Yes, I'm working with containers, only its Singularity HPC and not Docker,
which makes some things more complicated (and some less).
So, to get back to the original question: If I don't run the vglclient, are
the correct steps the following?
1) Get the headless 3D X server running on :0 (should be quite easy once
the cluster admin agrees to do that)
2) Each user runs:
xvfb-run -a -s "-screen 0 1920x1080x24" env VGL_DISPLAY=:0 vglrun
/path/to/app arg1 arg2 ...
I tested this on my (non-headless) laptop and it seemed to work:
No window popped up, so apparently :0 wasn't used. And nvidia-smi showed
that the GPU is being fully utilized. In glxgears, I get around 700 FPS on
my GeForce GTX 1050 via VGL compared to 3000 FPS with direct on-screen
rendering, but that's probably okay, we'll see when I test the full-blown
apps.
If this approach is correct for this use-case, could I help making a part
of documentation from it? We could also add the server-side setup part
Jason posted.
Dne pondělí 24. srpna 2020 v 16:57:49 UTC+2 uživatel DRC napsal:
> Yes, that is exactly what VirtualGL does, but the VirtualGL Client is not
> a required component of VirtualGL. The VirtualGL Client is only used if
> you use the built-in VGL Transport, which is only useful in a remote X
> environment (i.e. when the 2D X server is on the client machine.) Most
> users use VirtualGL with an X proxy these days, in which case the VirtualGL
> Client is not used.
>
> Apart from that, it sounds like what you are trying to accomplish is the
> same as https://github.com/VirtualGL/virtualgl/issues/98: sharing the 3D
> X server connection from host to guest in a container environment such as
> Docker.
> On 8/24/20 9:15 AM, Martin Pecka wrote:
>
> As the GPUs are shared among more users, I find it useful to give a
> separate (but still accelerated) X display to each user. I suppose telling
> everybody to use :0 wouldn't end up very well (as long as everyone would be
> rendering offscreen, it'd work, but I can't guarantee that). So I thought
> that VirtualGL could be the thing that would guarantee that nobody will be
> rendering onscreen.
>
> Dne pondělí 24. srpna 2020 v 16:02:20 UTC+2 uživatel DRC napsal:
>
>> I don't fully understand what you're proposing. The 3D X server part of
>> your proposal should be no problem, as long as you connect each GPU to a
>> separate screen on that X server (presumably, the 3D X server would be
>> headless.) But why is the VirtualGL Client involved?
>>
>> Conceptually, it should be possible to share the 3D X server connection
>> with, say, a Docker container, but given the extremely limited resources
>> of this project, I have thus far been unable to dedicate the time toward
>> researching how best to accomplish that
>> (https://github.com/VirtualGL/virtualgl/issues/98).
>>
>> On 8/21/20 7:44 AM, Martin Pecka wrote:
>> > Hi, we're thinking about getting GLX support on our HPC cluster which
>> > (currently) is completely headless. The idea is that users should be
>> > able to run virtual containers which would be given access to HW
>> > rendering with OpenGL. EGL would be better, but we're stuck with OGRE
>> > rendering engine which doesn't have proper support for the nvidia EGL.
>> >
>> > Could you comment on my idea? Is it a supported scenario?
>> >
>> > The multi-GPU server would run a single "3D X server", probably Xorg.
>> > It would also run the virtualgl client. Containers that want to do
>> > some OpenGL stuff would call a combination of xvfb and vglrun. I.e.
>> > the whole setup only works with a single machine, not a pair connected
>> > via ssh -X.
>> >
>> > Is that possible? Is there a tutorial for this kind of setup?
>>
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