[Numpy-discussion] Error in deallocation ?

Matthieu Brucher matthieu.brucher@gmail....
Wed Oct 17 08:04:12 CDT 2007

Oups, I'm wrong, the process happened this time with the 128² images and not
the 3D images. I'll try to check a little bit further.


2007/10/17, Matthieu Brucher <matthieu.brucher@gmail.com>:
> Can't you emulate this behaviour with signals different than images ?
> > (say random signal of 64*64*64*3 samples).
> I wish I could, but this behaviour only shows up on this peculiar data set
> :(
> If the process does not
> > require a long processing time (say a couple of minutes), then you may
> > be able to use massif tool from valgrind, which may be helpful to detect
> > too many INCREF. For DECREF, then the default memory checker from
> > valgrind should be useful as well.
> >
> > If it does take only a couple of minutes, it is then relatively easy to
> > "bisect" the code to spot the error (once you get through the C level,
> > it is easy to see the problem, if you can reproduce it, in my
> > experience).
> Unfortunately, the process is very long, there are several optimizations
> in the process, the whole thing in a EM-like algorithm, and the crash does
> not occur with the first image, it is later.
> Matthieu
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