#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Kselftest framework requirement - SKIP code is 4.
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ksft_skip=4
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stress_fork()
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{
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while true ; do
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/usr/bin/true
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sleep 0.01
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done
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}
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stress_subsys()
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{
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local verb=+
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while true ; do
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echo $verb$subsys_ctrl >$sysfs/cgroup.subtree_control
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[ $verb = "+" ] && verb=- || verb=+
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# incommensurable period with other stresses
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sleep 0.011
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done
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}
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init_and_check()
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{
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sysfs=`mount -t cgroup2 | head -1 | awk '{ print $3 }'`
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if [ ! -d "$sysfs" ]; then
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echo "Skipping: cgroup2 is not mounted" >&2
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exit $ksft_skip
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fi
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if ! echo +$subsys_ctrl >$sysfs/cgroup.subtree_control ; then
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echo "Skipping: cannot enable $subsys_ctrl in $sysfs" >&2
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exit $ksft_skip
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fi
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if ! echo -$subsys_ctrl >$sysfs/cgroup.subtree_control ; then
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echo "Skipping: cannot disable $subsys_ctrl in $sysfs" >&2
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exit $ksft_skip
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fi
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}
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declare -a stresses
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declare -a stress_pids
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duration=5
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rc=0
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subsys_ctrl=cpuset
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sysfs=
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while getopts c:d:hs: opt; do
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case $opt in
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c)
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subsys_ctrl=$OPTARG
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;;
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d)
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duration=$OPTARG
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;;
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h)
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echo "Usage $0 [ -s stress ] ... [ -d duration ] [-c controller] cmd args .."
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echo -e "\t default duration $duration seconds"
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echo -e "\t default controller $subsys_ctrl"
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exit
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;;
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s)
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func=stress_$OPTARG
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if [ "x$(type -t $func)" != "xfunction" ] ; then
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echo "Unknown stress $OPTARG"
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exit 1
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fi
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stresses+=($func)
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;;
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esac
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done
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shift $((OPTIND - 1))
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init_and_check
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for s in ${stresses[*]} ; do
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$s &
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stress_pids+=($!)
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done
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time=0
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start=$(date +%s)
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while [ $time -lt $duration ] ; do
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$*
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rc=$?
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[ $rc -eq 0 ] || break
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time=$(($(date +%s) - $start))
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done
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for pid in ${stress_pids[*]} ; do
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kill -SIGTERM $pid
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wait $pid
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done
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exit $rc
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