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Message-Id: <c64b3d4dacea2aa2035bdbb5f15cfa681a8b911a.1626449533.git.pabeni@redhat.com>
Date: Fri, 16 Jul 2021 17:34:23 +0200
From: Paolo Abeni <pabeni@...hat.com>
To: netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Shuah Khan <shuah@...nel.org>, toke@...hat.com
Subject: [PATCH RFC v2 5/5] selftests: net: veth: add tests for set_channel
Simple functional test for the newly exposed features.
Also add an optional stress test for the channel number
update under flood.
RFC v1 -> RFC v2:
- add the stress test
Signed-off-by: Paolo Abeni <pabeni@...hat.com>
---
tools/testing/selftests/net/veth.sh | 183 +++++++++++++++++++++++++++-
1 file changed, 182 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/veth.sh b/tools/testing/selftests/net/veth.sh
index 11d7cdb898c0..19eac3e44c06 100755
--- a/tools/testing/selftests/net/veth.sh
+++ b/tools/testing/selftests/net/veth.sh
@@ -13,7 +13,7 @@ readonly NS_DST=$BASE$DST
readonly BM_NET_V4=192.168.1.
readonly BM_NET_V6=2001:db8::
-readonly NPROCS=`nproc`
+readonly CPUS=`nproc`
ret=0
cleanup() {
@@ -75,6 +75,29 @@ chk_tso_flag() {
__chk_flag "$1" $2 $3 tcp-segmentation-offload
}
+chk_channels() {
+ local msg="$1"
+ local target=$2
+ local rx=$3
+ local tx=$4
+
+ local dev=veth$target
+
+ local cur_rx=`ip netns exec $BASE$target ethtool -l $dev |\
+ grep RX: | tail -n 1 | awk '{print $2}' `
+ local cur_tx=`ip netns exec $BASE$target ethtool -l $dev |\
+ grep TX: | tail -n 1 | awk '{print $2}'`
+ local cur_combined=`ip netns exec $BASE$target ethtool -l $dev |\
+ grep Combined: | tail -n 1 | awk '{print $2}'`
+
+ printf "%-60s" "$msg"
+ if [ "$cur_rx" = "$rx" -a "$cur_tx" = "$tx" -a "$cur_combined" = "n/a" ]; then
+ echo " ok "
+ else
+ echo " fail rx:$rx:$cur_rx tx:$tx:$cur_tx combined:n/a:$cur_combined"
+ fi
+}
+
chk_gro() {
local msg="$1"
local expected=$2
@@ -107,11 +130,100 @@ chk_gro() {
fi
}
+__change_channels()
+{
+ local cur_cpu
+ local end=$1
+ local cur
+ local i
+
+ while true; do
+ printf -v cur '%(%s)T'
+ [ $cur -le $end ] || break
+
+ for i in `seq 1 $CPUS`; do
+ ip netns exec $NS_SRC ethtool -L veth$SRC rx $i tx $i
+ ip netns exec $NS_DST ethtool -L veth$DST rx $i tx $i
+ done
+
+ for i in `seq 1 $((CPUS - 1))`; do
+ cur_cpu=$((CPUS - $i))
+ ip netns exec $NS_SRC ethtool -L veth$SRC rx $cur_cpu tx $cur_cpu
+ ip netns exec $NS_DST ethtool -L veth$DST rx $cur_cpu tx $cur_cpu
+ done
+ done
+}
+
+__send_data() {
+ local end=$1
+
+ while true; do
+ printf -v cur '%(%s)T'
+ [ $cur -le $end ] || break
+
+ ip netns exec $NS_SRC ./udpgso_bench_tx -4 -s 1000 -M 300 -D $BM_NET_V4$DST
+ done
+}
+
+do_stress() {
+ local end
+ printf -v end '%(%s)T'
+ end=$((end + $STRESS))
+
+ ip netns exec $NS_SRC ethtool -L veth$SRC rx 3 tx 3
+ ip netns exec $NS_DST ethtool -L veth$DST rx 3 tx 3
+
+ ip netns exec $NS_DST ./udpgso_bench_rx &
+ local rx_pid=$!
+
+ echo "Running stress test for $STRESS seconds..."
+ __change_channels $end &
+ local ch_pid=$!
+ __send_data $end &
+ local data_pid_1=$!
+ __send_data $end &
+ local data_pid_2=$!
+ __send_data $end &
+ local data_pid_3=$!
+ __send_data $end &
+ local data_pid_4=$!
