Full cgroup tree with empty groups cgroups
cgls --all shows empty cgroups too; cgtop ranks slices by live CPU/mem/io
systemd-cgls --all --no-pager; systemd-cgtop -d 2 --depth=3
more cgroups
all 8 commands →
Legacy v1 ad-hoc cgroup
cgcreate -g memory:/<name>; cgset -r memory.limit_in_bytes=512M <name>; cgexec -g memory:/<name> <command>
Service memory accounting (cgroup v2)
cat /sys/fs/cgroup/system.slice/<name>.service/memory.current /sys/fs/cgroup/system.slice/<name>.service/memory.max
Memory PSI pressure stall
cat /sys/fs/cgroup/system.slice/<name>.service/memory.pressure
CPU throttling stats (cgroup v2)
grep -E 'nr_throttled|throttled_usec' /sys/fs/cgroup/system.slice/<name>.service/cpu.stat
Read and set CPU quota (cgroup v2)
cat /sys/fs/cgroup/system.slice/<name>.service/cpu.max # "max 100000" = unlimited; "50000 100000" = 0.5 core