i.MX8M Plus CPU current frequency dynamic running

[Maotom]

Hi

The script can check i.MX8M plus current running frequency by " sudo cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq". There are 3 kinds available freqencey  1200000, 160000  and 1800000 shown by command "cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies". After check current frequency second by second found the CPU frequency run between  1600000 and 1800000 

2025-Aug-01_09:27:17 CPU 52000
1600000
2025-Aug-01_09:27:18 CPU 52000
1600000
2025-Aug-01_09:27:19 CPU 52000
1600000
2025-Aug-01_09:27:20 CPU 52000
1800000
2025-Aug-01_09:27:21 CPU 52000
1800000

What is the policy for CPU frequency dynamic running?

i.MX8M 

[pengyong_zhang · Accepted solution]

Hi @Maotom 

Scaling governors are used in the Linux kernel to set the CPU frequency. CPU frequencies can be scaled
automatically depending on the system load either in response to ACPI events or manually by userspace
programs. For more information about governors, read governors.txt from www.kernel.org/doc/Documentation/
cpu-freq/governors.txt.

B.R

[Maotom]

Got it,Thanks