[pymvpa] Never-ending searchlight

Christopher J Markiewicz effigies at bu.edu
Fri Jan 30 00:18:35 UTC 2015

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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