lib/crunchstat/testdata/ubuntu1804/proc/2523/cgroup

   1 12:freezer:/
   2 11:rdma:/
   3 10:devices:/user.slice
   4 9:blkio:/user.slice
   5 8:net_cls,net_prio:/
   6 7:cpu,cpuacct:/user.slice
   7 6:memory:/user.slice
   8 5:cpuset:/
   9 4:perf_event:/
  10 3:pids:/user.slice/user-1000.slice/session-1.scope
  11 2:hugetlb:/
  12 1:name=systemd:/user.slice/user-1000.slice/session-1.scope
  13 0::/user.slice/user-1000.slice/session-1.scope