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I am hoping to find help in turning off my CPU Frequency Scaling, as it is interfering with my recording studio sessions. I have only been using linux mint for a month, but I do know a couple codes for the terminal. If anyone could help me with the terminal codes to turn off my CPU Frequency Scaling and any help/advice is very welcome.
THANKS EVERYONE, PROBLEM IS SOLVED NOW
Last edited by sudo1; 01-07-2019 at 11:13 PM.
Reason: Closing this thread now....
I do have a two scripts/methiods to scale the CPU keeping it at a temp the user wants. but you seem to want pedel to the metal?
CPU Frequency Scaling, it is used to stop burn out of CPU, it is automatied by ( someone correct me if I am wrong) the CPU, and system board (MB) , and OS control this. If the CPU over heats the CPU is made to scale down so the CPU can cool down so the CPU will not burn up.
So I do not think one can "turn it off" and just run the CPU at full blast until it blows up due to poor cooling. That is why they added scaling to the CPUs.
try turning up your A/C or putting it somewhere cooler, or cleaning out your vents, fans etc.. to help the air flow.
If you use scaling to control your cpu speeds then you should get a steady continuous pace out of it.
what are your temps on your CPU getting to, to cause it to implement scaling?
Thank You so much for replying. In my recording studio, the issue is the CPU Frequency Scaling is causing latency, in my recording sessions. I guess what I am asking is how do I adjust the settings? The following is what another user had told me to do, however, I don't believe I understand the code:
"--Kernel_Frequency <frequency>
"sudo modprobe p4_clockmod"
now add line "p4_clockmod" to "/etc/modules" so the cpu clock starts
"sudo cpufreq-selector -f 1000000"
I tried this, but I completely was lost as I'm new to Linux.
Any assistance is greatly appreciated....
I've got this script here, that I found on the net, that scales the core speeds to keep it at a temp that it was told to.
Code:
#!/bin/bash
# Usage: temp_throttle.sh max_temp
# USE CELSIUS TEMPERATURES.
# version 2.20
cat << EOF
Author: Sepero 2016 (sepero 111 @ gmx . com)
URL: http://github.com/Sepero/temp-throttle/
EOF
# Additional Links
# http://seperohacker.blogspot.com/2012/10/linux-keep-your-cpu-cool-with-frequency.html
# Additional Credits
# Wolfgang Ocker <weo AT weo1 DOT de> - Patch for unspecified cpu frequencies.
# License: GNU GPL 2.0
# Generic function for printing an error and exiting.
err_exit () {
echo ""
echo "Error: $@" 1>&2
exit 128
}
if [ $# -ne 1 ]; then
# If temperature wasn't given, then print a message and exit.
echo "Please supply a maximum desired temperature in Celsius." 1>&2
echo "For example: ${0} 60" 1>&2
exit 2
else
#Set the first argument as the maximum desired temperature.
MAX_TEMP=$1
fi
### START Initialize Global variables.
# The frequency will increase when low temperature is reached.
LOW_TEMP=$((MAX_TEMP - 5))
CORES=$(nproc) # Get number of CPU cores.
echo -e "Number of CPU cores detected: $CORES\n"
CORES=$((CORES - 1)) # Subtract 1 from $CORES for easier counting later.
# Temperatures internally are calculated to the thousandth.
MAX_TEMP=${MAX_TEMP}000
LOW_TEMP=${LOW_TEMP}000
FREQ_FILE="/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies"
FREQ_MIN="/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq"
FREQ_MAX="/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq"
# Store available cpu frequencies in a space separated string FREQ_LIST.
if [ -f $FREQ_FILE ]; then
# If $FREQ_FILE exists, get frequencies from it.
FREQ_LIST=$(cat $FREQ_FILE) || err_exit "Could not read available cpu frequencies from file $FREQ_FILE"
elif [ -f $FREQ_MIN -a -f $FREQ_MAX ]; then
# Else if $FREQ_MIN and $FREQ_MAX exist, generate a list of frequencies between them.
FREQ_LIST=$(seq $(cat $FREQ_MAX) -100000 $(cat $FREQ_MIN)) || err_exit "Could not compute available cpu frequencies"
else
err_exit "Could not determine available cpu frequencies"
fi
FREQ_LIST_LEN=$(echo $FREQ_LIST | wc -w)
# CURRENT_FREQ will save the index of the currently used frequency in FREQ_LIST.
CURRENT_FREQ=2
# This is a list of possible locations to read the current system temperature.
TEMPERATURE_FILES="
/sys/class/thermal/thermal_zone0/temp
/sys/class/thermal/thermal_zone1/temp
/sys/class/thermal/thermal_zone2/temp
/sys/class/hwmon/hwmon0/temp1_input
/sys/class/hwmon/hwmon1/temp1_input
/sys/class/hwmon/hwmon2/temp1_input
/sys/class/hwmon/hwmon0/device/temp1_input
/sys/class/hwmon/hwmon1/device/temp1_input
/sys/class/hwmon/hwmon2/device/temp1_input
null
"
# Store the first temperature location that exists in the variable TEMP_FILE.
# The location stored in $TEMP_FILE will be used for temperature readings.
for file in $TEMPERATURE_FILES; do
TEMP_FILE=$file
[ -f $TEMP_FILE ] && break
done
[ $TEMP_FILE == "null" ] && err_exit "The location for temperature reading was not found."
### END Initialize Global variables.
### START define script functions.
# Set the maximum frequency for all cpu cores.
set_freq () {
# From the string FREQ_LIST, we choose the item at index CURRENT_FREQ.
FREQ_TO_SET=$(echo $FREQ_LIST | cut -d " " -f $CURRENT_FREQ)
echo $FREQ_TO_SET
for i in $(seq 0 $CORES); do
# Try to set core frequency by writing to /sys/devices.
{ sudo echo $FREQ_TO_SET 2> /dev/null > /sys/devices/system/cpu/cpu$i/cpufreq/scaling_max_freq; } ||
# Else, try to set core frequency using command cpufreq-set.
{ sudo cpufreq-set -c $i --max $FREQ_TO_SET > /dev/null; } ||
# Else, return error message.
{ err_exit "Failed to set frequency CPU core$i. Run script as Root user. Some systems may require to install the package cpufrequtils."; }
done
}
# Will reduce the frequency of cpus if possible.
throttle () {
if [ $CURRENT_FREQ -lt $FREQ_LIST_LEN ]; then
CURRENT_FREQ=$((CURRENT_FREQ + 1))
echo -n "throttle "
set_freq $CURRENT_FREQ
fi
}
# Will increase the frequency of cpus if possible.
unthrottle () {
if [ $CURRENT_FREQ -ne 1 ]; then
CURRENT_FREQ=$((CURRENT_FREQ - 1))
echo -n "unthrottle "
set_freq $CURRENT_FREQ
fi
}
get_temp () {
# Get the system temperature.
TEMP=$(cat $TEMP_FILE)
}
### END define script functions.
echo "Initialize to max CPU frequency"
unthrottle
# Main loop
while true; do
get_temp # Gets the current temperature and set it to the variable TEMP.
if [ $TEMP -gt $MAX_TEMP ]; then # Throttle if too hot.
throttle
elif [ $TEMP -le $LOW_TEMP ]; then # Unthrottle if cool.
unthrottle
fi
sleep 3 # The amount of time between checking temperatures.
done
usage
Code:
./scriptName Max_temp
if you look at the code you can see how this is being done, so use it as is, or modify it, the thing to really check is the location of your cpu files that get edited. It is not a standard path naming scheme.
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