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| author | Willem de Bruijn <willemb@google.com> | 2023-07-31 14:08:09 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-08-02 11:40:49 +0100 |
| commit | bd60438eeb1ebe9415b157398083b4910c7f0aa3 (patch) | |
| tree | c86b1a8c3aff424cd4acc3b07a1e01b5c54c73fe /scripts/gdb/linux/modules.py | |
| parent | 27bcd12295164c710369a94e56dc1ddfee1bbb75 (diff) | |
selftests/net: report rcv_mss in tcp_mmap
tcp_mmap tests TCP_ZEROCOPY_RECEIVE. If 0% of data is received using
mmap, this may be due to mss. Report rcv_mss to identify this cause.
Output of a run failed due to too small mss:
received 32768 MB (0 % mmap'ed) in 8.40458 s, 32.7057 Gbit
cpu usage user:0.027922 sys:8.21126, 251.44 usec per MB, 3252 c-switches, rcv_mss 1428
Output on a successful run:
received 32768 MB (99.9507 % mmap'ed) in 4.69023 s, 58.6064 Gbit
cpu usage user:0.029172 sys:2.56105, 79.0473 usec per MB, 57591 c-switches, rcv_mss 4096
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'scripts/gdb/linux/modules.py')
0 files changed, 0 insertions, 0 deletions