disable_intel_pstates.sh

#!/bin/sh

PSTATE_DEVICE_PATH="/sys/devices/system/cpu/intel_pstate"
TRUE="1"
FALSE="0"

if [ ! "$UID" == "0"  ]; then echo ; echo "This script must be run as root" ; echo ; exit ; fi

if [ ! -e "$PSTATE_DEVICE_PATH"  ]; then echo ; echo "There is no PSTATE support in the kernel cannot continue." ; echo "If you have PSTATE support in your kernel, then this path exists: $PSTATE_DEVICE_PATH" ; echo ; fi

echo

# Disable Turbo Boost
if [ "`cat /sys/devices/system/cpu/intel_pstate/no_turbo`" == "0" ] ; then

        echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo
        echo "Processor No_Turbo Mode ---> 1"
    else
        echo 0 > /sys/devices/system/cpu/intel_pstate/no_turbo
        echo "Processor No_Turbo Mode ---> 0"
fi

# Disable PSTATEs
for PROCESSOR_NUMBER in /sys/devices/system/cpu/cpu?
    do
        for CPU_IDLE_ITEM_NUMBER in $PROCESSOR_NUMBER/cpuidle
            do
                for CPU_STATE in $PROCESSOR_NUMBER/cpuidle/state?
                    do
                        # Leave PSTATE 0 enabled
                        ITEM="`basename $CPU_STATE`"
                        if [ "`basename $CPU_STATE`" == "state0" ] ; then
                            echo "$CPU_STATE/disable was left in state: `cat $CPU_STATE/disable`"
                            continue
                        fi

                        # Leave PSTATE 1 enabled
                        if [ "`basename $CPU_STATE`" == "state1" ] ; then
                            echo "$CPU_STATE/disable was left in state: `cat $CPU_STATE/disable`"
                            continue
                        fi

                        # Leave PSTATE 2 enabled
                        if [ "`basename $CPU_STATE`" == "state2" ] ; then
                            echo "$CPU_STATE/disable was left in state: `cat $CPU_STATE/disable`"
                            continue
                        fi

                        # # Leave PSTATE 3 enabled
                        # if [ "`basename $CPU_STATE`" == "state3" ] ; then
                        #   echo "$CPU_STATE/disable was left in state: `cat $CPU_STATE/disable`"
                        #   continue
                        # fi

                        # Disable a PSTATE
                        echo 1 > $CPU_STATE/disable
                        echo -n "$CPU_STATE/disable ---> "
                        cat $CPU_STATE/disable
                    done
            done
    done
echo