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Diffstat (limited to 'samples/bpf/tcp_bpf.readme')
| -rw-r--r-- | samples/bpf/tcp_bpf.readme | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/samples/bpf/tcp_bpf.readme b/samples/bpf/tcp_bpf.readme new file mode 100644 index 000000000000..831fb601e3c9 --- /dev/null +++ b/samples/bpf/tcp_bpf.readme @@ -0,0 +1,26 @@ +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 |