Script improvements

# performance between different device models.

# Fun notes for maintaining this file:

#      `expr` can deal with ints > INT32_MAX, but if compares cannot. This is why we use MHz.

#      `expr` can sometimes evaluate right-to-left. This is why we use parens.

#      $((arithmetic expressions)) can deal with ints > INT32_MAX, but if compares cannot. This is

#      why we use MHz.

#      $((arithmetic expressions)) can sometimes evaluate right-to-left. This is why we use parens.

#      Everything below the initial host-check isn't bash - Android uses mksh

#      mksh allows `\n` in an echo, bash doesn't

#      can't use `awk`

#      can't use `sed`

#      can't use `cut` on < L

#      can't use `expr` on < L

ARG_CORES=${1:-big}

CPU_TARGET_FREQ_PERCENT=50

GPU_TARGET_FREQ_PERCENT=50

        echo "Pushing $0 and running it on device..."

        dest=/data/local/tmp/`basename $0`

        adb push $0 ${dest}

        adb shell ${dest}

        adb shell ${dest} $@

        adb shell rm ${dest}

        exit

    else

fi

# require root

if [ "`id -u`" -ne "0" ]; then

if [[ `id` != "uid=0"* ]]; then

    echo "Not running as root, cannot lock clocks, aborting"

    exit -1

fi

DEVICE=`getprop ro.product.device`

MODEL=`getprop ro.product.model`

# Find CPU max frequency, and lock big cores to an available frequency

# that's >= $CPU_TARGET_FREQ_PERCENT% of max. Disable other cores.

if [ "$ARG_CORES" == "big" ]; then

    CPU_IDEAL_START_FREQ_KHZ=0

elif [ "$ARG_CORES" == "little" ]; then

    CPU_IDEAL_START_FREQ_KHZ=100000000 ## finding min of max freqs, so start at 100M KHz (100 GHz)

else

    echo "Invalid argument \$1 for ARG_CORES, should be 'big' or 'little', but was $ARG_CORES"

    exit -1

fi

function_core_check() {

    if [ "$ARG_CORES" == "big" ]; then

        [ $1 -gt $2 ]

    elif [ "$ARG_CORES" == "little" ]; then

        [ $1 -lt $2 ]

    else

        echo "Invalid argument \$1 for ARG_CORES, should be 'big' or 'little', but was $ARG_CORES"

        exit -1

    fi

}

function_setup_go() {

    if [ -f /d/fpsgo/common/force_onoff ]; then

        # Disable fpsgo

        echo 0 > /d/fpsgo/common/force_onoff

        fpsgoState=`cat /d/fpsgo/common/force_onoff`

        if [ "$fpsgoState" != "0" ] && [ "$fpsgoState" != "force off" ]; then

            echo "Failed to disable fpsgo"

            exit -1

        fi

    fi

}

# Find the min or max (little vs big) of CPU max frequency, and lock cores of the selected type to

# an available frequency that's >= $CPU_TARGET_FREQ_PERCENT% of max. Disable other cores.

function_lock_cpu() {

    CPU_BASE=/sys/devices/system/cpu

    GOV=cpufreq/scaling_governor

    # Options to make clock locking on go devices more sticky.

    function_setup_go

    # Find max CPU freq, and associated list of available freqs

    cpuMaxFreq=0

    cpuIdealFreq=$CPU_IDEAL_START_FREQ_KHZ

    cpuAvailFreqCmpr=0

    cpuAvailFreq=0

    enableIndices=''

    disableIndices=''

    cpu=0

    while [ -f ${CPU_BASE}/cpu${cpu}/online ]; do

        # enable core, so we can find its frequencies

        echo 1 > ${CPU_BASE}/cpu${cpu}/online

    while [ -d ${CPU_BASE}/cpu${cpu}/cpufreq ]; do

        # Try to enable core, so we can find its frequencies.

        # Note: In cases where the online file is inaccessible, it represents a

        # core which cannot be turned off, so we simply assume it is enabled if

        # this command fails.

        if [ -f "$CPU_BASE/cpu$cpu/online" ]; then

            echo 1 > ${CPU_BASE}/cpu${cpu}/online || true

        fi

        # set userspace governor on all CPUs to ensure freq scaling is disabled

        echo userspace > ${CPU_BASE}/cpu${cpu}/${GOV}

        maxFreq=`cat ${CPU_BASE}/cpu$cpu/cpufreq/cpuinfo_max_freq`

        availFreq=`cat ${CPU_BASE}/cpu$cpu/cpufreq/scaling_available_frequencies`

        availFreqCmpr=${availFreq// /-}

        if [ ${maxFreq} -gt ${cpuMaxFreq} ]; then

            # new highest max freq, look for cpus with same max freq and same avail freq list

            cpuMaxFreq=${maxFreq}

        if (function_core_check $maxFreq $cpuIdealFreq); then

            # new min/max of max freq, look for cpus with same max freq and same avail freq list

            cpuIdealFreq=${maxFreq}

            cpuAvailFreq=${availFreq}

            cpuAvailFreqCmpr=${availFreqCmpr}

            if [ -z ${disableIndices} ]; then

            if [ -z "$disableIndices" ]; then

                disableIndices="$enableIndices"

