hev

[heiher@hev-sbc ~]$ uname -a Linux hev-sbc 5.9.1 #1 SMP Sun Oct 18 17:37:19 CST 2020 aarch64 GNU/Linux [heiher@hev-sbc ~]$ cat /sys/devices/system/cpu/cpufreq/*/scaling_available_frequencies 408000 600000 816000 1008000 1200000 1416000 408000 600000 816000 1008000 1200000 1416000 1608000 1800000

Is it possible that A53 (little) can not run at the highest design frequency (1.51GHz)? I configured the A53 to 1.42GHz and the A72 to 1.8GHz, which looks good. I also have a NanoPi M4V1, it's running the official mainline kernel 5.9.1, and the kernel default configuration is 1.42GHz+1.8GHz, and I have never found stability problems.

@Pedro Lamas I don't use this to config. my config equivalent to: echo 1416000 > /sys/devices/system/cpu/cpufreq/policy0/scaling_max_freq echo 1800000 > /sys/devices/system/cpu/cpufreq/policy4/scaling_max_freq echo performance > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor echo performance > /sys/devices/system/cpu/cpufreq/policy4/scaling_governor

I found the same problem, NanoPi M4V2 randomly panic. after CPU frequency reduction, it seems to be fixed. heiher@hev-mpc:~$ cat /sys/devices/system/cpu/cpufreq/policy0/scaling_max_freq 1416000 heiher@hev-mpc:~$ cat /sys/devices/system/cpu/cpufreq/policy4/scaling_max_freq 1800000