core schemes, because they reduce energy consumption by allowing lower clock frequencies. They provide the additional, less exploited benefit of allowing a trade-off between energy consumption and delay by turning off subsets of cores. We investigate what the benefits of this transition are in managing the tradeoff between energy consumption and delay performance, and whether heterogeneity brings additional benefits to outweigh its increased complexity. To do this, we study optimal sleep policies in two settings: switching of homogeneous cores on a fast timescale, which models multiple cores in a CPU, and switching of heterogeneous cores on a slow timescale, which models servers of different generations in a data center. In the homogeneous case, we show the optimal policy is monotone hysteretic, and that the performance is less sensitive to load estimation errors at the design stage when at least two cores are present. In the heterogeneous case, we provide a low complexity algorithm to minimize the power requirements while providing a specified minimum processing speed.

Original languageEnglish (US)
Title of host publication2012 International Conference on Computing, Networking and Communications, ICNC'12
Pages611-616
Number of pages6
DOIs
StatePublished - Apr 24 2012
Event2012 International Conference on Computing, Networking and Communications, ICNC'12 - Maui, HI, United States
Duration: Jan 30 2012Feb 2 2012

Publication series

Name2012 International Conference on Computing, Networking and Communications, ICNC'12

Other

Other2012 International Conference on Computing, Networking and Communications, ICNC'12
CountryUnited States
CityMaui, HI
Period1/30/122/2/12

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Keywords

  • Multi-core
  • Pareto tradeoff
  • data centers
  • heterogeneous
  • robustness

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  • Cite this

    Kamitsos, I., Andrew, L., Kim, H., Ha, S., & Chiang, M. (2012). Better energy-delay tradeoff via server resource pooling. In 2012 International Conference on Computing, Networking and Communications, ICNC'12 (pp. 611-616). [6167495] (2012 International Conference on Computing, Networking and Communications, ICNC'12). https://doi.org/10.1109/ICCNC.2012.6167495