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@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2021-07-20 10:41:52 +02:00 committed by David S. Miller
parent 9d3684c24a
commit 1ec2230fc7

View File

@ -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