This patch adds support for special tests which were reported on the PM list over the years, which helped catching core bugs by several developers.
Signed-off-by: Viresh Kumar viresh.kumar@linaro.org --- tools/testing/selftests/cpufreq/Makefile | 2 +- tools/testing/selftests/cpufreq/governor.sh | 7 ++ tools/testing/selftests/cpufreq/main.sh | 25 ++++- tools/testing/selftests/cpufreq/special-tests.sh | 115 +++++++++++++++++++++++ 4 files changed, 146 insertions(+), 3 deletions(-) create mode 100755 tools/testing/selftests/cpufreq/special-tests.sh
diff --git a/tools/testing/selftests/cpufreq/Makefile b/tools/testing/selftests/cpufreq/Makefile index 80c8727dcec1..3955cd96f3a2 100644 --- a/tools/testing/selftests/cpufreq/Makefile +++ b/tools/testing/selftests/cpufreq/Makefile @@ -1,7 +1,7 @@ all:
TEST_PROGS := main.sh -TEST_FILES := cpu.sh cpufreq.sh governor.sh module.sh +TEST_FILES := cpu.sh cpufreq.sh governor.sh module.sh special-tests.sh
include ../lib.mk
diff --git a/tools/testing/selftests/cpufreq/governor.sh b/tools/testing/selftests/cpufreq/governor.sh index 2e42432892ab..def645103555 100755 --- a/tools/testing/selftests/cpufreq/governor.sh +++ b/tools/testing/selftests/cpufreq/governor.sh @@ -71,6 +71,13 @@ __switch_governor() echo $2 > $CPUFREQROOT/$1/scaling_governor }
+# param: +# $1: cpu, $2: governor +__switch_governor_for_cpu() +{ + echo $2 > $CPUROOT/$1/cpufreq/scaling_governor +} + # SWITCH GOVERNORS
# $1: cpu, $2: governor diff --git a/tools/testing/selftests/cpufreq/main.sh b/tools/testing/selftests/cpufreq/main.sh index 2515867ac9de..01bac76ac0ec 100755 --- a/tools/testing/selftests/cpufreq/main.sh +++ b/tools/testing/selftests/cpufreq/main.sh @@ -4,6 +4,7 @@ source cpu.sh source cpufreq.sh source governor.sh source module.sh +source special-tests.sh
FUNC=basic # do basic tests by default OUTFILE=cpufreq_selftest @@ -19,7 +20,11 @@ helpme() [-t <basic: Basic cpufreq testing suspend: suspend/resume, hibernate: hibernate/resume, - modtest: test driver or governor modules. Only to be used with -d or -g options>] + modtest: test driver or governor modules. Only to be used with -d or -g options, + sptest1: Simple governor switch to produce lockdep. + sptest2: Concurrent governor switch to produce lockdep. + sptest3: Governor races, shuffle between governors quickly. + sptest4: CPU hotplugs with updates to cpufreq files.>] [-d <driver's module name: only with "-t modtest>"] [-g <governor's module name: only with "-t modtest>"] \n" @@ -67,7 +72,7 @@ parse_arguments() helpme ;;
- t) # --func_type (Function to perform: basic, suspend, hibernate, modtest (default: basic)) + t) # --func_type (Function to perform: basic, suspend, hibernate, modtest, sptest1/2/3/4 (default: basic)) FUNC=$OPTARG ;;
@@ -136,6 +141,22 @@ do_test() fi ;;
+ "sptest1") + simple_lockdep + ;; + + "sptest2") + concurrent_lockdep + ;; + + "sptest3") + governor_race + ;; + + "sptest4") + hotplug_with_updates + ;; + *) echo "Invalid [-f] function type" helpme diff --git a/tools/testing/selftests/cpufreq/special-tests.sh b/tools/testing/selftests/cpufreq/special-tests.sh new file mode 100755 index 000000000000..58b730f23ef7 --- /dev/null +++ b/tools/testing/selftests/cpufreq/special-tests.sh @@ -0,0 +1,115 @@ +#!/bin/bash +# +# Special test cases reported by people + +# Testcase 1: Reported here: http://marc.info/?l=linux-pm&m=140618592709858&w=2 + +# protect against multiple inclusion +if [ $FILE_SPECIAL ]; then + return 0 +else + FILE_SPECIAL=DONE +fi + +source cpu.sh +source cpufreq.sh +source governor.sh + +# Test 1 +# $1: policy +__simple_lockdep() +{ + # switch to ondemand + __switch_governor $1 "ondemand" + + # cat ondemand files + local ondir=$(find_gov_directory $1 "ondemand") + if [ -z $ondir ]; then + printf "${FUNCNAME[0]}Ondemand directory not created, quit" + return + fi + + cat $ondir/* + + # switch to conservative + __switch_governor $1 "conservative" +} + +simple_lockdep() +{ + printf "** Test: Running ${FUNCNAME[0]} **\n" + + for_each_policy __simple_lockdep +} + +# Test 2 +# $1: policy +__concurrent_lockdep() +{ + for i in `seq 0 100`; do + __simple_lockdep $1 + done +} + +concurrent_lockdep() +{ + printf "** Test: Running ${FUNCNAME[0]} **\n" + + for_each_policy_concurrent __concurrent_lockdep +} + +# Test 3 +quick_shuffle() +{ + # this is called concurrently from governor_race + for I in `seq 1000` + do + echo ondemand | sudo tee $CPUFREQROOT/policy*/scaling_governor & + echo userspace | sudo tee $CPUFREQROOT/policy*/scaling_governor & + done +} + +governor_race() +{ + printf "** Test: Running ${FUNCNAME[0]} **\n" + + # run 8 concurrent instances + for I in `seq 8` + do + quick_shuffle & + done +} + +# Test 4 +# $1: cpu +hotplug_with_updates_cpu() +{ + local filepath="$CPUROOT/$1/cpufreq" + + # switch to ondemand + __switch_governor_for_cpu $1 "ondemand" + + for i in `seq 1 5000` + do + reboot_cpu $1 + done & + + local freqs=$(cat $filepath/scaling_available_frequencies) + local oldfreq=$(cat $filepath/scaling_min_freq) + + for j in `seq 1 5000` + do + # Set all frequencies one-by-one + for freq in $freqs; do + echo $freq > $filepath/scaling_min_freq + done + done + + # restore old freq + echo $oldfreq > $filepath/scaling_min_freq +} + +hotplug_with_updates() +{ + for_each_non_boot_cpu hotplug_with_updates_cpu +}