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Date: Mon, 30 Oct 2023 13:40:39 -0400
From: Lucas Karpinski <lkarpins@...hat.com>
To: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
pabeni@...hat.com, shuah@...nel.org
Cc: netdev@...r.kernel.org, linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v2] selftests/net: synchronize udpgso_bench rx and tx
The sockets used by udpgso_bench_tx aren't always ready when
udpgso_bench_tx transmits packets. This issue is more prevalent in -rt
kernels, but can occur in both. Replace the hacky sleep calls with a
function that checks whether the ports in the namespace are ready for
use.
Suggested-by: Paolo Abeni <pabeni@...hat.com>
Signed-off-by: Lucas Karpinski <lkarpins@...hat.com>
---
https://lore.kernel.org/all/t7v6mmuobrbucyfpwqbcujtvpa3wxnsrc36cz5rr6kzzrzkwtj@toz6mr4ggnyp/
Changelog v2:
- applied synchronization method suggested by Pablo
- changed commit message to code
tools/testing/selftests/net/udpgro.sh | 27 ++++++++++++++-----
tools/testing/selftests/net/udpgro_bench.sh | 19 +++++++++++--
tools/testing/selftests/net/udpgro_frglist.sh | 19 +++++++++++--
3 files changed, 54 insertions(+), 11 deletions(-)
diff --git a/tools/testing/selftests/net/udpgro.sh b/tools/testing/selftests/net/udpgro.sh
index 0c743752669a..04792a315729 100755
--- a/tools/testing/selftests/net/udpgro.sh
+++ b/tools/testing/selftests/net/udpgro.sh
@@ -24,6 +24,22 @@ cleanup() {
}
trap cleanup EXIT
+wait_local_port_listen()
+{
+ local port="${1}"
+
+ local port_hex
+ port_hex="$(printf "%04X" "${port}")"
+
+ local i
+ for i in $(seq 10); do
+ ip netns exec "${PEER_NS}" cat /proc/net/udp* | \
+ awk "BEGIN {rc=1} {if (\$2 ~ /:${port_hex}\$/) {rc=0; exit}} END {exit rc}" &&
+ break
+ sleep 0.1
+ done
+}
+
cfg_veth() {
ip netns add "${PEER_NS}"
ip -netns "${PEER_NS}" link set lo up
@@ -51,8 +67,7 @@ run_one() {
echo "ok" || \
echo "failed" &
- # Hack: let bg programs complete the startup
- sleep 0.2
+ wait_local_port_listen 8000
./udpgso_bench_tx ${tx_args}
ret=$?
wait $(jobs -p)
@@ -97,7 +112,7 @@ run_one_nat() {
echo "ok" || \
echo "failed"&
- sleep 0.1
+ wait_local_port_listen 8000
./udpgso_bench_tx ${tx_args}
ret=$?
kill -INT $pid
@@ -118,11 +133,9 @@ run_one_2sock() {
echo "ok" || \
echo "failed" &
- # Hack: let bg programs complete the startup
- sleep 0.2
+ wait_local_port_listen 12345
./udpgso_bench_tx ${tx_args} -p 12345
- sleep 0.1
- # first UDP GSO socket should be closed at this point
+ wait_local_port_listen 8000
./udpgso_bench_tx ${tx_args}
ret=$?
wait $(jobs -p)
diff --git a/tools/testing/selftests/net/udpgro_bench.sh b/tools/testing/selftests/net/udpgro_bench.sh
index 894972877e8b..91833518e80b 100755
--- a/tools/testing/selftests/net/udpgro_bench.sh
+++ b/tools/testing/selftests/net/udpgro_bench.sh
@@ -16,6 +16,22 @@ cleanup() {
}
trap cleanup EXIT
+wait_local_port_listen()
+{
+ local port="${1}"
+
+ local port_hex
+ port_hex="$(printf "%04X" "${port}")"
+
+ local i
+ for i in $(seq 10); do
+ ip netns exec "${PEER_NS}" cat /proc/net/udp* | \
+ awk "BEGIN {rc=1} {if (\$2 ~ /:${port_hex}\$/) {rc=0; exit}} END {exit rc}" &&
+ break
+ sleep 0.1
+ done
+}
+
run_one() {
# use 'rx' as separator between sender args and receiver args
local -r all="$@"
@@ -40,8 +56,7 @@ run_one() {
ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${rx_args} -r &
ip netns exec "${PEER_NS}" ./udpgso_bench_rx -t ${rx_args} -r &
- # Hack: let bg programs complete the startup
- sleep 0.2
+ wait_local_port_listen 8000
./udpgso_bench_tx ${tx_args}
}
diff --git a/tools/testing/selftests/net/udpgro_frglist.sh b/tools/testing/selftests/net/udpgro_frglist.sh
index 0a6359bed0b9..0aa2068f122c 100755
--- a/tools/testing/selftests/net/udpgro_frglist.sh
+++ b/tools/testing/selftests/net/udpgro_frglist.sh
@@ -16,6 +16,22 @@ cleanup() {
}
trap cleanup EXIT
+wait_local_port_listen()
+{
+ local port="${1}"
+
+ local port_hex
+ port_hex="$(printf "%04X" "${port}")"
+
+ local i
+ for i in $(seq 10); do
+ ip netns exec "${PEER_NS}" cat /proc/net/udp* | \
+ awk "BEGIN {rc=1} {if (\$2 ~ /:${port_hex}\$/) {rc=0; exit}} END {exit rc}" &&
+ break
+ sleep 0.1
+ done
+}
+
run_one() {
# use 'rx' as separator between sender args and receiver args
local -r all="$@"
@@ -45,8 +61,7 @@ run_one() {
echo ${rx_args}
ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${rx_args} -r &
- # Hack: let bg programs complete the startup
- sleep 0.2
+ wait_local_port_listen 8000
./udpgso_bench_tx ${tx_args}
}
--
2.41.0
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