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Commit 1e4c2830 authored by Viresh Kumar's avatar Viresh Kumar Committed by Shuah Khan
Browse files

selftest: cpufreq: Add special tests 



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: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarShuah Khan <shuahkh@osg.samsung.com>
parent 6751faf3

tools/testing/selftests/cpufreq/Makefile

+1 −1
Original line number Diff line number Diff line 
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

tools/testing/selftests/cpufreq/governor.sh

+7 −0
Original line number Diff line number Diff line
@@ -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

tools/testing/selftests/cpufreq/main.sh

+23 −2
Original line number Diff line number Diff line
@@ -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

tools/testing/selftests/cpufreq/special-tests.sh

0 → 100755
+115 −0
Original line number Diff line number Diff line 
#!/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

}