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The Journal of Supercomputing

, Volume 68, Issue 3, pp 1088–1112 | Cite as

Adaptive global power optimization for Web servers

  • Leonardo Piga
  • Reinaldo A. Bergamaschi
  • Mauricio Breternitz
  • Sandro Rigo
Article

Abstract

This work investigates power and performance trade-offs for Web servers on a state-of-the-art, high-density, power-efficient SeaMicro SM15k cluster by AMD. We relied on the concept of virtual power states (VPSs), a combination of CPU utilization rate to the P/C power states available in modern processors, and on our global optimization algorithm called Slack Recovery, to deploy an adaptive global power management system in a production environment. The main contributions of this paper are twofold. First, it presents the Slack Recovery algorithm deployed on a real cluster, composed of 25 SeaMicro nodes. The algorithm finds a P-state and a utilization rate for each CPU node to minimize power under a minimum performance requirement. Second, it proposes a novel mechanism to control utilization rates in each server, a key aspect on our power/performance optimization system which enables the implementation of the VPS concept in practice. Experimental results show that our Slack Recovery-based system can reduce up to 6.7 % of the power consumption when compared to policies usually deployed in SeaMicro production systems.

Keywords

Power management High-density servers Web server  Power optimization Cluster 

Notes

Acknowledgments

Financial support for this study was provided by the Grant 2010/05389-5 from Sao Paulo Research Foundation (FAPESP) and AMD Research.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Leonardo Piga
    • 1
  • Reinaldo A. Bergamaschi
    • 1
  • Mauricio Breternitz
    • 2
  • Sandro Rigo
    • 1
  1. 1.Institute of ComputingUniversity of Campinas (UNICAMP)CampinasBrazil
  2. 2.Advanced Micro DevicesAustinUSA

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