Raspberry Pi 4

If you start LinuxCnc from a terminal, do you see

Running POSIX realtime

Or does it say non realtime ?

I am rather sure it said POSIX non realtime. This one says while my "production" machine says
Not a very good test I am afraid. I'll start googling later in the evening.

Edit: There are actually brances with rt patches at github.com/raspberrypi/linux , called rpi-4.19.y-rt, I am using rpi-4.19.y. I will compile the rt version and give it a go.

Well, the route with "rpi-4.19.y-rt" didn't work. What works is to start with the "rpi-4.19.y" branch and apply the usual rt patches.
I now got this
and a latency_histogram that looks like this, after some random surfing on the net.


I will have to wait until tomorrow with actual test. I am pretty sure it will run (somewhat).

And to newbynobi, you have a line "import vte" in gmoccapy line 39, is that actually used? "buster" doesn't have a suitable package python-vte.

A servo thread only plot would be interesting

After some torture


I guess that's it then.

People have achieved better than that with the Pi3. so I think that there may be room for improvement.

Try here; github.com/guysoft/RealtimePi