Add test which verifies capacity calculation on arm architecture platforms.
This will work on any platform that uses parse_dt_topology() arch hook to set cpu capacity. Currently only arm (not arm64) platforms do this. Signed-off-by: Larry Bassel <larry.bas...@linaro.org> --- cputopology/cputopology_04.sh | 131 +++++++++++++++++++++++++++++++++++++++++ cputopology/cputopology_04.txt | 5 ++ 2 files changed, 136 insertions(+) create mode 100755 cputopology/cputopology_04.sh create mode 100644 cputopology/cputopology_04.txt diff --git a/cputopology/cputopology_04.sh b/cputopology/cputopology_04.sh new file mode 100755 index 0000000..cce46cd --- /dev/null +++ b/cputopology/cputopology_04.sh @@ -0,0 +1,131 @@ +#!/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.bas...@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 diff --git a/cputopology/cputopology_04.txt b/cputopology/cputopology_04.txt new file mode 100644 index 0000000..2995aab --- /dev/null +++ b/cputopology/cputopology_04.txt @@ -0,0 +1,5 @@ +Test capacity calculation (this is based on +the algorithm in arch/arm/kernel/topology.c), +make sure that the information in +/sys/firmware/devicetree/base/cpus corresponds +to that reported by the kernel log. -- 1.8.3.2 _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-dev