+
+ wait $ch_pid $data_pid_1 $data_pid_2 $data_pid_3 $data_pid_4
+ kill -9 $rx_pid
+ echo "done"
+
+ # restore previous setting
+ ip netns exec $NS_SRC ethtool -L veth$SRC rx 2 tx 2
+ ip netns exec $NS_DST ethtool -L veth$DST rx 2 tx 1
+}
+
+usage() {
+ echo "Usage: $0 [-h] [-s <seconds>]"
+ echo -e "\t-h: show this help"
+ echo -e "\t-s: run optional stress tests for the given amount of seconds"
+}
+
+STRESS=0
+while getopts "hs:" option; do
+ case "$option" in
+ "h")
+ usage $0
+ exit 0
+ ;;
+ "s")
+ STRESS=$OPTARG
+ ;;
+ esac
+done
+
if [ ! -f ../bpf/xdp_dummy.o ]; then
echo "Missing xdp_dummy helper. Build bpf selftest first"
exit 1
fi
+[ $CPUS -lt 2 ] && echo "Only one CPU available, some tests will be skipped"
+[ $STRESS -gt 0 -a $CPUS -lt 3 ] && echo " stress test will be skipped, too"
+
create_ns
chk_gro_flag "default - gro flag" $SRC off
chk_gro_flag " - peer gro flag" $DST off
@@ -134,6 +246,8 @@ chk_gro " - aggregation with TSO off" 1
cleanup
create_ns
+chk_channels "default channels" $DST 1 1
+
ip -n $NS_DST link set dev veth$DST down
ip netns exec $NS_DST ethtool -K veth$DST gro on
chk_gro_flag "with gro enabled on link down - gro flag" $DST on
@@ -147,6 +261,56 @@ chk_gro " - aggregation with TSO off" 1
cleanup
create_ns
+
+CUR_TX=1
+CUR_RX=1
+if [ $CPUS -gt 1 ]; then
+ ip netns exec $NS_DST ethtool -L veth$DST tx 2
+ chk_channels "setting tx channels" $DST 1 2
+ CUR_TX=2
+fi
+
+if [ $CPUS -gt 2 ]; then
+ ip netns exec $NS_DST ethtool -L veth$DST rx 3 tx 3
+ chk_channels "setting both rx and tx channels" $DST 3 3
+ CUR_RX=3
+ CUR_TX=3
+fi
+
+ip netns exec $NS_DST ethtool -L veth$DST combined 2 2>/dev/null
+chk_channels "bad setting: combined channels" $DST $CUR_RX $CUR_TX
+
+ip netns exec $NS_DST ethtool -L veth$DST tx $((CPUS + 1)) 2>/dev/null
+chk_channels "setting invalid channels nr" $DST $CUR_RX $CUR_TX
+
+if [ $CPUS -gt 1 ]; then
+ # this also tests queues nr reduction
+ ip netns exec $NS_DST ethtool -L veth$DST rx 1 tx 2 2>/dev/null
+ ip netns exec $NS_SRC ethtool -L veth$SRC rx 1 tx 2 2>/dev/null
+ printf "%-60s" "bad setting: XDP with RX nr less than TX"
+ ip -n $NS_DST link set dev veth$DST xdp object ../bpf/xdp_dummy.o \
+ section xdp_dummy 2>/dev/null &&\
+ echo "fail - set operation successful ?!?" || echo " ok "
+
+ # the following tests will run with multiple channels active
+ ip netns exec $NS_SRC ethtool -L veth$SRC rx 2
+ ip netns exec $NS_DST ethtool -L veth$DST rx 2
+ ip -n $NS_DST link set dev veth$DST xdp object ../bpf/xdp_dummy.o \
+ section xdp_dummy 2>/dev/null
+ printf "%-60s" "bad setting: reducing RX nr below peer TX with XDP set"
+ ip netns exec $NS_DST ethtool -L veth$DST rx 1 2>/dev/null &&\
+ echo "fail - set operation successful ?!?" || echo " ok "
+ CUR_RX=2
+ CUR_TX=2
+fi
+
+if [ $CPUS -gt 2 ]; then
+ printf "%-60s" "bad setting: increasing peer TX nr above RX with XDP set"
+ ip netns exec $NS_SRC ethtool -L veth$SRC tx 3 2>/dev/null &&\
+ echo "fail - set operation successful ?!?" || echo " ok "
+ chk_channels "setting invalid channels nr" $DST 2 2
+fi
+
ip -n $NS_DST link set dev veth$DST xdp object ../bpf/xdp_dummy.o section xdp_dummy 2>/dev/null
chk_gro_flag "with xdp attached - gro flag" $DST on
chk_gro_flag " - peer gro flag" $SRC off
@@ -167,10 +331,27 @@ chk_gro_flag " - after gro on xdp off, gro flag" $DST on
chk_gro_flag " - peer gro flag" $SRC off
chk_tso_flag " - tso flag" $SRC on
chk_tso_flag " - peer tso flag" $DST on
+
+if [ $CPUS -gt 1 ]; then
+ ip netns exec $NS_DST ethtool -L veth$DST tx 1
+ chk_channels "decreasing tx channels with device down" $DST 2 1
+fi
+
ip -n $NS_DST link set dev veth$DST up
ip -n $NS_SRC link set dev veth$SRC up
chk_gro " - aggregation" 1
+if [ $CPUS -gt 1 ]; then
+ [ $STRESS -gt 0 -a $CPUS -gt 2 ] && do_stress
+
+ ip -n $NS_DST link set dev veth$DST down
+ ip -n $NS_SRC link set dev veth$SRC down
+ ip netns exec $NS_DST ethtool -L veth$DST tx 2
+ chk_channels "increasing tx channels with device down" $DST 2 2
+ ip -n $NS_DST link set dev veth$DST up
+ ip -n $NS_SRC link set dev veth$SRC up
+fi
+
ip netns exec $NS_DST ethtool -K veth$DST gro off
ip netns exec $NS_SRC ethtool -K veth$SRC tx-udp-segmentation off
chk_gro "aggregation again with default and TSO off" 10
--
2.26.3
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