Teleconference 2016-02-03

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Attendees: Ken Moreland (SNL), Rob Maynard (Kitware), Matt Larsen (LLNL), Tom Fogal (NVIDIA), Hendrik Schroots (Intel), Jeremy Meredith (ORNL)

Rob is looking at the VTK-side of filters (how it will interface). Also looking for any template usage in VTK-m that is inefficient.

Do we have good coverage for GTC? Chris is managing that, but could not come today.

Dave has been working on the mesa stuff. Has osmesa hacked in. There might be a bug with the external faces, but not sure. Working on other mesh types. Adding some basic annotation stuff.

Font libraries? Jeremy would like to use a "liberation" font library with an open license.

Working on Matt's branch with ray casting stuff with non-ready-for-prime-time stuff pulled out.

Chris sent a note that he has some Legion VTK-m code running with some help from Chuck at Kitware.

We went over the Version 1.0 ToDo List. Here is a snapshot.

Feature Status
Settling of the core interface Other than little things and filters, the core interface is pretty well set.
  • Rob has a question about the "dimensionality" of the cell sets. That is supposed to be the topological dimensions of the cells. This would require all the cells having the same dimensionality, which is not really being honored. This is causing some problems. Jeremy and Rob need talk about this.
Standardization of "filters"
  • Proposal for filter interfaces in issue #17
There is a WIP branch on the implementation of filters with a few initial filters added to it. We should have a design discussion about it.
Support worklet operations that are not one-to-one output Done
Basic file I/O Done.
Basic rendering Starting with some base classes from Matt. Can render a grid using external faces and write that out to a file. Uniform grids only right now.
Clean up Doxygen Need to get documentation syncing nightly. Chuck looking into this.
User's Guide Behind. Trying to catch up. Making some progress.
Green dashboard
  • Still have problems with some CUDA dashboards
    • Some may have been resolved
    • There are issues with dejagore running out of memory
  • There have been some interop failures. - Rob thinks they are fixed.
    • Probably actually an X-windows issue. Chuck will look into this. Not currently at the top of his priority.
  • Some further output issues on Windows (see delve dashboards e.g. https://open.cdash.org/viewTest.php?onlyfailed&buildid=4123995)
    • Need to get the buildbot tests running nightly to check up on this issue.
  • Some timeout issues on renar (e.g. https://open.cdash.org/viewTest.php?onlyfailed&buildid=4123644). Could be caused by JIT of CUDA kernels or might be because multiple things are running.
    • Some issues have been found and will be worked out.
Prototype VTK/ParaView/VisIt integration

(Technically not part of the release, but should indicate we have viable components.)

* Eric Brugger has made some progress on integrating VTK-m into VisIt. He has an initial implementation and it is working pretty well so far. He has lately added further cell type support (particularly unstructured grids).
  • Rob working on VTK/VTK-m filter integration. Going through all the combinations of converting data types between one and another.