I'm on an ARM board running Linux. The hardware is a vehicle domain control board which has 6 core ARM Cortex-A78AE and some machine learning cores. I don't want to reboot it because It might be a hardware or driver bug? which might be the reason that causes my performance loss issue.
root@hobot:~# uname -a Linux hobot 6.1.94-rt33 #1 SMP PREEMPT_RT Fri Nov 8 15:11:35 CST 2024 aarch64 GNU/Linux I don't know what happend with my OS today, I just suddenly found out that shell commands takes too long to finish. but everything was fine a little while ago.
like: 
As you can see, ls takes about over 5 seconds and it takes 100% CPU in core 4th.
I tried strace with ls. It get stuck in nothing.
What should I monitor to find out what happened?
