Collaborators

PERI collaborates both with application teams and with other performance engineering researchers. This page lists the collaborators organized by their role within a particular application engagement or performance tuning effort.

At present, there are 3 main collaboration areas, two focusing on direct engagement with computational science projects:

  1. Tiger Teams
  2. Application code team liaisons
    3. and one on community standards and tool interoperability:
  3. PERI-DB, performance data interoperability

  1. Tiger Teams

    Tiger Teams are focused efforts applied to high priority application codes with well documented performance goals or needs. They are composed of performance optimization experts who are typically members of the PERI collaboration, although other performance engineering experts also participate. While the life time of a Tiger Team is indeterminate, they usually last from six to twelve months.

    At present, PERI has two tiger teams, working with the following codes.

    1. S3D

      S3D solves the full compressible Navier-Stokes equations that describe the conservation of mass, momentum, and energy, and laws of gas behavior, while simultaneously tracking the evolution of reactive species on a rectangular mesh. It uses the message passing interface (MPI) to efficiently distribute the calculation among parallel processors, and is built on a hierarchical, modular structure.

      The S3D Tiger Team was formed to assist the S3D application team in meeting its Joule requirements. Specific concerns of the application team focused on single node performance as well as how the code would scale on the combined Cray XT3/XT4 system at Oak Ridge National Laboratory (ORNL). The Tiger Team has actively worked with the application team to identify several optimization opportunities and to provide mechanisms to exploit them; click here for details. While the application team has successfully met its Joule requirements, the Tiger Team continues to work with them in order to prepare for full scale runs on the anticipated petascale platform at ORNL.

      Tiger Team Lead
      Bronis de Supinski (LLNL)
      Application Team Contact
      Jackie Chen (SNL)
      DOE liaison
      Kenneth Roche (ORNL)
      PERI Team Members
      • David Bailey (LBNL)
      • Bronis de Supinski (LLNL)
      • Mike Fagan, John Mellor-Crummey (Rice)
      • Allan Snavely, Nick Wright (SDSC)
      Affiliate Team Members
      • Sameer Shende, Alan Morris, Allen Maloney, Kevin Huck (UOregon/ParaTools)
      • Jeff Larkin (Cray/ORNL)
      Application Team Participants
      • Jackie Chen, David Lignell (SNL)

    2. GTC: Gyrokinetic Toroidal Code

      The Gyrokinetic Toroidal Code (GTC) has been developed to study plasma microturbulence in fusion devices. The GTC Tiger Team was formed to assist with performance optimization and scalability issues related to achieving the Joule goals for GTC of 1) running 50 percent faster on the model problem, and 2) running twice as long in simulation time for a fixed wallclock time. Click here for a summary of accomplishments. Tiger Team participants are also investigating scalability and load imbalance issues with the new GTC-P version of the code that partitions the poloidal plane into radial shells.

      Tiger Team Lead
      Shirley Moore (UTK)
      Application Team Contact
      Stephane Ethier (PPPL)
      DOE Liaison
      Kenneth Roche (ORNL)
      PERI Team Members
      • Haihang You (UTK)
      • John Mellor-Crummey, Gabriel Marin, Guohua Jin (Rice)
      • Hongzhang Shan (LBNL)
      Affiliate Team Members
      • Kevin Huck (UOregon)
      • Eduardo D'Azevedo (ORNL)
      Application Team Participants
      • Stephane Ethier, Weixing Wang, Wei-li Lee (PPPL)
      • Scott Klasky (ORNL)

  2. Application Liaisons

    In addition to the focused Tiger Team activity, PERI designates members of the PERI collaboration as liaisons with SciDAC science application teams that desire additional help in the performance engineering of their codes. The liaison activity is further broken down into "active" liaisons, in which it is clear how PERI can contribute and in which there is close collaboration between PERI and the application team, and "passive" liaisons, in which PERI provides advice and tracks the progress of the application teams. The status of a PERI liaison activity can change between active and passive at any time, and such changes are expected as the needs of the application projects evolve. As distinct from the Tiger Teams, the liaison activity is a long term engagement with the application teams.

