Nvidia's Max Performance Script for Tegra X1

maxPerf.sh

#!/bin/bash

if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 
   exit 1
fi

enable_fan(){
    # turn on fan for safety
    echo "Enabling fan for safety..."
    if [ ! -w /sys/kernel/debug/tegra_fan/target_pwm ] ; then
        echo "Cannot set fan -- exiting..."
    fi
    echo 255 > /sys/kernel/debug/tegra_fan/target_pwm
}

tegra_x1_max_perf(){
    enable_fan

    echo 0 > /sys/devices/system/cpu/cpuquiet/tegra_cpuquiet/enable
    echo 1 > /sys/kernel/cluster/immediate
    echo 1 > /sys/kernel/cluster/force
    echo G > /sys/kernel/cluster/active
    echo "Cluster: $(cat /sys/kernel/cluster/active)"

    # online all CPUs - ignore errors for already-online units
    echo "onlining CPUs: ignore errors..."
    for i in 0 1 2 3 ; do
        echo 1 > /sys/devices/system/cpu/cpu${i}/online
    done
    echo "Online CPUs: $(cat /sys/devices/system/cpu/online)"

    # set CPUs to max freq (perf governor not enabled on L4T yet)
    echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
    cpumax=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies | awk '{print $NF}')
    echo "${cpumax}" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
    for i in 0 1 2 3 ; do
        echo "CPU${i}: $(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq)"
    done

    # max GPU clock (should read from debugfs)
    cat /sys/kernel/debug/clock/gbus/max > /sys/kernel/debug/clock/override.gbus/rate
    echo 1 > /sys/kernel/debug/clock/override.gbus/state
    echo "GPU: $(cat /sys/kernel/debug/clock/gbus/rate)"

    # max EMC clock (should read from debugfs)
    cat /sys/kernel/debug/clock/emc/max > /sys/kernel/debug/clock/override.emc/rate
    echo 1 > /sys/kernel/debug/clock/override.emc/state
    echo "EMC: $(cat /sys/kernel/debug/clock/emc/rate)"
}

tegra_x2_max_perf(){
    enable_fan
    nvpmodel -m 0
}

tegra_detection=$(
  case "$(cat /sys/module/tegra_fuse/parameters/tegra_chip_id 2>/dev/null)" in
    ("64") echo "tegra_k1" ;;
    ("33") echo "tegra_x1" ;;
    ("24") echo "tegra_x2" ;;
    (*) echo "unknown" ;;
  esac)

echo "${tegra_detection} detected !"

case "${tegra_detection}" in
    ("tegra_x1") tegra_x1_max_perf ;;
    ("tegra_x2") tegra_x2_max_perf ;;
    (*) echo "Unsupported target" ;;
esac