• Thomas Graf's avatar
    bpf: Add tests and samples for LWT-BPF · f74599f7
    Thomas Graf authored
    Adds a series of tests to verify the functionality of attaching
    BPF programs at LWT hooks.
    
    Also adds a sample which collects a histogram of packet sizes which
    pass through an LWT hook.
    
    $ ./lwt_len_hist.sh
    Starting netserver with host 'IN(6)ADDR_ANY' port '12865' and family AF_UNSPEC
    MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.253.2 () port 0 AF_INET : demo
    Recv   Send    Send
    Socket Socket  Message  Elapsed
    Size   Size    Size     Time     Throughput
    bytes  bytes   bytes    secs.    10^6bits/sec
    
     87380  16384  16384    10.00    39857.69
           1 -> 1        : 0        |                                      |
           2 -> 3        : 0        |                                      |
           4 -> 7        : 0        |                                      |
           8 -> 15       : 0        |                                      |
          16 -> 31       : 0        |                                      |
          32 -> 63       : 22       |                                      |
          64 -> 127      : 98       |                                      |
         128 -> 255      : 213      |                                      |
         256 -> 511      : 1444251  |********                              |
         512 -> 1023     : 660610   |***                                   |
        1024 -> 2047     : 535241   |**                                    |
        2048 -> 4095     : 19       |                                      |
        4096 -> 8191     : 180      |                                      |
        8192 -> 16383    : 5578023  |************************************* |
       16384 -> 32767    : 632099   |***                                   |
       32768 -> 65535    : 6575     |                                      |
    Signed-off-by: 's avatarThomas Graf <tgraf@suug.ch>
    Acked-by: 's avatarAlexei Starovoitov <ast@kernel.org>
    Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
    f74599f7
test_lwt_bpf.c 6.04 KB