RaspberryPi 3: remote axis display?

I am just playing around with my RPi3B (not the+ version). Kernel rpi-4.19.y-rt. As with all RT-PREEMPT builds latency is depending on the relation of servothred to basethread, i.e. basethread 50000 gets a latency < 25000, while 65000 gets < 55000.

Now running linuxcnc on X11, I get

Unexpected realtime delay on task 0 with period 50000
This Message will only display once per session.
Run the Latency Test and resolve before continuing.
Unexpected realtime delay on task 0 with period 50000
This Message will only display once per session.
Run the Latency Test and resolve before continuing.

Shutting down and cleaning up LinuxCNC...
task: 2129 cycles, min=0.000049, max=0.034770, avg=0.010206, 0 latency excursions (> 10x expected cycle time of 0.010000s)
Note: Using POSIX realtime

But I still get a realtime error message on the display. ( Does anybody know what causes this message? )

Anyway, when I run the GUI remote over ssh -X ..., I do not get any trealtime error message - but the 3D preview is "a bit" sluggish.

So the question: Does anybody k now how to run axis on my local computer and make it control the romote axis (or linuxcnc) instance?

insert the DVD iso start from Your PC as live and try the machie from there
the error you get is as Ferror i think yoiu shoudt use a 100000 base in first place
even if the latency jumps to 200k it will give you a stepper setup at max 3m/min at 100steps/mm
We got crappy PC here and they run since long time on this setup dayly

Nothing wrong whit th machine config, it works fine from PC

The realtime error occurs immediately after starting axis, even before the machine is turned on, but it does not occur over ssh. I think it's the GPU that causes trouble, so I'd like to run the axis GUI-part on my PC and the controlling part on the RPi.

Well, I use GPIO - that's the whole point of using the RPI3 anyway. And as said, without X11 on local display the RPi3 can handle a base thread of 50000. Anyway, this is not the (main) problem. That is still: can axis on my local PC be used to control axis on rpi? in docs indicate that it works, but miss thze importent part of "how".

LOL .. probably lost in translation "axis-remote" is not what I want: I do not want to control a remote GUI from a local commandline. I want a local GUI to control the remote machine. Network latencies is not the problem, as only the GUI part is seperated over network.

To clearify: what kills latency on the RPi3 is opengl, not the usb-stuff.

I just came across "linuxcncrsh", but I still need a way to connect "some" gui -preferably axis - to it. Any idea?

Yes, this definitly works, but I also loose 3D acceleration in the preview window. What I would like to get working is a local axis instance with accelerated 3D preview on a non-realtime computer, that connects to a linuxcnc instance without OpenGL display on a RaspberryPi.