為熱節流設置臨界 CPU 溫度

根據sensors，我的 CPU 核心的臨界溫度為 100°C。使用我的筆記型電腦時，它永遠不會超過 95°C（所以要麼我的感測器有缺陷，要麼出於某種原因將熱節流設置為較低的值，但這並不重要）。我有一個 Intel i7 並且 thermod.service 已啟動並正在執行，並且我在 Arch Linux 上。

但是 95°C 太熱了，我想降低這個值。我想在 75 或 80°C 時進行熱節流。我認為這很簡單，但顯然 Google 上的資訊很少，而且 thermod 的配置也缺少文件。

我試過

dbus-send --system --dest=org.freedesktop.thermald /org/freedesktop/thermald org.freedesktop.thermald.SetUserPassiveTemperature string:cpu uint32:80000

正如手冊頁所建議的那樣，但執行stress仍然使溫度達到 95。

那麼如何降低發生熱節流的值呢？

通過 shellscript 有一個 hack 解決方案：https ://github.com/Sepero/temp-throttle/

#!/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.
       { 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.
       { 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

引用自：https://unix.stackexchange.com/questions/443654