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--- ubuntu:cgroups:cgroupv1 [2021/07/14 11:15] – created peter
+++ ubuntu:cgroups:cgroupv1 [2021/07/25 10:40] (current) – peter
@@ Line 1: / Line 1: @@
 ====== Ubuntu - cgroups - cgroupv1 ======
 [[Ubuntu:cgroups:cgroupv1|cgroupv1]]
+cgroupv1 has a hierarchy per-resource, for example:
+<code bash>
+ls /sys/fs/cgroup
+</code>
+returns:
+<code bash>
+blkio    cpu,cpuacct  freezer  net_cls           perf_event  systemd
+cpu      cpuset       hugetlb  net_cls,net_prio  pids        unified
+cpuacct  devices      memory   net_prio          rdma
+</code>
+Each resource hierarchy contains cgroups for this resource:
+<code bash>
+find /sys/fs/cgroup/pids -type d
+</code>
+returns:
+<code bash>
+/sys/fs/cgroup/pids
+/sys/fs/cgroup/pids/docker
+/sys/fs/cgroup/pids/user.slice
+/sys/fs/cgroup/pids/system.slice
+/sys/fs/cgroup/pids/system.slice/irqbalance.service
+/sys/fs/cgroup/pids/system.slice/containerd.service
+/sys/fs/cgroup/pids/system.slice/systemd-networkd.service
+/sys/fs/cgroup/pids/system.slice/whoopsie.service
+/sys/fs/cgroup/pids/system.slice/cron.service
+/sys/fs/cgroup/pids/system.slice/avahi-daemon.service
+/sys/fs/cgroup/pids/system.slice/systemd-logind.service
+/sys/fs/cgroup/pids/machine.slice
+...
+</code>