            else

                disableIndices="$disableIndices $enableIndices"

            fi

            enableIndices=${cpu}

        elif [ ${maxFreq} == ${cpuMaxFreq} ] && [ ${availFreqCmpr} == ${cpuAvailFreqCmpr} ]; then

        elif [ ${maxFreq} == ${cpuIdealFreq} ] && [ ${availFreqCmpr} == ${cpuAvailFreqCmpr} ]; then

            enableIndices="$enableIndices $cpu"

        else

            if [ -z "$disableIndices" ]; then

                disableIndices="$cpu"

            else

                disableIndices="$disableIndices $cpu"

            fi

        fi

        cpu=$(($cpu + 1))

    done

    # check that some CPUs will be enabled

    if [ -z "$enableIndices" ]; then

        echo "Failed to find any $ARG_CORES cores to enable, aborting."

        exit -1

    fi

    # Chose a frequency to lock to that's >= $CPU_TARGET_FREQ_PERCENT% of max

    # (below, 100M = 1K for KHz->MHz * 100 for %)

    TARGET_FREQ_MHZ=`expr \( ${cpuMaxFreq} \* ${CPU_TARGET_FREQ_PERCENT} \) \/ 100000`

    TARGET_FREQ_MHZ=$(( ($cpuIdealFreq * $CPU_TARGET_FREQ_PERCENT) / 100000 ))

    chosenFreq=0

    chosenFreqDiff=100000000

    for freq in ${cpuAvailFreq}; do

        freqMhz=`expr ${freq} \/ 1000`

        freqMhz=$(( ${freq} / 1000 ))

        if [ ${freqMhz} -ge ${TARGET_FREQ_MHZ} ]; then

            newChosenFreqDiff=$(( $freq - $TARGET_FREQ_MHZ ))

            if [ $newChosenFreqDiff -lt $chosenFreqDiff ]; then

                chosenFreq=${freq}

            break

                chosenFreqDiff=$(( $chosenFreq - $TARGET_FREQ_MHZ ))

            fi

        fi

    done

    # Lock wembley clocks using high-priority op code method.

    # This block depends on the shell utility awk, which is only available on API 27+

    if [ "$DEVICE" == "wembley" ]; then

        # Get list of available frequencies to lock to by parsing the op-code list.

        AVAIL_OP_FREQS=`cat /proc/cpufreq/MT_CPU_DVFS_LL/cpufreq_oppidx \

            | awk '{print $2}' \

            | tail -n +3 \

            | while read line; do

                echo "${line:1:${#line}-2}"

            done`

        # Compute the closest available frequency to the desired frequency, $chosenFreq.

        # This assumes the op codes listen in /proc/cpufreq/MT_CPU_DVFS_LL/cpufreq_oppidx are listed

        # in order and 0-indexed.

        opCode=-1

        opFreq=0

        currOpCode=-1

        for currOpFreq in $AVAIL_OP_FREQS; do

            currOpCode=$((currOpCode + 1))

            prevDiff=$((chosenFreq-opFreq))

            prevDiff=`function_abs $prevDiff`

            currDiff=$((chosenFreq-currOpFreq))

            currDiff=`function_abs $currDiff`

            if [ $currDiff -lt $prevDiff ]; then

                opCode="$currOpCode"

                opFreq="$currOpFreq"

            fi

        done

        echo "$opCode" > /proc/ppm/policy/ut_fix_freq_idx

    fi

    # enable 'big' CPUs

    for cpu in ${enableIndices}; do

        freq=${CPU_BASE}/cpu$cpu/cpufreq

        echo 1 > ${CPU_BASE}/cpu${cpu}/online

        echo userspace > ${CPU_BASE}/cpu${cpu}/${GOV}

        # Try to enable core, so we can find its frequencies.

        # Note: In cases where the online file is inaccessible, it represents a

        # core which cannot be turned off, so we simply assume it is enabled if

        # this command fails.

        if [ -f "$CPU_BASE/cpu$cpu/online" ]; then

            echo 1 > ${CPU_BASE}/cpu${cpu}/online || true

        fi

        # scaling_max_freq must be set before scaling_min_freq

        echo ${chosenFreq} > ${freq}/scaling_max_freq

        echo ${chosenFreq} > ${freq}/scaling_min_freq

        echo ${chosenFreq} > ${freq}/scaling_setspeed

        # Give system a bit of time to propagate the change to scaling_setspeed.

        sleep 0.1

        # validate setting the freq worked

        obsCur=`cat ${freq}/scaling_cur_freq`

        obsMin=`cat ${freq}/scaling_min_freq`

        obsMax=`cat ${freq}/scaling_max_freq`

        if [ obsCur -ne ${chosenFreq} ] || [ obsMin -ne ${chosenFreq} ] || [ obsMax -ne ${chosenFreq} ]; then

        if [ "$obsCur" -ne "$chosenFreq" ] || [ "$obsMin" -ne "$chosenFreq" ] || [ "$obsMax" -ne "$chosenFreq" ]; then

            echo "Failed to set CPU$cpu to $chosenFreq Hz! Aborting..."

