topic i.MX8M Plus CPU current frequency dynamic running in i.MX Processors

i.MX8M Plus CPU current frequency dynamic running

Maotom — Fri, 01 Aug 2025 01:34:06 GMT

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?

Re: i.MX8M Plus CPU current frequency dynamic running

pengyong_zhang — Mon, 04 Aug 2025 02:40:47 GMT

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

Re: i.MX8M Plus CPU current frequency dynamic running

Maotom — Fri, 08 Aug 2025 08:42:36 GMT

Re: i.MX8M Plus CPU current frequency dynamic running

Maotom — Fri, 08 Aug 2025 08:43:28 GMT

Got it,Thanks