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

[Christopher Neal]

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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