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bfdf7569 LB |
1 | This file describes how to run the tcp_*_kern.o tcp_bpf (or socket_ops) |
2 | programs. These programs attach to a cgroupv2. The following commands create | |
3 | a cgroupv2 and attach a bash shell to the group. | |
4 | ||
5 | mkdir -p /tmp/cgroupv2 | |
6 | mount -t cgroup2 none /tmp/cgroupv2 | |
7 | mkdir -p /tmp/cgroupv2/foo | |
8 | bash | |
9 | echo $$ >> /tmp/cgroupv2/foo/cgroup.procs | |
10 | ||
11 | Anything that runs under this shell belongs to the foo cgroupv2 To load | |
12 | (attach) one of the tcp_*_kern.o programs: | |
13 | ||
14 | ./load_sock_ops -l /tmp/cgroupv2/foo tcp_basertt_kern.o | |
15 | ||
16 | If the "-l" flag is used, the load_sock_ops program will continue to run | |
17 | printing the BPF log buffer. The tcp_*_kern.o programs use special print | |
18 | functions to print logging information (if enabled by the ifdef). | |
19 | ||
20 | If using netperf/netserver to create traffic, you need to run them under the | |
21 | cgroupv2 to which the BPF programs are attached (i.e. under bash shell | |
22 | attached to the cgroupv2). | |
23 | ||
24 | To remove (unattach) a socket_ops BPF program from a cgroupv2: | |
25 | ||
26 | ./load_sock_ops -r /tmp/cgroupv2/foo |