[Paraview-developers] Paraview server in MultiGPU environment

[Dan Lipsa]

On Mon, Nov 14, 2016 at 11:45 PM, Khayam Gondal <khayam.gondal at gmail.com>
wrote:

> Hi.
> I have two NVIDIA K40m GPUs installed on server (48 CPU cores). I have
> compiled and installed Paraview server with MPI support and using NVIDIA
> Drivers.
>
> I use following command to start pvserver
>
> mpirun -bynode -np 24 bin/pvserver --disable-xdisplay-test
> --egl-device-index=1 : -np 24 bin/pvserver --disable-xdisplay-test
> --egl-device-index=0
>
>

I think the connection information reported is only for node 0.
You can try changing the source code vtkEGLRenderWindow::SetDeviceAsDisplay
and printing the device index from there. You should get a printout with
the device index for every node.

Maybe we should have a way to report the opengl info for evey node,
including the device index.


> But I don't now how to check that pvserver is actually using *both *of
> the GPUs not just one.. Actually If I change the --egl-device-index value
> to a random number like 8 or 9, server still starts up and client got
> connected to it.
>

This is because if the device index is bigger than the number of devices it
uses device 0.

Dan






>
> *Output of nvidia-smi*
>
> khayam at node-0:~$ nvidia-smi
> Mon Nov 14 23:41:08 2016
> +-----------------------------------------------------------
> ------------------+
> | NVIDIA-SMI 367.57                 Driver Version: 367.57
>    |
> |-------------------------------+----------------------+----
> ------------------+
> | GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr.
> ECC |
> | Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute
> M. |
> |===============================+======================+====
> ==================|
> |   0  Tesla K40m          Off  | 0000:02:00.0     Off |
>  0 |
> | N/A   19C    P0    63W / 235W |      0MiB / 11439MiB |      0%
>  Default |
> +-------------------------------+----------------------+----
> ------------------+
> |   1  Tesla K40m          Off  | 0000:82:00.0     Off |
>  0 |
> | N/A   20C    P0    65W / 235W |      0MiB / 11439MiB |    100%
>  Default |
> +-------------------------------+----------------------+----
> ------------------+
>
> +-----------------------------------------------------------
> ------------------+
> | Processes:                                                       GPU
> Memory |
> |  GPU       PID  Type  Process name                               Usage
>    |
> |===========================================================
> ==================|
> |  No running processes found
>     |
>
> *Snapshot of Paraview About (*It is showing K40m as remote renderer but
> is it using both GPUs or just one?)
>
>
> *[image: Inline image 1]*
>
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