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Configure RPi/RPi2 platform with optimal CPU and IO settings #4200

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Jun 16, 2015
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Configure RPi/RPi2 platform with optimal CPU and IO settings #4200

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28 changes: 28 additions & 0 deletions projects/RPi/initramfs/platform_init
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Original file line number Diff line number Diff line change
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#!/bin/sh

################################################################################
# This file is part of OpenELEC - http://www.openelec.tv
# Copyright (C) 2009-2015 Stephan Raue (stephan@openelec.tv)
#
# OpenELEC is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# OpenELEC is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with OpenELEC. If not, see <http://www.gnu.org/licenses/>.
################################################################################

# 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
28 changes: 28 additions & 0 deletions projects/RPi2/initramfs/platform_init
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,28 @@
#!/bin/sh

################################################################################
# This file is part of OpenELEC - http://www.openelec.tv
# Copyright (C) 2009-2015 Stephan Raue (stephan@openelec.tv)
#
# OpenELEC is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# OpenELEC is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with OpenELEC. If not, see <http://www.gnu.org/licenses/>.
################################################################################

# 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