for cpu_dir in /sys/devices/system/cpu/cpu[0-9]*
do
	online_file="$cpu_dir"/online
	[ -f "$online_file" ] && [ "$(cat "$online_file")" -eq 0 ] && continue

	file="$cpu_dir"/cpufreq/scaling_governor
	[ -f "$file" ] && echo "performance" > "$file"
done

dmsetup remove_all
wipefs -a --force /dev/sda1
mkfs -t btrfs /dev/sda1
mkdir -p /fs/sda1
mount -t btrfs /dev/sda1 /fs/sda1
 "mkdir" "-p" "/mnt/stress-ng"
 "mount" "/dev/sda1" "/mnt/stress-ng"
 "stress-ng" "--timeout" "30" "--times" "--verify" "--metrics-brief" "--sequential" "9" "--class" "filesystem" "--exclude" "spawn,exec,swap"