Special Issue Paper

Computer Science - Research and Development

, Volume 25, Issue 3, pp 149-154

First online:

QPACE: power-efficient parallel architecture based on IBM PowerXCell 8i

  • H. BaierAffiliated withIBM Deutschland Research & Development GmbH
  • , H. BoettigerAffiliated withIBM Deutschland Research & Development GmbH
  • , M. DrochnerAffiliated withResearch Center Jülich
  • , N. EickerAffiliated withResearch Center JülichUniversity of Wuppertal
  • , U. FischerAffiliated withIBM Deutschland Research & Development GmbH
  • , Z. FodorAffiliated withUniversity of Wuppertal
  • , A. FrommerAffiliated withUniversity of Wuppertal
  • , C. GomezAffiliated withIBM La Gaude
  • , G. GoldrianAffiliated withIBM Deutschland Research & Development GmbH
    • , S. HeybrockAffiliated withDepartment of Physics, University of Regensburg
    • , D. HierlAffiliated withDepartment of Physics, University of Regensburg
    • , M. HüskenAffiliated withUniversity of Wuppertal
    • , T. HuthAffiliated withIBM Deutschland Research & Development GmbH
    • , B. KrillAffiliated withIBM Deutschland Research & Development GmbH
    • , J. LauritsenAffiliated withIBM Deutschland Research & Development GmbH
    • , T. LippertAffiliated withResearch Center JülichUniversity of Wuppertal
    • , T. MaurerAffiliated withDepartment of Physics, University of Regensburg
    • , B. MendlAffiliated withDepartment of Physics, University of Regensburg
    • , N. MeyerAffiliated withDepartment of Physics, University of Regensburg
    • , A. NobileAffiliated withDepartment of Physics, University of Regensburg
    • , I. OudaAffiliated withIBM Rochester
    • , M. PivantiAffiliated withUniversity of Ferrara
    • , D. PleiterAffiliated withDeutsches Elektronen Synchrotron (DESY) Email author 
    • , M. RiesAffiliated withIBM Deutschland Research & Development GmbH
    • , A. SchäferAffiliated withDepartment of Physics, University of Regensburg
    • , H. SchickAffiliated withIBM Deutschland Research & Development GmbH
    • , F. SchifanoAffiliated withUniversity of Ferrara
    • , H. SimmaAffiliated withDeutsches Elektronen Synchrotron (DESY)
    • , S. SolbrigAffiliated withDepartment of Physics, University of Regensburg
    • , T. StreuerAffiliated withDepartment of Physics, University of Regensburg
    • , K.-H. SulankeAffiliated withDeutsches Elektronen Synchrotron (DESY)
    • , R. TripiccioneAffiliated withUniversity of Ferrara
    • , J.-S. VogtAffiliated withIBM Deutschland Research & Development GmbH
    • , T. WettigAffiliated withDepartment of Physics, University of Regensburg
    • , F. WinterAffiliated withDepartment of Physics, University of RegensburgDeutsches Elektronen Synchrotron (DESY)

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Abstract

QPACE is a novel massively parallel architecture optimized for lattice QCD simulations. Each node comprises an IBM PowerXCell 8i processor. The nodes are interconnected by a custom 3-dimensional torus network implemented on an FPGA. The architecture was systematically optimized with respect to power consumption. This put QPACE in the number one spot on the Green500 List published in November 2009. In this paper we give an overview of the architecture and highlight the steps taken to improve power efficiency.

Keywords

Parallel architectures Special-purpose and application-based systems