Set all CPU frequency scaling governors to 'performance'

cpu_performance.sh

#!/bin/sh
#
# Set frequency scaling governer to 'performance' on all cores
set -e
GOVERNOR=performance
SYS_PATH=/sys/devices/system/cpu
for cpu in `ls $SYS_PATH | grep 'cpu[0-9]\+'`; do
	CPU_SCALING_GOVERNOR=$SYS_PATH/$cpu/cpufreq/scaling_governor
	current=`cat $CPU_SCALING_GOVERNOR`
	echo "$cpu is currently '$current', setting to 'performance'"
	echo $GOVERNOR | sudo tee -a $CPU_SCALING_GOVERNOR > /dev/null
done