[Mesa-users] X11 forwarding issue

[Ruslan Kabatsayev]

Hi,

On Thu, 26 Mar 2020 at 12:16, Pekka Paalanen <ppaalanen at gmail.com> wrote:
>
> On Thu, 26 Mar 2020 08:13:07 +0100
> Guillermo Hazebrouck <gahazebrouck at gmail.com> wrote:
>
> > Hi Pekka,
> > If I get it right, what you say is that NVIDA might then be able of
> > forwarding the buffers (in version 2.0 as Michael said) without caring
> > about the GLX library?
>
> Hi,
>
> I'm saying that NVIDIA provides its very own GLX library that might
> do more or different things than the FOSS GLX library you would
> otherwise use.
>
> > I don't agree that transmitting video is always more efficient.
>
> Of course not always. But there does not seem to be much attention to
> cater for those cases where video transmission is not the best option.
>
> A lot of performance work is driven by games. The rest is driven by
> desktop apps which usually nowadays submit images. In my experience it
> is really rare to see an application that would benefit from command &
> data submission - be that X11 or other protocol.
>
> For what I've tested, GTK+2 apps seemed to work nicely with X11
> forwarding. GTK+3 apps are painfully slow because they saturate the
> available network bandwidth I had available.

Actually, the same slowdown can be seen in Qt4 to Qt5 transition. In
Qt4 you could use the "native" graphics system, which issued drawing
commands and was light in X11 forwarding use cases. Qt5 always uses
"raster", which leads to unusable GUIs with X11 forwarding from slow
machines (Raspberry Pi Model B) or over slow networks.
So this seems to be a general trend of ditching X11-over-network use cases.

>
> > I get the feeling that only a few people are interested in efficiently
> > exporting through the network nowadays, so the development is going in a
> > different direction. Also, the bandwidth has become less critical for most
> > people, so probably no one care. However, there are still some areas where
> > keeping a quite network is considered very important.
>
> Indeed, I agree with you there.
>
> Every once in a while I see someone complaining about thin-client or
> other network remote performance issues, but it never seems to lead
> anywhere.
>
> Then there are Web apps and WebGL, which seem to be the modern
> "thin client" replacement.
>
>
> Thanks,
> pq
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Regards,
Ruslan