12:blkio:/ 11:net_cls,net_prio:/ 10:perf_event:/ 9:hugetlb:/ 8:pids:/system.slice/httpd.service 7:cpu,cpuacct:/ 6:cpuset:/ 5:rdma:/ 4:memory:/system.slice/httpd.service 3:freezer:/ 2:devices:/system.slice/httpd.service 1:name=systemd:/system.slice/httpd.service