Create temp_throttle.sh

temp_throttle.sh

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+#!/bin/bash
+# temp_throttle.sh max_temp
+
+# USE CELCIUS TEMPERATURES.
+
+if [ $# -ne 1 ]; then
+	# If tempurature wasn't given, then print a message and exit.
+	echo "Please supply a maximum desired temperature in Celcius." 1>&2
+	echo "For example:  temp_throttle.sh 60" 1>&2
+	exit 2
+else
+	#Set the first argument as the maximum desired temperature.
+	MAX_TEMP=$1
+fi
+
+# The frequency will increase when low temperature is reached.
+let LOW_TEMP=$MAX_TEMP-5
+
+CORES=$(nproc) # Get number of CPU cores.
+echo -e "Number of CPU cores detected: $CORES\n"
+
+# Temperatures internally are calculated to the thousandth.
+MAX_TEMP=${MAX_TEMP}000
+LOW_TEMP=${LOW_TEMP}000
+
+declare -a FREQ_LIST=($(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies))
+let CURRENT_FREQ=1
+
+function set_freq {
+	echo ${FREQ_LIST[$1]}
+	for((i=0;i<$CORES;i++)); do
+		echo ${FREQ_LIST[$1]} > /sys/devices/system/cpu/cpu$i/cpufreq/scaling_max_freq
+	done
+}
+
+function throttle {
+	if [ $CURRENT_FREQ -ne $((${#FREQ_LIST[@]}-1)) ]; then
+		let CURRENT_FREQ+=1
+		echo -n "throttle "
+		set_freq $CURRENT_FREQ
+	fi
+}
+
+function unthrottle {
+	if [ $CURRENT_FREQ -ne 0 ]; then
+		let CURRENT_FREQ-=1
+		echo -n "unthrottle "
+		set_freq $CURRENT_FREQ
+	fi
+}
+
+function get_temp {
+	# Get the system temperature.
+	# If one of these doesn't work, the try uncommenting another.
+	
+	TEMP=$(cat /sys/class/thermal/thermal_zone0/temp)
+	#TEMP=$(cat /sys/class/hwmon/hwmon0/temp1_input) 
+	#TEMP=$(cat /sys/class/hwmon/hwmon1/device/temp1_input)
+}
+
+while true; do
+	get_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
+done