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@TECHREPORT{Brmmel:188191,
      author       = {Brömmel, Dirk and Frings, Wolfgang and Wylie, Brian J. N.},
      title        = {{JUQUEEN} {E}xtreme {S}caling {W}orkshop 2015},
      number       = {FZJ-JSC-IB-2015-01},
      reportid     = {FZJ-2015-01645, FZJ-JSC-IB-2015-01},
      pages        = {51p},
      year         = {2015},
      abstract     = {In conjunction with this year's JUQUEEN Porting and Tuning
                      Workshop, which is part of the PRACE Advanced Training
                      Centres curriculum, JSC continued its series of BlueGene
                      Extreme Scaling Workshops. Seven application teams were
                      invited to stay for two days and work on the scalability of
                      their codes, with dedicated access to the entire JUQUEEN
                      system for a period of 30 hours. Most of the teams' codes
                      had thematic overlap with JSC Simulation Laboratories or
                      were part of an ongoing collaboration with one of the
                      SimLabs. The code teams came from the fields of climate
                      science (ICON from DKRZ, and MPAS-A from KIT and NCAR),
                      engineering (FEMPAR from UPC, and $ex_nl/FE^2$ from Uni
                      Cologne and TU Freiberg), fluid dynamics (psOpen and SHOCK
                      both from RWTH Aachen), and neuroscience (CoreNeuron from
                      the EPFL Blue Brain Project) and were supported by JSC
                      SimLabs and Cross-sectional teams, with IBM and JUQUEEN
                      technical support. Within the first 24 hours of dedicated
                      access to the entire 28 racks, all seven teams had adapted
                      their codes and datasets to exploit the massive parallelism
                      and restricted node memory for successful executions using
                      all 458,752 cores. Most of them also demonstrated excellent
                      strong or weak scalability, qualifying all but one for the
                      High-Q Club. A total of 370 'large' jobs were executed using
                      12 of the 15 million core-hours of compute time allocated
                      for the workshop. Detailed results for each code, provided
                      by the application teams themselves, is introduced by
                      analysis comparing them to the other 16 High-Q Club codes.},
      cin          = {JSC},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {511 - Computational Science and Mathematical Methods
                      (POF3-511) / ATMLPP - ATML Parallel Performance (ATMLPP) /
                      ATMLAO - ATML Application Optimization and User Service
                      Tools (ATMLAO)},
      pid          = {G:(DE-HGF)POF3-511 / G:(DE-Juel-1)ATMLPP /
                      G:(DE-Juel-1)ATMLAO},
      typ          = {PUB:(DE-HGF)15},
      url          = {https://juser.fz-juelich.de/record/188191},
}