#!/system/bin/sh

interval=0.5																
path="/sys/devices/system/cpu/cpu"
n_cpu=`ls /sys/devices/system/cpu | grep "^cpu[0-9]" | wc -l`
n_policy=`ls /sys/devices/system/cpu/cpufreq | grep "^policy[0-9]" | wc -l`

function random_hotplug(){
	let n_cpu-=1
	local ret=0
	while [ 1 ]
	do
		let ret=$RANDOM%$n_cpu
		let ret+=1
		local online=`cat $path$ret"/online"`
		[ "$online" = "0" ] && cm=1 || cm=0
		online_cpus
		get_cpus=$?
		if [ "$cm" = "1" ];then
			echo $cm > $path$ret"/online"
			echo "online_cpu_count=$get_cpus n_policy=$n_policy $path$ret/online $cm $online `cat $path$ret/online` `cat /sys/devices/system/cpu/online`"
			sleep $interval
		else
			if [ "$get_cpus" -gt "2" ];then
				echo $cm > $path$ret"/online"
				echo "online_cpu_count=$get_cpus n_policy=$n_policy $path$ret/online $cm $online `cat $path$ret/online` `cat /sys/devices/system/cpu/online`"
				sleep $interval
			else
				echo "online_cpu_count=[ $get_cpus -lt 2 ], n_policy=$n_policy , next loop, $path$ret/online $cm $online `cat $path$ret/online` `cat /sys/devices/system/cpu/online`"
			fi
		fi

	done
}

function online_cpus(){
	local cpu_count=1
	for i in `seq 1 $n_cpu`
	do
		[ "`cat $path${i}/online`" -eq "1" ] && let cpu_count=cpu_count+1 
	done
	return $cpu_count
}


random_hotplug