I'm trying to install LinuxCNC on Ubuntu 20.04 arm64 and encountering some issue

I'm trying to install LinuxCNC on Ubuntu 20.04 arm64, and everything went smoothly with compiling from the source code. However, I'm currently stuck at the real-time kernel part. I hope to receive your help and guidance on this matter.

The current system information is as follows:
1、 uname -a
Linux ubuntu 4.14.87 #1 SMP PREEMPT Mon Jun 19 19:21:00 CST 2023 aarch64 aarch64 aarch64 GNU/Linux
2、uname -r
4.14.87

Everything went smoothly with compiling from the source code.

 

The real-time performance is very poor.

 

How should I proceed?
 

The embedded development board I'm using has some documentation that instructs us on how to build the kernel and image, but it doesn't seem to address the issue: github.com/HorizonRDK/rdk-gen

Ubuntu requires a subscription for the RT kernel. Please use Debian Bookworm per these instructions
linuxcnc.org/docs/2.9/html/getting-start...etting-linuxcnc.html

Compiling from source is not required.

I also wish to use Debian BookWorm. However, I am currently limited by the development board I am using. If I install Debian BookWorm on this board, I anticipate that it won't be able to boot.

Please advise what your hardware is. As Tommy observed, it does not appear to be a pi which show up as ARM64..
The kernel you have used seems to be very old. 

This issue with the device has been resolved. I will share the refined solution later on.