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rpi: use systemd for cpufreq tuning

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Signed-off-by: Ian Leonard <antonlacon@gmail.com>
This commit is contained in:
Ian Leonard 2019-10-11 21:01:22 +00:00
parent f27caaddc1
commit db6ebeedbf
2 changed files with 18 additions and 13 deletions
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13
projects/RPi/initramfs/platform_init
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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2009-2015 Stephan Raue (stephan@openelec.tv)
# Enable io_is_busy for improved sdhost performance - essentially, equivalent of force_turbo=1 but for mmc
echo 1 > /sys/devices/system/cpu/cpufreq/ondemand/io_is_busy
# Configure frequency scaling properties - should improve performance a little (turbo, in most cases)
echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo 50 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold
echo 100000 > /sys/devices/system/cpu/cpufreq/ondemand/sampling_rate
echo 50 > /sys/devices/system/cpu/cpufreq/ondemand/sampling_down_factor

18
projects/RPi/packages/systemd/scripts/cpufreq Executable file
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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2009-2015 Stephan Raue (stephan@openelec.tv)
# Copyright (C) 2019-present Team LibreELEC (https://libreelec.tv)
SYS_CPUFREQ_GOV=$( cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor )
SYS_ONDEMAND_DIR="/sys/devices/system/cpu/cpufreq/ondemand/"
# Configure frequency scaling properties
if [ "${SYS_CPUFREQ_GOV}" = "ondemand" ]; then
echo 1 > "${SYS_ONDEMAND_DIR}/io_is_busy"
echo 50 > "${SYS_ONDEMAND_DIR}/up_threshold"
echo 100000 > "${SYS_ONDEMAND_DIR}/sampling_rate"
echo 50 > "${SYS_ONDEMAND_DIR}/sampling_down_factor"
else
echo "cpufreq: settings not found for current cpu governor." | systemd-cat -p info
fi