tcp: inline tcp_chrono_start()

Browse source

tcp_chrono_start() is small enough, and used in TCP sendmsg()
fast path (from tcp_skb_entail()).

Note clang is already inlining it from functions in tcp_output.c.

Inlining it improves performance and reduces bloat :

$ scripts/bloat-o-meter -t vmlinux.old vmlinux.new
add/remove: 0/2 grow/shrink: 1/0 up/down: 1/-84 (-83)
Function                                     old     new   delta
tcp_skb_entail                               280     281      +1
__pfx_tcp_chrono_start                        16       -     -16
tcp_chrono_start                              68       -     -68
Total: Before=25192434, After=25192351, chg -0.00%

Note that tcp_chrono_stop() is too big.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Neal Cardwell <ncardwell@google.com>
Link: https://patch.msgid.link/20260308123549.2924460-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Eric Dumazet 2026-03-08 12:35:49 +00:00 • committed by Jakub Kicinski

parent 4b78c9cbd8

commit d6d4ff335d

2 changed files with 24 additions and 25 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

25

include/net/tcp.h

View file

24

net/ipv4/tcp_output.c

View file