[yt-dev] Parallelization & the ART frontend

[Christopher Moody]

Hi guys,

I've been working hard on the ART frontend. Lately, I'm to the point where
I'm playing around with more complex datasets that are taking much longer
to project - so I'd really like to to start using the parallelization
engines. I've tried Sam's workshop parallelization demos, and they all
work. But launching with the ART frontend (
http://paste.yt-project.org/show/2152/) spawns many independent processes
which evidently are not actually splitting the projection job, but still
taking up lots of processors.

My mpi installation  works:
yt : [INFO     ] 2012-02-07 18:12:28,207 Global parallel computation
enabled: 0 / 8yt : [INFO     ] 2012-02-07 18:12:28,207 Global parallel
computation enabled: 2 / 8
yt : [INFO     ] 2012-02-07 18:12:28,208 Global parallel computation
enabled: 1 / 8
yt : [INFO     ] 2012-02-07 18:12:28,208 Global parallel computation
enabled: 6 / 8
yt : [INFO     ] 2012-02-07 18:12:28,208 Global parallel computation
enabled: 3 / 8
yt : [INFO     ] 2012-02-07 18:12:28,208 Global parallel computation
enabled: 4 / 8
yt : [INFO     ] 2012-02-07 18:12:28,208 Global parallel computation
enabled: 5 / 8yt : [INFO     ] 2012-02-07 18:12:28,209 Global parallel
computation enabled: 7 / 8

But the script is just run 8 times, not any faster.

What am I missing here?

Many thanks!
chris
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