Casa Parallelization meeting minutes

Monday February 11th Room 317, 3:30pm MDT

Attendees:

Targets/task

• Large channel count cube imaging
  • Status pending next target
• Remaining partition non-compliant tasks
  • Status update on tasks that still need work to be partition compliant
  • cvel, split, hanning-smooth being worked on. Targetted for 4.1
  • Some subset in 4.1
• Parallelization of MS-MFS major cycle
  • Urvashi is working on to do for 4.1 with more complete solution after 4.1
  • Will include new FT machines, mosaicing, A-projection added to MS-MFS
• Filler
  • Discussion of lazy filler potentially available by end of January.
  • Status and future plans discussion
• Resource requirement heuristics by task (imaging first) targetted for 4.1
  • Discussion of how to proceed with making task resource (memory, number of cores etc) aware.
  • Still issue with temp lattice calculation
  • Kumar working on helper task
  • Looking at thread locking issues and core affinity
• Other
  • Parallelize Cube imaging scatter gather (low level target for 4.1)
    • More consideration needed, possibly virtually combine planes
    • Evidence that it's improved via C++ still issue with python
    • Some parallelization
  • Expand threaded gridder case to >4 threads (not a 4.1 deliverable)
    • Sanjay looking at LOFAR approach