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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/Resources/TestSuite/PmQaSpecification#cpufreq_06
source ../include/functions.sh
CPUCYCLE=../utils/cpucycle
compute_freq_ratio() {
local cpu=$1
local freq=$2
set_frequency $cpu $freq
result=$($CPUCYCLE $cpu)
if [ $? -ne 0 ]; then
return 1
fi
results[$index]=$(echo "scale=3;($result / $freq)" | bc -l)
index=$((index + 1))
}
compute_freq_ratio_sum() {
res=${results[$index]}
sum=$(echo "($sum + $res)" | bc -l)
index=$((index + 1))
}
__check_freq_deviation() {
res=${results[$index]}
# compute deviation
dev=$(echo "scale=3;((( $res - $avg ) / $avg) * 100 )" | bc -l)
# change to absolute
dev=$(echo $dev | awk '{ print ($1 >= 0) ? $1 : 0 - $1}')
index=$((index + 1))
res=$(echo "($dev > 5.0)" | bc -l)
if [ "$res" = "1" ]; then
return 1
fi
return 0
}
check_freq_deviation() {
local cpu=$1
local freq=$2
check "deviation for frequency $(frequnit $freq)" __check_freq_deviation
}
check_deviation() {
local cpu=$1
set_governor $cpu userspace
for_each_frequency $cpu compute_freq_ratio
index=0
sum=0
for_each_frequency $cpu compute_freq_ratio_sum
avg=$(echo "scale=3;($sum / $index)" | bc -l)
index=0
for_each_frequency $cpu check_freq_deviation
}
supported=$(cat $CPU_PATH/cpu0/cpufreq/scaling_available_governors | grep "userspace")
if [ -z "$supported" ]; then
log_skip "userspace not supported"
exit 0
fi
save_governors
save_frequencies
trap "restore_frequencies; restore_governors; sigtrap" SIGHUP SIGINT SIGTERM
for_each_cpu check_deviation
restore_frequencies
restore_governors
test_status_show
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