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#!/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
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