[yt-users] seg fault in Quadtree

[Matthew Turk]

Hi Britton,

CFLAGS=-O0

and then forcing a rebuild.  Almost *always* this comes from domain
weirdness -- as in, having projected data that goes past DRE or DLE in
your sim.  Is this a particle dataset, like Rockstar or halos?

-Matt

On Thu, Feb 27, 2014 at 11:42 AM, Britton Smith <brittonsmith at gmail.com> wrote:
> Hi Nathan,
>
> I'm having a hard time getting a traceback that goes into the QuadTree
> source.  The seg fault I get stops at QuadTree.so.  Is there a way to
> recompile this in debug mode to get some more information?  It doesn't look
> like pdb is able to step into QuadTree either.
>
> Britton
>
>
> On Thu, Feb 27, 2014 at 5:22 PM, Nathan Goldbaum <nathan12343 at gmail.com>
> wrote:
>>
>> Hi Britton,
>>
>> Can you get a traceback from the seg fault?  It would help to see the line
>> number in the autogenerated QuadTree.c where the crash happens.
>> Autogenerated C files produced by cython reproduce the original .pyx files
>> line by line as comments so it's usually pretty easy to back out where the
>> crash is happening in the original Pyrex file.
>>
>> Nathan
>>
>>
>> On Thursday, February 27, 2014, Britton Smith <brittonsmith at gmail.com>
>> wrote:
>>>
>>> Hi all,
>>>
>>> I'm trying to make projections of a rather large Enzo dataset and getting
>>> a segfault somewhere in Quadtree.so.  This dataset is ~230 GB in size with
>>> 27 levels of AMR.  As far as I can tell, the only hard coded limit I could
>>> find in QuadTree.pyx is for 80 levels, which I am clearly below.  Does
>>> anyone familiar with this part of the code have any idea if there are any
>>> other hard-coded limits in here that I might be exceeding?  If not, does
>>> anyone have any advice for how I might debug this?  I'm seeing this behavior
>>> in both yt-2.x and yt-3.0, so it does seem to be something intrinsic to the
>>> quadtree code.
>>>
>>> Thanks!
>>> Britton
>>
>>
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