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temp-throttle
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Lots of updates 

Prints more info on startup. Added error printing function. Added more comments in code. Slightly modified the variables for acquiring cpu frequency.
This commit is contained in:
Sepero 2013-08-12 17:31:53 -04:00
parent ee24c7e43a
commit 67c36a09dc
1 changed files with 26 additions and 9 deletions
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35
temp_throttle.sh
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@ -1,19 +1,31 @@
#!/bin/bash
# Authors: Sepero (sepero 111 @ gmail . com)
# Usage: temp_throttle.sh max_temp
# USE CELCIUS TEMPERATURES.
# Links
cat << EOF
Author: Sepero (sepero 111 @ gmail . com)
Remote Python developer and Linux administrator for hire.
URL: http://github.com/Sepero/temp-throttle/
EOF
# Additional Links
# http://github.com/Sepero/temp-throttle/
# http://seperohacker.blogspot.com/2012/10/linux-keep-your-cpu-cool-with-frequency.html
# License: GNU GPL 2.0
# Usage: temp_throttle.sh max_temp
# USE CELSIUS TEMPERATURES.
# Generic function for printing an error and exiting.
function 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 "Please supply a maximum desired temperature in Celcius." 1>&2
echo "For example: ${0} 60" 1>&2
exit 2
else
@ -31,11 +43,13 @@ echo -e "Number of CPU cores detected: $CORES\n"
MAX_TEMP=${MAX_TEMP}000
LOW_TEMP=${LOW_TEMP}000
# FREQ_LIST is a list (array) of all available cpu frequencies the system allows.
declare -a FREQ_LIST=($(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies))
# CURRENT_FREQ relates to the FREQ_LIST by keeping record of the currently set frequency.
let CURRENT_FREQ=1
FREQ_FILE="/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies"
# FREQ_LIST is an array of available frequencies.
declare -a FREQ_LIST=($(cat $FREQ_FILE)) || err_exit "Could not determine available cpu frequencies. Missing file: $FREQ_FILE"
# CURRENT_FREQ will save the index of the currently used frequency in FREQ_LIST.
CURRENT_FREQ=1
# Set the maximum frequency for all cpu cores.
function set_freq {
echo ${FREQ_LIST[$1]}
for((i=0;i<$CORES;i++)); do
@ -43,6 +57,7 @@ function set_freq {
done
}
# Will reduce the frequency of cpus if possible.
function throttle {
if [ $CURRENT_FREQ -ne $((${#FREQ_LIST[@]}-1)) ]; then
let CURRENT_FREQ+=1
@ -51,6 +66,7 @@ function throttle {
fi
}
# Will increase the frequency of cpus if possible.
function unthrottle {
if [ $CURRENT_FREQ -ne 0 ]; then
let CURRENT_FREQ-=1
@ -68,6 +84,7 @@ function get_temp {
#TEMP=$(cat /sys/class/hwmon/hwmon1/device/temp1_input)
}
# Mainloop
while true; do
get_temp
if [ $TEMP -gt $MAX_TEMP ]; then # Throttle if too hot.