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#!/bin/bash
#
# PM-QA validation test suite for the power management on Linux
#
# Copyright (C) 2011, Linaro Limited.
#
# This program 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.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# Contributors:
# Daniel Lezcano <daniel.lezcano@linaro.org> (IBM Corporation)
# - initial API and implementation
#
# URL : https://wiki.linaro.org/WorkingGroups/PowerManagement/Doc/QA/Scripts#cpufreq_05
source ../include/functions.sh
if [ $(id -u) != 0 ]; then
log_skip "run as non-root"
exit 0
fi
save_governors
trap restore_governors SIGHUP SIGINT SIGTERM
switch_ondemand() {
local cpu=$1
set_governor $cpu 'ondemand'
}
switch_conservative() {
local cpu=$1
set_governor $cpu 'conservative'
}
switch_userspace() {
local cpu=$1
set_governor $cpu 'userspace'
}
supported=$(cat $CPU_PATH/cpu0/cpufreq/scaling_available_governors | grep "ondemand")
if [ -z "$supported" ]; then
log_skip "ondemand not supported"
else
for cpu in $(ls $CPU_PATH | grep "cpu[0-9].*"); do
switch_ondemand $cpu
done
check "'ondemand' directory exists" "test -d $CPU_PATH/cpufreq/ondemand"
fi
supported=$(cat $CPU_PATH/cpu0/cpufreq/scaling_available_governors | grep "conservative")
if [ -z "$supported" ]; then
log_skip "conservative not supported"
else
for cpu in $(ls $CPU_PATH | grep "cpu[0-9].*"); do
switch_conservative $cpu
done
check "'conservative' directory exists" "test -d $CPU_PATH/cpufreq/conservative"
fi
supported=$(cat $CPU_PATH/cpu0/cpufreq/scaling_available_governors | grep "userspace")
if [ -z "$supported" ]; then
log_skip "userspace not supported"
else
for cpu in $(ls $CPU_PATH | grep "cpu[0-9].*"); do
switch_userspace $cpu
done
check "'ondemand' directory is not there" "test ! -d $CPU_PATH/cpufreq/ondemand"
check "'conservative' directory is not there" "test ! -d $CPU_PATH/cpufreq/conservative"
fi
# if more than one cpu, combine governors
nrcpus=$(ls $CPU_PATH | grep "cpu[0-9].*" | wc -l)
if [ $nrcpus > 1 ]; then
affected=$(cat $CPU_PATH/cpu0/cpufreq/affected_cpus | grep 1)
if [ -z $affected ]; then
switch_ondemand cpu0
switch_conservative cpu1
check "'ondemand' directory exists" "test -d $CPU_PATH/cpufreq/ondemand"
check "'conservative' directory exists" "test -d $CPU_PATH/cpufreq/conservative"
else
log_skip "combine governors not supported"
fi
fi
restore_governors
test_status_show
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