| This file describes how to run the tcp_*_kern.o tcp_bpf (or socket_ops) |
| programs. These programs attach to a cgroupv2. The following commands create |
| a cgroupv2 and attach a bash shell to the group. |
| |
| mkdir -p /tmp/cgroupv2 |
| mount -t cgroup2 none /tmp/cgroupv2 |
| mkdir -p /tmp/cgroupv2/foo |
| bash |
| echo $$ >> /tmp/cgroupv2/foo/cgroup.procs |
| |
| Anything that runs under this shell belongs to the foo cgroupv2 To load |
| (attach) one of the tcp_*_kern.o programs: |
| |
| ./load_sock_ops -l /tmp/cgroupv2/foo tcp_basertt_kern.o |
| |
| If the "-l" flag is used, the load_sock_ops program will continue to run |
| printing the BPF log buffer. The tcp_*_kern.o programs use special print |
| functions to print logging information (if enabled by the ifdef). |
| |
| If using netperf/netserver to create traffic, you need to run them under the |
| cgroupv2 to which the BPF programs are attached (i.e. under bash shell |
| attached to the cgroupv2). |
| |
| To remove (unattach) a socket_ops BPF program from a cgroupv2: |
| |
| ./load_sock_ops -r /tmp/cgroupv2/foo |