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18.04
xubuntu
cpu
32-bit
cpufreq
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URL:
https://askubuntu.com/q/1138740
Title:
How to delete CPU-stats from cpufreq?
ID:
/2019/04/27/How-to-delete-CPU-stats-from-cpufreq_
Created:
April 27, 2019
Edited: June 12, 2020
Upload:
April 8, 2024
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From: CPU frequency and voltage scaling statistics in the Linux(TM) kernel
<mysystem>:/sys/devices/system/cpu/cpu0/cpufreq/stats # ls -l
total 0
drwxr-xr-x 2 root root 0 May 14 16:06 .
drwxr-xr-x 3 root root 0 May 14 15:58 ..
--w------- 1 root root 4096 May 14 16:06 reset
-r--r--r-- 1 root root 4096 May 14 16:06 time_in_state
-r--r--r-- 1 root root 4096 May 14 16:06 total_trans
-r--r--r-- 1 root root 4096 May 14 16:06 trans_table
reset
Write-only attribute that can be used to reset the stat counters. This can be useful for evaluating system behaviour under different governors without the need for a reboot.
This should reset all the stats:
echo '1' | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/stats/reset
## ```
From: [How to use cpufrequtils][2]
### cpufreq-set
Allows setting
-d minimum frequency, -u maximum frequency, -f specific frequency (userspace governor must be set first) and -g governor on a -c specific CPU.
`cpufreq-set` needs root privileges in order to work.
Look for this in your setup:
sudo cpufreq-set -u 950MGhz
and remove it. Or add this to your setup:
sudo cpufreq-set -u 1.20Ghz
----------
From: [HowTo CpuFrequencyScaling][3]
GOVERNOR variable from /etc/default/cpufrequtils not taking effect
So, you configured the GOVERNOR variable in /etc/default/cpufrequtils and after reboot you notice by running cpufreq-info that the active governor is still "ondemand".
This may happen if you have laptop-mode-tools installed. laptop-mode configures the active governor via the following variables: BATT_CPU_GOVERNOR, LM_AC_CPU_GOVERNOR, NOLM_AC_CPU_GOVERNOR. You can override them to your liking in /etc/laptop-mode/laptop-mode.conf:
BATT_CPU_GOVERNOR=powersave LM_AC_CPU_GOVERNOR=conservative NOLM_AC_CPU_GOVERNOR=ondemand
----------
From: [Arch Linux CPU frequency scaling][4]
### Setting maximum and minimum frequencies
In rare cases, it may be necessary to manually set maximum and minimum frequencies.
To set the maximum clock frequency (clock_freq is a clock frequency with units: GHz, MHz):
sudo cpupower frequency-set -u clock_freq
To set the minimum clock frequency:
sudo cpupower frequency-set -d clock_freq
To set the CPU to run at a specified frequency:
sudo cpupower frequency-set -f clock_freq ```