Dear Sir/Mrs.

We use the systems of the processor i7 CPU, 4.001GHz, 4 cores: 4 threads, 4 hyper threads.
We run programs that utilize the multi-core 8 cores nearly 100%. We want to dynamically control the clock frequency. We saw that the folder/sys/devices/system/cpu/
holds for each CPU the frequencies. We saw also that each CPU. cpu0/cpufreqthe max_freq and min_freq are set to the same value 4100000(4.1GHz).

We have a UBUNTU and Red-Hat Enterprise Linux computers.
Our questions:
1. What is the lowest frequency that can be set to min_freq?
2. We want to control dynamically these values, while we run our application not as a super user/root?
3. Can we edit the file /sys/devices/system/cpu/cpu0/cpufreqthe max_freq?

Best regards,
Yehuda

I posted a few scripts on cpu governing in this thread a moment ago, feel free to look at them and decide if they can help you too.

https://www.linuxquestions.org/quest...at-4175651885/

Depends if you use a frequency-scaling software, most prominently cpupower or cpufreq. These will overwrite and use info in /sys.

Both those have a function called "info", which shows available frequencies and max and minimum. This information is gathered from /sys/devices/system/cpu, specifically in your case /sys/devices/system/cpu/cpuX/cpufreq/. <-- symlink to /sys/devices/system/cpu/cpufreq/policyX/.

You can edit things through /sys, yes.

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