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

[Andy Bauer]

Hi Ufuk,

I haven't heard of any issues like this. Do you get similar behavior on the
machine when running ParaView with a separate, connected pvserver?

If you have an NVIDIA card you may be able to use their EGL libs for
offscreen rendering (i.e. no x-windows needed). See the blog post at
https://blog.kitware.com/off-screen-rendering-through-the-native-platform-interface-egl/.


Best,
Andy

On Wed, Nov 2, 2016 at 5:22 AM, Ufuk Utku Turuncoglu (BE) <
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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