cpu          /sys/fs/cgroup/cpu
cpuacct      /sys/fs/cgroup/cpuacct
cpuset       /sys/fs/cgroup/cpuset
memory       /sys/fs/cgroup/memory
devices      /sys/fs/cgroup/devices
freezer      /some/random/location/freezer
blkio        /sys/fs/cgroup/blkio
net_cls      <null>
perf_event   /sys/fs/cgroup/perf_event
name=systemd <null>
unified      <null>