[Yt-dev] QuadTree projection now works in parallel

John Wise jwise at astro.princeton.edu
Thu Jun 2 13:24:32 PDT 2011


Nice work, Matt!

> pf.h.proj = pf.h.quad_proj

Clever trick.  I didn't think about doing this before when running QuadProj in serial before.

I just tested it on pleiades on 128 processes on a large nested grid simulation.  The run time decreased from 348s to 104s.  Very nice.  There were no errors, but there were some lingering RECV/SEND debugging messages.  Here are the stats on the dataset.

level   # grids     # cells
---------------------------
  0        512    134217728
  1        850     25412184
  2       1229    140608000
  3      13775    283353768
  4      41136    195020184
  5      29687     74512760
  6      14847     17540640
  7       4104      3998824
  8        527      1099896
  9         10         6984
----------------------------
        106677    875770968

John


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