hev

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  1. [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
  2. 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.
  3. @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
  4. 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