[pymvpa] parallelizing permutation testing

Nick Oosterhof nikolaas.oosterhof at unitn.it
Mon Aug 25 14:27:09 UTC 2014


On 22 August 2014 13:47, Ben Acland <benacland at gmail.com> wrote:

> Is there a way to run permutation testing using multiple processes?
>

Not at the moment, as far as I know.

Currently we have parallelization in the searchlight and some of the
surface-based voxel selection code, but the code is non-unified.  A while
ago I proposed a more unified parallellization approach:

https://github.com/PyMVPA/PyMVPA/pull/109

but it would require extensive testing before it could be merged into
master.

If I remember correctly, some things broke when trying to parallelize
repeated measures because of conditional attributes that were not properly
passed through when pickling / hd5-ing the data. I don't know how this
would play out for the MC code...

Once we get to looking into the parallelization stuff, I'll try to make
sure we have a look at the MC code as well.
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