cg_name_indexed
extern char *cg_name_indexed(const char *root, const char *name, int index);
children[i].cgroup = cg_name_indexed(parent, "cpucg_child", i);
leaf[i].cgroup = cg_name_indexed(ancestor, "cpucg_leaf", i);
child = cg_name_indexed(parent, "child", i);
child = cg_name_indexed(parent, "child", i);
child = cg_name_indexed(parent, "child", i);
children[i] = cg_name_indexed(parent[1], "child_memcg", i);