diff options
| -rw-r--r-- | temp_throttle.sh | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/temp_throttle.sh b/temp_throttle.sh index b9cac08..9bdbcae 100644 --- a/temp_throttle.sh +++ b/temp_throttle.sh @@ -1,19 +1,31 @@ #!/bin/bash -# Authors: Sepero (sepero 111 @ gmail . com) +# Usage: temp_throttle.sh max_temp +# USE CELCIUS TEMPERATURES. + +cat << EOF +Author: Sepero (sepero 111 @ gmail . com) + Remote Python developer and Linux administrator for hire. +URL: http://github.com/Sepero/temp-throttle/ + +EOF -# Links +# 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. |