I used the official OTA method to update and downloaded several packages using apt.
And I also came up with a way to solve the problem of A/B partitioning, and in the end, there were no errors during the installation.
The command I am using:
sudo apt-get install rt-tests
Then I conducted a delay test and found that no matter how I ran it, the effect was the same as that of the primary kernel.
The delay is still significant. I have set it to maximum power consumption and clock frequency.
sudo nvpmodel -m 0
sudo jetson_clocks
But I have seen many test results online, and their effectiveness is very good