To see the minimum, current and maximum frequency of the processor cores, execute the command:
grep '' /sys/devices/system/cpu/cpu0/cpufreq/scaling_{min,cur,max}_freq
For example, in my case, the following is displayed:
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq:800000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq:907482
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq:4000000
You can also look like this:
cat /proc/cpuinfo
cpupower monitor
cpupower -c 0 frequency-info
On idle servers, there is probably no point in raising the minimum frequency of the processor cores, but on heavily loaded ones, such as the access server for example, I usually increase, because the processor is constantly loaded, jumping frequencies only hinder and judging by the graphs after the changes, the load on the processor decreases noticeably.
To set the minimum frequency for all processor cores to the same as the maximum, create a script with the code below and execute it:
#!/bin/bash
cpucount=$(grep -c 'model name' /proc/cpuinfo)
sysdir=/sys/devices/system/cpu
for cpu in $(eval echo cpu{0..$((cpucount-1))}); do
cat $sysdir/$cpu/cpufreq/scaling_max_freq > $sysdir/$cpu/cpufreq/scaling_min_freq
done
See also my article:
Changing CPU Scaling Governor on Linux