            echo "scaling_cur_freq = $obsCur"

            echo "scaling_min_freq = $obsMin"

      echo 0 > ${CPU_BASE}/cpu${cpu}/online

    done

    echo "\nLocked CPUs ${enableIndices// /,} to $chosenFreq / $maxFreq KHz"

    echo "=================================="

    echo "Locked CPUs ${enableIndices// /,} to $chosenFreq / $cpuIdealFreq KHz"

    echo "Disabled CPUs ${disableIndices// /,}"

    echo "=================================="

}

# Returns the absolute value of the first arg passed to this helper.

function_abs() {

    n=$1

    if [ $n -lt 0 ]; then

        echo "$((n * -1 ))"

    else

        echo "$n"

    fi

}

# If we have a Qualcomm GPU, find its max frequency, and lock to

function_lock_gpu_kgsl() {

    if [ ! -d /sys/class/kgsl/kgsl-3d0/ ]; then

        # not kgsl, abort

        echo "\nCurrently don't support locking GPU clocks of $MODEL ($DEVICE)"

        echo "Currently don't support locking GPU clocks of $MODEL ($DEVICE)"

        return -1

    fi

    if [ ${DEVICE} == "walleye" ] || [ ${DEVICE} == "taimen" ]; then

        # Workaround crash

        echo "\nUnable to lock GPU clocks of $MODEL ($DEVICE)"

        echo "Unable to lock GPU clocks of $MODEL ($DEVICE)"

        return -1

    fi

    done

    # (below, 100M = 1M for MHz * 100 for %)

    TARGET_FREQ_MHZ=`expr \( ${gpuMaxFreq} \* ${GPU_TARGET_FREQ_PERCENT} \) \/ 100000000`

    TARGET_FREQ_MHZ=$(( (${gpuMaxFreq} * ${GPU_TARGET_FREQ_PERCENT}) / 100000000 ))

    chosenFreq=${gpuMaxFreq}

    index=0

    chosenIndex=0

    for freq in ${gpuAvailFreq}; do

        freqMhz=`expr ${freq} \/ 1000000`

        freqMhz=$(( ${freq} / 1000000 ))

        if [ ${freqMhz} -ge ${TARGET_FREQ_MHZ} ] && [ ${chosenFreq} -ge ${freq} ]; then

            # note avail freq are generally in reverse order, so we don't break out of this loop

            chosenFreq=${freq}

    done

    lastIndex=$(($index - 1))

    firstFreq=`echo $gpuAvailFreq | cut -d" " -f1`

    firstFreq=`function_cut_first_from_space_seperated_list $gpuAvailFreq`

    if [ ${gpuMaxFreq} != ${firstFreq} ]; then

        # pwrlevel is index of desired freq among available frequencies, from highest to lowest.

        echo "index = $chosenIndex"

        exit -1

    fi

    echo "\nLocked GPU to $chosenFreq / $gpuMaxFreq Hz"

    echo "Locked GPU to $chosenFreq / $gpuMaxFreq Hz"

}

# cut is not available on some devices (Nexus 5 running LRX22C).

function_cut_first_from_space_seperated_list() {

    list=$1

    for freq in $list; do

        echo $freq

        break

    done

}

# kill processes that manage thermals / scaling

stop thermal-engine

stop perfd

stop vendor.thermal-engine

stop vendor.perfd

stop thermal-engine || true

stop perfd || true

stop vendor.thermal-engine || true

stop vendor.perfd || true

setprop vendor.powerhal.init 0 || true

setprop ctl.interface_restart android.hardware.power@1.0::IPower/default || true

function_lock_cpu

if [ "$DEVICE" -ne "wembley" ]; then

    function_lock_gpu_kgsl

else

    echo "Unable to lock gpu clocks of $MODEL ($DEVICE)."

fi

# Memory bus - hardcoded per-device for now

if [ ${DEVICE} == "marlin" ] || [ ${DEVICE} == "sailfish" ]; then

    echo 13763 > /sys/class/devfreq/soc:qcom,gpubw/max_freq

else

    echo "\nUnable to lock memory bus of $MODEL ($DEVICE)."

    echo "Unable to lock memory bus of $MODEL ($DEVICE)."

fi

echo "\n$DEVICE clocks have been locked - to reset, reboot the device\n"

 No newline at end of file

echo "$DEVICE clocks have been locked - to reset, reboot the device"