[yt-users] Error in simple volume rendering

[Daniel Fenn]

Hi Sam,

Sorry for the delay. It's been a while since I had the time to work on
this. Changing the center and width didn't work. Interestingly, changing
the number of mpi processes did. I was originally using 24 processes, and
it was failing when the value of bottom_id in the
function get_reduce_owners() in amr_kdtree.py reached 32.

I did some testing, and it always worked when I used 16 processes or less.
Sometimes higher numbers would work, but that depended on the input file.
For instance, with one input file, it worked on 18 processes, but with a
different input file, it didn't. Both the input files I tested were Flash
hdf5 files, but with different levels of refinement.

Also, I'm not sure if this is related, but when I'm using the ipython
notebook and I try to do

if yt.is_root()
     cam.show()

or

if yt.is_root()
     cam.snapshot()

these both cause the engines to hang. I can call cam.show() or
cam.snapshot(), and they work just fine, as long as I'm calling it on all
processes. But as soon as I restrict to to just root, it hangs.

I appreciate any help you could give me. For now, I'm just making sure to
only use 16 processes, but that doesn't seem like a good long-term solution.

Thanks,

Daniel


2014-11-03 15:42 GMT-05:00 Sam Skillman <samskillman at gmail.com>:

> Hi Daniel,
>
> Could you try a different center and width argument?  Something like:
> c = ds.domain_center
> W = ds.domain_width.max()
>
> Sam
>
> On Fri Oct 31 2014 at 5:49:23 AM Daniel Fenn <dsfenn at gmail.com> wrote:
>
>> Hi,
>>
>> I'm trying to do the simple volume rendering from the cookbook. The data
>> is FLASH HDF5 data, and I'm using version 3.0.2 of yt. The script I'm
>> running is here:
>>
>> http://paste.yt-project.org/show/5183/
>>
>> However, I'm getting the following error:
>>
>> http://paste.yt-project.org/show/5184/
>>
>> I guess it has something to do with the AMR tree, but unfortunately I
>> don't know a lot about the specifics of that.
>>
>> Could anyone offer any insight into this problem?
>>
>> Thanks,
>>
>> Daniel
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>>
>
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