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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: enter image description here

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.

enter image description here

What should I monitor to find out what happened?

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  • What exact OS config are you running? Have you rebooted? What temperature is the CPU? Commented Feb 23 at 7:03
  • @VlastimilBurián Hi, Thanks for your reply. The hardware is a vehicle domain control board which has 6 core ARM Cortex-A78AE and some machine learning cores. I literally didn't reboot because I'm working on the performance loss on this board, I'm afraid I can not reproduce the same issue, so I need to figure out what happened. Commented Feb 23 at 7:35
  • I might not understand now. Please explain if you don't want to or cannot reboot that Arm64 computer? Commented Feb 23 at 7:38
  • @VlastimilBurián lm-sensors didn't show up cpu tempretures, and I don't know what is "OS config" mean. Commented Feb 23 at 7:41
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    put_data_tofifo failing may be the actual reason for a lot of interrupts, but here my knowledge ends I'm afraid Commented Feb 23 at 8:34

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