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|
#!/bin/sh
#
# PM-QA validation test suite for the power management on Linux
#
# Copyright (C) 2015, 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:
# Larry Bassel <larry.bassel@linaro.org>
#
# URL : https://wiki.linaro.org/WorkingGroups/PowerManagement/Resources/TestSuite/PmQaSpecification#cputopology_04
. ../include/functions.sh
calc_freq()
{
byte1=$1
byte2=$2
byte3=$3
byte4=$4
freq=$((byte1*0x1000000+byte2*0x10000+byte3*0x100+byte4))
}
# eff is the relative cpu efficiency of each processor
set_eff() {
type=$1
case $type in
arm,cortex-a15) eff=3891 ;;
arm,cortex-a7) eff=2048 ;;
* ) eff=1024 ;;
esac
}
# Calculate a middle efficiency, This is later used to scale
# the cpu_capacity such that an 'average' CPU is of middle capacity.
calc_mid_capacity()
{
dt_cpus=$(ls /sys/firmware/devicetree/base/cpus | grep "cpu@[0-9].*")
min_capacity=$((0xffffffff))
max_capacity=0
sched_capacity_shift=10
for dt_cpu in $dt_cpus; do
if [ ! -f /sys/firmware/devicetree/base/cpus/$dt_cpu/clock-frequency ]; then
log_skip "no clock frequency file present"
return
fi
if [ ! -f /sys/firmware/devicetree/base/cpus/$dt_cpu/compatible ]; then
log_skip "no compatible file present"
return
fi
filename=/sys/firmware/devicetree/base/cpus/$dt_cpu/clock-frequency
bytes=$(od -t u1 -A n $filename)
calc_freq $bytes
cpu_type=$(cat /sys/firmware/devicetree/base/cpus/$dt_cpu/compatible)
set_eff $cpu_type
capacity=$((($freq>>20)*$eff))
if [ $capacity -gt $max_capacity ]; then
max_capacity=$capacity
fi
if [ $capacity -lt $min_capacity ]; then
min_capacity=$capacity
fi
if [ $(((4 * $max_capacity))) -lt $(((3 * ($max_capacity + $min_capacity)))) ]; then
middle_capacity=$((($min_capacity + $max_capacity)>>($sched_capacity_shift+1)))
else
middle_capacity=$(((($max_capacity / 3)>>($sched_capacity_shift-1))+1))
fi
done
}
cpu_num=0
verify_cpu_capacity()
{
for dt_cpu in $dt_cpus; do
if [ ! -f /sys/firmware/devicetree/base/cpus/$dt_cpu/clock-frequency ]; then
log_skip "no clock frequency file present"
return
fi
if [ ! -f /sys/firmware/devicetree/base/cpus/$dt_cpu/compatible ]; then
log_skip "no compatible file present"
return
fi
filename=/sys/firmware/devicetree/base/cpus/$dt_cpu/clock-frequency
bytes=$(od -t u1 -A n $filename)
calc_freq $bytes
cpu_type=$(cat /sys/firmware/devicetree/base/cpus/$dt_cpu/compatible)
set_eff $cpu_type
capacity=$((($freq>>20)*$eff/$middle_capacity))
expected_capacity_string=$(dmesg | grep "CPU$cpu_num: update cpu_capacity")
expected_capacity=${expected_capacity_string##*cpu_capacity}
echo "cpu num: $cpu_num capacity $capacity expected capacity $expected_capacity"
check "expected capacity for cpu$cpu_num equal to computed capacity" "test $expected_capacity -eq $capacity"
cpu_num=$((cpu_num+1))
done
}
verify_capacity()
{
if ! [ -d /sys/firmware/devicetree/base/cpus ]; then
log_skip "no cpus directory present"
return
fi
calc_mid_capacity
dt_cpus=$(ls -1 /sys/firmware/devicetree/base/cpus | egrep "cpu@.{1,2}$")
verify_cpu_capacity
dt_cpus=$(ls -1 /sys/firmware/devicetree/base/cpus | egrep "cpu@.{3,4}$")
verify_cpu_capacity
}
verify_capacity || exit 1
test_status_show
|