    Active Liaisons

    PERI has active liaison relationships with the following application teams currently:

    1. Advanced Methods for Electronic Structures
      Principal Investigator
      George Fann
      Application Team Contact
      Rebecca Hartman-Baker (ORNL)
      PERI Liaison
      Philip Roth (ORNL)
      Other PERI Personnel
      Haihang You, Keith Seymour (UTK)
      Codes
      MADNESS
    2. Center for Plasma Edge Simulation
      Principal Investigator
      C-S Chang (NYU)
      Application Team Contact
      Julian Cummings (CalTech)
      PERI Liaison
      Patrick Worley (ORNL)
      Other PERI Personnel
      John Mellor-Crummey (Rice)
      Other Affiliates
      Kevin Huck (UOregon)
      Codes
      XGC-1, XGC-0, GTC, M3D, NIMROD, ELITE, DEGAS-2
    3. Community Petascale Project for Accelerator Science and Simulation (ComPASS)
      Principal Investigator
      Panagiotis Spentzouris (Fermi National Accelerator Laboratory)
      Application Team Contact
      John Cary (Tech-X)
      PERI Liaison
      Boyana Norris (ANL)
      Codes
      VORPAL
    4. Hierarchical Petascale Simulation Framework for Stress and Corrosion Cracking
      Principal Investigator
      Priya Vashishta (USC)
      Application Team Contact
      Aiichiro Nakano (USC)
      PERI Liaison
      Mary Hall (USC)
      Other PERI Personnel
      Jacqueline Chame (USC), Chun Chen (USC), John Mellor-Crummey (Rice)
      Codes
      Quantum chemistry
    5. Linear Scale Electronic Structure Calculations for Nanostructures
      Principal Investigator
      Lin-Wang Wang (LBNL)
      Application Team Contact
      Lin-Wang Wang (LBNL)
      PERI Liaison
      David Bailey (LBNL)
      Other PERI Personnel
      Dan Gunter (LBNL), Hongzhang Shan (LBNL)
      Codes
      LS3DF
    6. Modeling Multiscale-Multiphase-Multicomponent Subsurface Reactive Flows using Advanced Computing
      Principal Investigator
      Peter Lichtner (LANL)
      Application Team Contact
      Glenn Hammond (PNNL), Richard Mills (ORNL)
      PERI Liaison
      G. Mahinthakumar (NCSU)
      Other PERI Personnel
      Sarat Sreepathi (NCSU), Vamsi Sreepathi (NCSU)
      Codes
      PFLOTRAN

    Passive Liaisons

    PERI has also assigned passive liaisons to track the performance needs of the following projects:

    1. Hybrid Numerical Methods for Multiscale Simulations of Subsurface Biogeochemical Processes
      PERI Liaison
      G. Mahinthakumar (NCSU)
    2. Framework Application for Core-Edge Transport Simulations (FACETS)
      PERI Liaison
      Patrick Worley (ORNL)
    3. Multidimensional Simulations of Core-Collapse Supernovas
      PERI Liaison
      Robert Fowler (RENCI)
    4. National Computational Infrastructure for Lattice Gauge Theory
      PERI Liaison
      Ying Zhang (RENCI)
    5. A Scalable and Extensible Earth System Model for Climate Change Science
      PERI Liaison
      Patrick Worley (ORNL)
    6. Simulations of Turbulent Flows with Strong Shocks and Density Variations
      PERI Liaison
      Bronis de Supinski (LLNL)

  3. PERI- DB

    The Performance Database Working Group (PERI-DB) involves PERI researchers as well as outside researchers at the University of Oregon, Portland State University, and Texas A&M University. More details on the effort is available on the PERI-DB wiki pages.

    Team Lead
    Ying Zhang (RENCI)
    Other PERI Personnel
    • Shirley Moore (UTK)
    • Dan Gunter (LBNL)
    Affiliate Team Members
    • A Malony, K Huck, A Morris, S Shende (Univ. of Oregon)
    • K Karavanic, K Mohror (Portland State Univ.)
    • J May (LLNL)
    • V Taylor, X Wu (Texas A&M Univ.)