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| author | Alice Mikityanska <alice@isovalent.com> | 2026-08-22 15:03:08 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-08-27 08:42:28 -0700 |
| commit | 1d62b83fb75125344693db8ebf970653db529f40 (patch) | |
| tree | b2562439718f723a8edc3c9e1c80ecdd868b2fdf /tools/perf/scripts/python | |
| parent | f7d0400bd3452ed6915592b1929ba1d39d8e6552 (diff) | |
| download | linux-1d62b83fb75125344693db8ebf970653db529f40.tar.gz linux-1d62b83fb75125344693db8ebf970653db529f40.zip | |
selftests: net: Fix slow configurations in big_tcp_tunnels.sh
The combination of checksum offload disabled (that causes software GSO)
and a debug kernel is inherently slow. Depending on the CPU power and
load, RTT may increase, limiting sk_pacing_rate, so tcp_tso_autosize
caps SKBs at around 40 segments, and zero BIG TCP packets are produced.
Increase sysctl net.ipv4.tcp_min_tso_segs and set a bigger initial value
of CWND in these configurations to force BIG TCP.
Fixes: 5cb53743e1ff ("selftests: net: Add a test for BIG TCP in UDP tunnels")
Signed-off-by: Alice Mikityanska <alice@isovalent.com>
Acked-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20260822120308.1165200-5-alice.kernel@fastmail.im
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions