Create a cgroup
NAME=example
cgcreate -g memory,cpu,io,misc,pids:$NAME
Assign an existing process to cgroup
PID=12345
cgclassify -g memory,cpu,io,misc,pids:$NAME $PID
Limit cpu usage to half of an core
cgset -r cpu.max="500000 1000000" $NAME
Pin process to two cores
cgset -r cpuset.cpus="0,1" $NAME