From: Willem de Bruijn <willemb@xxxxxxxxxx>
This test validates per-band packet limits in FQ. Packets are dropped
rather than enqueued if the limit for their band is reached.
This test is timing sensitive. It queues packets in FQ with a future
delivery time to fill the qdisc.
The test failed in a virtual environment (vng). Increase the delays
to make it more tolerant to environments with timing variance.
Signed-off-by: Willem de Bruijn <willemb@xxxxxxxxxx>
---
tools/testing/selftests/net/fq_band_pktlimit.sh | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/tools/testing/selftests/net/fq_band_pktlimit.sh b/tools/testing/selftests/net/fq_band_pktlimit.sh
index 24b77bdf41ff..977070ed42b3 100755
--- a/tools/testing/selftests/net/fq_band_pktlimit.sh
+++ b/tools/testing/selftests/net/fq_band_pktlimit.sh
@@ -8,7 +8,7 @@
# 3. send 20 pkts on band A: verify that 0 are queued, 20 dropped
# 4. send 20 pkts on band B: verify that 10 are queued, 10 dropped
#
-# Send packets with a 100ms delay to ensure that previously sent
+# Send packets with a delay to ensure that previously sent
# packets are still queued when later ones are sent.
# Use SO_TXTIME for this.
@@ -29,19 +29,21 @@ ip -6 addr add fdaa::1/128 dev dummy0
ip -6 route add fdaa::/64 dev dummy0
tc qdisc replace dev dummy0 root handle 1: fq quantum 1514 initial_quantum 1514 limit 10
-./cmsg_sender -6 -p u -d 100000 -n 20 fdaa::2 8000
+DELAY=400000
+
+./cmsg_sender -6 -p u -d "${DELAY}" -n 20 fdaa::2 8000
OUT1="$(tc -s qdisc show dev dummy0 | grep '^\ Sent')"
-./cmsg_sender -6 -p u -d 100000 -n 20 fdaa::2 8000
+./cmsg_sender -6 -p u -d "${DELAY}" -n 20 fdaa::2 8000
OUT2="$(tc -s qdisc show dev dummy0 | grep '^\ Sent')"
-./cmsg_sender -6 -p u -d 100000 -n 20 -P 7 fdaa::2 8000
+./cmsg_sender -6 -p u -d "${DELAY}" -n 20 -P 7 fdaa::2 8000
OUT3="$(tc -s qdisc show dev dummy0 | grep '^\ Sent')"
# Initial stats will report zero sent, as all packets are still
-# queued in FQ. Sleep for the delay period (100ms) and see that
+# queued in FQ. Sleep for at least the delay period and see that
# twenty are now sent.
-sleep 0.1
+sleep 0.6
OUT4="$(tc -s qdisc show dev dummy0 | grep '^\ Sent')"
# Log the output after the test
--
2.43.0.429.g432eaa2c6b-goog
