[pymvpa] Never-ending searchlight

[Thomas Nickson]

Hello All,

I have also had this problem I think. I gave up after about a month. I
though that it was just computationally prohibitive with 133 subjects but
is this not the case?

I can run it and contribute debug data if you want as I'm still interested
in the analysis.

Thanks,

Tom

On Fri, Jan 30, 2015 at 12:18 AM, Christopher J Markiewicz <effigies at bu.edu>
wrote:

> On 01/29/2015 04:35 PM, Yaroslav Halchenko wrote:
> >
> >
> > On Thu, 29 Jan 2015, Christopher J Markiewicz wrote:
> >
> >> At commit: 573883e099a598c127fc5076123ebe3906f2be82
> >
> > $> git describe 573883e099a598c127fc5076123ebe3906f2be82
> > upstream/2.3.1
> >
> >
> >> Running into a weird issue where under one (of 120) combination of
> >> parameters, the searchlight hangs and never ends. On a 16 core machine,
> >> 16 cores will run for about 1.5-2 hours, and then one core will be at
> >> 100% until terminated (longest run was ~3 weeks, having forgotten about
> >> it over break).
> >
> > might well be that SVM got stuck somehow?
> >
> > what if you set nproc=1 (no parallelization), and
> >
> > debug.active += ["SLC", "SLC_"]
> >
> > so you see what is going on atm -- where would it get stuck?
>
> Thanks for the tip. That's going to take some time to get to the point
> where it's stuck (estimating another 6 hours).
>
> Weirdly, though, one of my attempts to run this finally worked (probably
> been ~20 attempts). I'll let the single thread run to see if it sticks
> and maybe figure out why.
>
> --
> Christopher J Markiewicz
> Ph.D. Candidate, Quantitative Neuroscience Laboratory
> Boston University
>
>
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