Targets/tasks for May 11th - 18th

  • For next monday some description of memory consumption

Discussion/Agenda

  • Memory requirements in imaging
    • Total memory scaling is generally understood
    • Need to compare expected memory use with actual use (Jim has some instrumentation in place) (target)
    • Need to understand better how temp image selection works, whether it's correct and how to modify it for parallel cases (target)
  • Describe and implement engine vs threaded gridder determination as a function of memory
  • Update on Partitioning status (null selections, non-conforming tasks) Jeff
    • First tasks being implemented (flagger, calibration), some read in parallel, all can read serially, writers are still problematic
    • Re-examination of Parallel-go for cluster specification (cores vs engines, memory)
  • Model data tests
    • James to get with Kumar
  • Memory resident subtable tests James
    • Check that it affects number of FDs as well
  • Spectral imaging tests James
    • Understand channel chunk choice effect on performance James

CASA HPC Initiatives for the 3.5 Cycle

  • Tentative list from last meeting
    • Reduce in memory requirements during imaging
    • Parallelize multi-field imaging
    • Parallelize MFS terms > 1 in the gridding step
    • Parallelize Cube imaging scatter gather
    • Expand threaded gridder case to >4 threads
    • Implement core affinity for threaded gridder case (first out)
    • Parallel framework (partitioning, parallel go) work in ESO
    • Filler to write a MMS in parallel

Deferred Topics

ARDG Targets

-- JamesRobnett - 2012-06-18
Topic revision: r1 - 2012-06-18, JamesRobnett
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