Hi guys, I hope this is the right place to report an issue We are linuxcnc users and as such we are long term users of PREEMPT_RT on x86 (and some other platforms) A number of PC's in use by our members have recently been experiencing excessive Real Time network latency since the 5.10 kernel and above. We are excited to see this seems to have been mostly resolved with the 6.3 kernel compiled from patched kernel.org source. But we are also experiencing excessive Real time network latency on some NIC hardware, mostly with Realtek NIC's in this list. https://www.realtek.com/en/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit-ethernet-pci-express-software Many modern industrial PC's are using Realtek NIC drivers that cannot be changed out so this is a problem for us. It's our understanding that the R8169 kernel driver module should provide support for this hardware. It does indeed do this but real time network latency is unacceptable. Debian offers a R8168-dkms driver. I understand it is being deprecated in favor of the R8169 kernel module driver. Installing the R8168-dkms driver on the 6.3 kernel improves RT network latency/jitter by 400% over the R8169 driver. We are users not kernel developers. How can we escalate this issue so acceptable RT performance is restored? end -Regards -Rod Webster
