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Casa Parallelization meeting minutes: Monday 1 April 2013

Attendees: Jeff, James, Jim, Brian, Kumar, Sanjay

Review of Priorities:

  • Benchmarking the pipeline
  • Under IO Shape and Size: Add Lazy Filler testing
  • Removal of Scratch Columns

Progress on Current Development Targets

  • Kumar: MMS and Model Column
  • Kumar: Tile Size for Temp Lattice

Benchmarking / Profiling

Results

  • Kumar: Memory Consumption for 4 Pol. narrow band continuum imaging w/ Brigg's weighting.
Npix*1.44 PagedImage TempImage  
1000x1000 3.5GB 3.5GB  
2000x2000 3.5GB 3.5GB  
3000x3000 4GB 4GB  
4000x4000 4GB 5GB  
5000x5000 5.1GB 6.5GB  
6000x6000 7.5GB 9.5GB  
7000x7000 11GB 12.5GB  
8000x8000 14GB 18GB  
9000x9000 18GB 21GB 9000*9000*4*24*1.44+3*4*9000*9000*4=15GB
    • 2 Grids (1 Double Complex, 1 Single Complex) * Pol * (1.2 Padding on each axis)^2 + Residual + PSF + Model
    • We should not have both the left and right terms in memory at the same time.

Requests

  • IO Profile of ALMA pipeline

AOB

  • NVIDEA Visit

-- JeffKern - 2013-04-01
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