[Paraview] GNOME is hanging with co-processing ...

[u.utku.turuncoglu at be.itu.edu.tr]

Hi Chris and Andy,

It is good to know that i am not alone. It is very strange issue. Are you
also using GNOME in OpenSuse? It might narrow down the issue. As i told
before, if i use strace, the problem is dissapeared. It might help to find
the source of the problem but it requires deep knowledge about OS and also
GNOME. For temporary solution, i'll try to setup offscreen rendering using
Nvidia EGL libraries.

Thanks,
Regards,

--ufuk

> Hi Ufuk,
>
> I have experienced a similar issue when trying to instrument a code with
> Catalyst. I was running OpenSuse 13.2.  I start the parallel from a
> terminal window, and the entire GUI just locks up completely. Sometimes it
> seems to be permanently stuck and I have to do that you did i.e. ssh from
> another computer and kill the process. It’s quite frustrating, and it is
> the reason that I started looking into running with osMesa as a way to
> completely stop the calls to Catalyst from opening up an x-window.
>
> I can’t really offer any solutions because I still haven’t figured out
> what is going on, but I can tell you that you are not the only one having
> that issue.
>
> Best regards,
> Chris Neal
>
> On 11/2/16, 5:22 AM, "ParaView on behalf of Ufuk Utku Turuncoglu (BE)"
> <paraview-bounces at paraview.org on behalf of
> u.utku.turuncoglu at be.itu.edu.tr> wrote:
>
>     Hi,
>
>     I am trying to run a parallel code with co-processing support but when
> i
>     run the code, it is hanging without opening x-window and writing the
> png
>     files. In this case, i could not use or interact with any other app
> with
>     GUI such as firefox, terminal etc. It seems that it affects the GNOME.
>     On the other hand, if i connect to machine remotely via ssh and kill
> the
>     MPI process than the machine back to the normal and i could interact
>     with terminal and other apps with GUI nornally. The system has Centos
>     (7.1) operating system along with ParaView 5.2.0RC3 (BTW, i compiled
>     ParaView from source). In this case, i am just running the code with
>     standard mpirun command as follows,
>
>     mpirun -np 16 ./main.x
>
>     to find the source of the problem, i included strace command to the
>     mpirun like following
>
>     mpirun -np 16 strace ./main.x
>
>     and it runs without any problem and produces desired output. So, at
> this
>     point i am little bit confused and i just wonder that is there anybody
>     else had similar issue before. Strace somehow solves the problem but i
>     don't know how. It seems that it is related with the system because
> same
>     code runs without any problem under MacOS. I also compiled code with
>     ParaView 5.1 and it also hangs. The standard allinputsgridwriter.py is
>     working without any problem and writes the data to disk. So, somehow
> it
>     is related with the system (probably GNOME) or the ParaView
> installation.
>
>     Another question is that is there any way to prevent opening x-window
>     and still getting advantage of having GPU in this case? The code only
>     writes the result in png format. So, i need installation for headless
>     server (without any screen attached) but i am not sure. I think that
> it
>     requires special configuration options for the ParaView installation.
>     So, please let me know also about those special options.
>
>     Regards,
>
>     --ufuk
>
>
>
>
>
>
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