Teleconference 2019-02-27

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Attendees: Ken Moreland (SNL), Rob Maynard (Kitware), Ollie Lo (LANL), Matt Larsen (LLNL), Dave Pugmire (ORNL), Allie Vencati (Kitware), Berk Geveci (Kitware), Sujin Philip (Kitware)

ECP Updates

  • Soon (March 15) we will need to submit P6 activities. More details the beginning of next week.

ECP deliverable updates


  • [MS-19/04] Ghost Cells
    • Merge request in for ghost cell removal how Matt needs them.
    • Some issues with the ghost array being UInt8.
      • Probably should add UInt8 to common types, at least in the short term.
      • In the long term, we need a way to support a slow path for "unknown" types.
    • Ghost cell filter for structured cells has been merged in.
  • [MS-19/05] Merge Points
    • Ken has an implementation in a merge request.
    • Working through CUDA compile error.
  • [MS-19/06] Connected Components
    • Expecting to have an MR either end of this week or beginning of next.
  • [MS-19/07] Advect Time Varying
    • Still having some issues with grid evaluators.
      • Rob will look into it.


  • [MS-19/08] Point Movement 2
    • There are already some filters in for point movement.
    • Still need some user's guide documentation


  • [MS-19/09] Path Geometry
    • Not started
    • Some of the functionality is already there
  • [MS-20/01] Lightweight Cell Library
    • Most of the underlying library is ready.
    • Almost ready.
    • Still need to implement VTK-m data around it.
  • [MS-20/02] Specialized Data Models
    • Some work on how XGC used a rotated triangular grid for a bunch of wedges.
    • Need to generalize some code written by Matt.
  • [MS-20/03] Feature-Sensitive Surface Norm
    • Still working on bitfield implementation
      • Needed for graph traversal
    • Everything else is complete
  • [MS-20/04] VTK-m Release 3
    • On track
  • [MS-20/05] Cell Metrics
    • Brent is working on this.
    • Steven Walten will take over soon as Brent is about to graduate.
  • [MS-20/06] Contouring
    • Need to support all cell types
  • [MS-20/07] Advanced Flow Algorithms
    • Still deciding what we want to do.
    • Dave is working on generalizing cell lookups and evaluators to work on all grid types

Rountable notes

Matt created better shared pointer memory management in the rendering library.

Ability to strip ghost cells from rectilinear grid has been very helpful.

Matt has been having issues with CUDA builds.

Ken has been having issues on compiling VTK-m on Summit with the XLC compiler. It was not finding the C++11 extensions. Rob says try the 3.14 rc.