This commit adds first regression test "cpufreq_freq_test.sh" for the cpufreq subsystem. Signed-off-by: Lukasz Majewski <l.majewski@xxxxxxxxxxx> --- Changes for v2: - Replace *_PATCH with *_PATH for variables names - Corrected mistakes in the README file - Providing detailed explanation of the patch in the README file --- drivers/cpufreq/tests/README | 33 +++++++ drivers/cpufreq/tests/cpufreq_freq_test.sh | 149 +++++++++++++++++++++++++++++ 2 files changed, 182 insertions(+) create mode 100644 drivers/cpufreq/tests/README create mode 100755 drivers/cpufreq/tests/cpufreq_freq_test.sh diff --git a/drivers/cpufreq/tests/README b/drivers/cpufreq/tests/README new file mode 100644 index 0000000..3e9cd80 --- /dev/null +++ b/drivers/cpufreq/tests/README @@ -0,0 +1,33 @@ +This file contains list of cpufreq's available regression tests with a short +usage description. + +1. cpufreq_freq_test.sh + +Description: +------------ +This script is supposed to test if cpufreq attributes exported by sysfs are +exposing correct values. + +To achieve this goal it saves the current governor and changes it to +"performance". Afterwards, it reads the "scaling_available_frequencies" +property. With the list of supported frequencies it is able to enforce each of +them by writing to "scaling_max_freq" attribute. To make the test more reliable +a superfluous load with gzip is created to be sure that we are running with +highest possible frequency. This high load is regulated with the 'sleep' +duration. After this time the "cpufreq_cur_freq" is read and compared with the +original value. As the last step the original governor is restored. + +This script can work with or without BOOST enabled and helps in spotting errors +related to cpufreq and common clock framework. + +Used attributes: +---------------- +- "scaling_available_frequencies" +- "cpuinfo_cur_freq" +- "scaling_governor" +- "scaling_max_freq" + +Target devices: +--------------- + +All devices which exports mentioned above sysfs attributes. \ No newline at end of file diff --git a/drivers/cpufreq/tests/cpufreq_freq_test.sh b/drivers/cpufreq/tests/cpufreq_freq_test.sh new file mode 100755 index 0000000..c25f05c --- /dev/null +++ b/drivers/cpufreq/tests/cpufreq_freq_test.sh @@ -0,0 +1,149 @@ +#!/bin/bash +# +# This file provides a simple mean to test if all declared freqs at +# "scaling_available_frequencies" can be set and if "cpuinfo_cur_freq" +# returns this value. +# +# Usage: ./cpufreq_freq_test.sh +# Requisite: Compiled in "performance" governor +# +# 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, you can access it online at +# http://www.gnu.org/licenses/gpl-2.0.html. +# +# Copyright (C) Samsung Electronics, 2014 +# +# Author: Lukasz Majewski <l.majewski@xxxxxxxxxxx> + +set +x + +COLOUR_RED="\33[31m" +COLOUR_BLUE="\33[34m" +COLOUR_GREEN="\33[32m" +COLOUR_DEFAULT="\33[0m" + +T_PATH=/sys/devices/system/cpu/cpu0/cpufreq +BOOST_PATH=/sys/devices/system/cpu/cpufreq + +if [ ! -d "$T_PATH" ]; then + printf " $COLOUR_RED No path to CPUFREQ $COLOUR_DEFAULT\n" + exit 1 +fi + +ERRORS=0 + +OLD_GOV=`cat $T_PATH/scaling_governor` +echo "CURRENT GOVERNOR: $OLD_GOV" +echo "SET GOVERNOR: performance" +echo "performance" > $T_PATH/scaling_governor + +function test_freqs1 { + FREQS=`cat $1` + for I in $FREQS; do + cpufreq_set_freq $I + if [ "$2" ]; then + printf "$COLOUR_BLUE BOOST $COLOUR_DEFAULT" $I + fi + cpufreq_test_freq $I + done +} + +function test_freqs2 { + FREQ=`cat $1` + FREQS_ARRAY=($FREQ) + + for freq in ${FREQS_ARRAY[@]} + do + echo "REFERENCE FREQ: $freq" + for f in ${FREQS_ARRAY[@]} + do + cpufreq_set_freq $freq + echo -n "----> " + cpufreq_set_freq $f + cpufreq_test_freq $f + done + done +} + +function restore { + if [ -f $BOOST_PATH/boost ]; then + cpufreq_boost_state $BOOST_STATE + fi + + echo "SET GOVERNOR: $OLD_GOV" + echo $OLD_GOV > $T_PATH/scaling_governor +} + +function die { + printf " $COLOUR_RED FAILED $COLOUR_DEFAULT\n" + restore_gov + exit 1 +} + +function cpufreq_test_freq { + gzip < /dev/urandom > /dev/null & + pid=$! + sleep 0.1 + CURR_FREQ=`cat $T_PATH/cpuinfo_cur_freq` + if [ $1 -eq $CURR_FREQ ]; then + printf "\t$COLOUR_GREEN OK $COLOUR_DEFAULT\n" + else + printf "$COLOUR_RED CURRENT $CURR_FREQ $COLOUR_DEFAULT\n" + ERRORS=`expr $ERRORS + 1` + #die + fi + kill -9 $pid + wait $! 2>/dev/null +} + +function cpufreq_set_freq { + echo $1 > $T_PATH/scaling_max_freq || die $? + printf "FREQ:$COLOUR_GREEN %s $COLOUR_DEFAULT" $1 +} + +function cpufreq_boost_state { + echo $1 > $BOOST_PATH/boost +} + +function cpufreq_boost_status { + cat $BOOST_PATH/boost +} + +if [ -f $BOOST_PATH/boost ]; then + echo "######################################" + echo "TEST BOOST OPERATION" + echo "######################################" + + BOOST_STATE=$(cpufreq_boost_status) + if [ $BOOST_STATE -eq 0 ]; then + cpufreq_boost_state 1 + fi + test_freqs1 $T_PATH/scaling_boost_frequencies 1 +fi + +echo "######################################" +echo "TEST AVAILABLE FREQS" +echo "######################################" +test_freqs1 $T_PATH/scaling_available_frequencies + +echo "######################################" +echo "TEST FREQS SWITCHING" +echo "######################################" +test_freqs2 $T_PATH/scaling_available_frequencies + +echo "######################################" +echo "ERRORS: $ERRORS" +echo "######################################" + +restore +exit 0 -- 2.0.0.rc2 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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