#! /bin/bash

for i in $( seq 0 $(( $( cat /proc/cpuinfo | grep bogomips | wc -l ) - 1 )) ) ; do
  echo Setting core $i to performance mode
  echo performance > /sys/devices/system/cpu/cpu$i/cpufreq/scaling_governor ;
done

# version for R-Pi 3:

echo performance >  /sys/devices/system/cpu/cpufreq/policy0/scaling_governor  && (
  vcgencmd measure_temp ; \
  echo -n 'Current frequency: ' ; cat /sys/devices/system/cpu/cpufreq/policy0/cpuinfo_cur_freq )

