Which kernel version is best for real time?

PCW wrote:

Yes PCW, is the same Realtek with dkms driver for fix latency.
Maybe I'm asking the wrong question: is it really necessary to do the test with YouTube?

When you get an error, what does:

halcmd show param *.tmax

(typed in a terminal)

show?



 

wrote:

Did ya set the governor to performance?

Try to remove unnecessary hardware.

blacklist kernel modules of unneeded devices.

Mask and disable unneeded services.

Ensure you have plenty of RAM; disk I/O should be avoided as much as possible.

Caching and buffering will reduce disk I/O and latency, but requires ample free RAM.

PCW wrote:

Warning: Spoiler!

When you get an error, what does: halcmd show param *.tmax (typed in a terminal) show? This will help determine where the fault lies

PCW wrote:

  33  s32   RW       16640759  remora.read.tmax

I don't know the CPU clock frequency but if it's say 3 GHz, this is ~5 ms
so if you have a 1 ms servo thread, you are likely dropping packets

This indicates a network latency issue.

So possible the DKMS patch did not apply or there is still something
remaining wrong with the network setup.

I would run the ping test again, as it will show these issues clearly

sudo chrt 99 ping -i .001 -q -c 60000 10.10.10.10