selftests: cgroup: Run test_core under interfering stress

all:

TEST_FILES     := with_stress.sh

TEST_PROGS     := test_stress.sh

TEST_GEN_PROGS = test_memcontrol

TEST_GEN_PROGS += test_core

TEST_GEN_PROGS += test_freezer

#!/bin/bash

# SPDX-License-Identifier: GPL-2.0

./with_stress.sh -s subsys -s fork ./test_core

#!/bin/bash

# SPDX-License-Identifier: GPL-2.0

# Kselftest framework requirement - SKIP code is 4.

ksft_skip=4

stress_fork()

{

	while true ; do

		/usr/bin/true

		sleep 0.01

	done

}

stress_subsys()

{

	local verb=+

	while true ; do

		echo $verb$subsys_ctrl >$sysfs/cgroup.subtree_control

		[ $verb = "+" ] && verb=- || verb=+

		# incommensurable period with other stresses

		sleep 0.011

	done

}

init_and_check()

{

	sysfs=`mount -t cgroup2 | head -1 | awk '{ print $3 }'`

	if [ ! -d "$sysfs" ]; then

		echo "Skipping: cgroup2 is not mounted" >&2

		exit $ksft_skip

	fi

	if ! echo +$subsys_ctrl >$sysfs/cgroup.subtree_control ; then

		echo "Skipping: cannot enable $subsys_ctrl in $sysfs" >&2

		exit $ksft_skip

	fi

	if ! echo -$subsys_ctrl >$sysfs/cgroup.subtree_control ; then

		echo "Skipping: cannot disable $subsys_ctrl in $sysfs" >&2

		exit $ksft_skip

	fi

}

declare -a stresses

declare -a stress_pids

duration=5

rc=0

subsys_ctrl=cpuset

sysfs=

while getopts c:d:hs: opt; do

	case $opt in

	c)

		subsys_ctrl=$OPTARG

		;;

	d)

		duration=$OPTARG

		;;

	h)

		echo "Usage $0 [ -s stress ] ... [ -d duration ] [-c controller] cmd args .."

		echo -e "\t default duration $duration seconds"

		echo -e "\t default controller $subsys_ctrl"

		exit

		;;

	s)

		func=stress_$OPTARG

		if [ "x$(type -t $func)" != "xfunction" ] ; then

			echo "Unknown stress $OPTARG"

			exit 1

		fi

		stresses+=($func)

		;;

	esac

done

shift $((OPTIND - 1))

init_and_check

for s in ${stresses[*]} ; do

	$s &

	stress_pids+=($!)

done

time=0

start=$(date +%s)

while [ $time -lt $duration ] ; do

	$*

	rc=$?

	[ $rc -eq 0 ] || break

	time=$(($(date +%s) - $start))

done

for pid in ${stress_pids[*]} ; do

	kill -SIGTERM $pid

	wait $pid

done

exit $rc