[PATCH net v2 3/4] selftests: net: Lower threshold with csum offload off in big_tcp_tunnels.sh

[Alice Mikityanska <alice.kernel@fastmail.im>]

From: Alice Mikityanska <alice@isovalent.com>

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: 5cb53743e1ff ("selftests: net: Add a test for BIG TCP in UDP tunnels")
Signed-off-by: Alice Mikityanska <alice@isovalent.com>
---
 tools/testing/selftests/net/big_tcp_tunnels.sh | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/net/big_tcp_tunnels.sh b/tools/testing/selftests/net/big_tcp_tunnels.sh
index e0b41f394ebb..003878df7415 100755
--- a/tools/testing/selftests/net/big_tcp_tunnels.sh
+++ b/tools/testing/selftests/net/big_tcp_tunnels.sh
@@ -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
 }
 
-- 
2.55.0