[yt-users] Problem when run yt dev in parallel on Blue Waters

[Nathan Goldbaum]

Hi Pengfei,

Can you try to run the following test script in parallel? This will
determine if the issue is on the yt side of things or the mpi4py side of
things:

    from mpi4py import MPI

    print(MPI.COMM_WORLD.rank)

-Nathan

On Wed, Nov 18, 2015 at 5:36 PM, Pengfei Chen <madcpf at gmail.com> wrote:

> Hi all,
>
> I have trouble running yt in parallel on Blue Waters. I installed yt using
> miniconda, the version of yt is
>
> ~/miniconda/lib $yt version
> yt module located at:
>
> /u/sciteam/madcpf/miniconda/lib/python2.7/site-packages/yt-3.3.dev0-py2.7-linux-x86_64.egg
> The current version and changeset for the code is:
> ---
> Version = 3.3-dev
> Changeset = 90f900be7a36+ yt
>
> Then with miniconda/bin in PATH I installed mpi4py-2.0.0. But when I tried
> to make the following simple output in parallel, I get:
>
> import yt
> yt.enable_parallelism()
> from yt.utilities.parallel_tools.parallel_analysis_interface import\
>  parallel_objects, communication_system
>
> comm = communication_system.communicators[-1]
> print comm.rank, comm.size
>
> 0 1
> 0 1
> 0 1
> 0 1
> 0 1
> 0 1
> 0 1
> 0 1
> ...
>
> When I run a similar code but with yt-2.x also on Blue Waters, I get what
> I expect:
>
> 7 16
> 15 16
> 6 16
> 9 16
> 11 16
> 8 16
> 0 16
> 4 16
> ...
>
> I'm confused about it. Could anyone give me some suggestions please?
>
> Thanks,
> Pengfei
>
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>
>
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