linux/tools/testing
Willem de Bruijn bd60438eeb 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>
2023-08-02 11:40:49 +01:00
..
crypto/chacha20-s390
cxl Merge branch 'for-6.5/cxl-rch-eh' into for-6.5/cxl 2023-06-25 18:56:13 -07:00
fault-injection
ktest
kunit hardening updates for v6.5-rc1 2023-06-27 21:24:18 -07:00
memblock Add tests for memblock_alloc_node() 2023-05-24 11:56:30 +03:00
nvdimm tools/testing/nvdimm: Drop empty platform remove function 2023-06-07 13:30:21 -07:00
radix-tree maple_tree: fix node allocation testing on 32 bit 2023-07-17 12:53:22 -07:00
scatterlist
selftests selftests/net: report rcv_mss in tcp_mmap 2023-08-02 11:40:49 +01:00
vsock vsock/test: MSG_PEEK test for SOCK_SEQPACKET 2023-07-27 15:51:48 +02:00