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selftests: net: Lower threshold with csum offload off in big_tcp_tunnels.sh

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With checksum offload disabled, much fewer BIG TCP packets are generated
due to overall loss of throughput. Use a separate threshold in these
tests, which is 1/10 of the threshold set for the rest of tests.

Fixes: 5cb53743e1 ("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/20260822120308.1165200-4-alice.kernel@fastmail.im
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Alice Mikityanska
2026-08-22 15:03:07 +03:00
committed by Jakub Kicinski
parent bb42c16f48
commit f7d0400bd3
1 changed files with 5 additions and 2 deletions
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7
tools/testing/selftests/net/big_tcp_tunnels.sh
View File

@@ -107,6 +107,8 @@ cleanup() {
}
do_test() {
local packets_threshold="$PACKETS_THRESHOLD"
# When tx csum offload is off, software GSO is performed before passing the
# packet to veth. Check BIG TCP packets inside the VXLAN tunnel to verify
# the software checksum path: if the checksum code is broken, these packets
@@ -125,6 +127,7 @@ do_test() {
else
IPTABLES=ip6tables
fi
packets_threshold=$(( PACKETS_THRESHOLD / 10 ))
fi
if [ "$2" = 4 ]; then
IPTABLES_SACK=iptables
@@ -157,8 +160,8 @@ do_test() {
echo "Captured BIG TCP RX packets: $PACKETS_SERVER"
echo "Captured BIG TCP TX packets: $PACKETS_CLIENT"
echo "Captured TCP SACK packets: $PACKETS_SACK"
[ "$PACKETS_SERVER" -gt "$PACKETS_THRESHOLD" ] || return 1
[ "$PACKETS_CLIENT" -gt "$PACKETS_THRESHOLD" ] || return 1
[ "$PACKETS_SERVER" -gt "$packets_threshold" ] || return 1
[ "$PACKETS_CLIENT" -gt "$packets_threshold" ] || return 1
[ "$PACKETS_SACK" -lt "$(( PACKETS_CLIENT / 2 ))" ] || return 1
}