1#!/bin/bash
 
 2
 3NS1=lwt_ns1
 4VETH0=tst_lwt1a
 5VETH1=tst_lwt1b
 6
 7TRACE_ROOT=/sys/kernel/debug/tracing
 8
 9function cleanup {
10	ip route del 192.168.253.2/32 dev $VETH0 2> /dev/null
11	ip link del $VETH0 2> /dev/null
12	ip link del $VETH1 2> /dev/null
13	ip netns exec $NS1 killall netserver
14	ip netns delete $NS1 2> /dev/null
15}
16
17cleanup
18
19ip netns add $NS1
20ip link add $VETH0 type veth peer name $VETH1
21ip link set dev $VETH0 up
22ip addr add 192.168.253.1/24 dev $VETH0
23ip link set $VETH1 netns $NS1
24ip netns exec $NS1 ip link set dev $VETH1 up
25ip netns exec $NS1 ip addr add 192.168.253.2/24 dev $VETH1
26ip netns exec $NS1 netserver
27
28echo 1 > ${TRACE_ROOT}/tracing_on
29cp /dev/null ${TRACE_ROOT}/trace
30ip route add 192.168.253.2/32 encap bpf out obj lwt_len_hist_kern.o section len_hist dev $VETH0
31netperf -H 192.168.253.2 -t TCP_STREAM
32cat ${TRACE_ROOT}/trace | grep -v '^#'
33./lwt_len_hist
34cleanup
35echo 0 > ${TRACE_ROOT}/tracing_on
36
37exit 0

 1#!/bin/bash
 2# SPDX-License-Identifier: GPL-2.0
 3
 4NS1=lwt_ns1
 5VETH0=tst_lwt1a
 6VETH1=tst_lwt1b
 7
 8TRACE_ROOT=/sys/kernel/debug/tracing
 9
10function cleanup {
11	ip route del 192.168.253.2/32 dev $VETH0 2> /dev/null
12	ip link del $VETH0 2> /dev/null
13	ip link del $VETH1 2> /dev/null
14	ip netns exec $NS1 killall netserver
15	ip netns delete $NS1 2> /dev/null
16}
17
18cleanup
19
20ip netns add $NS1
21ip link add $VETH0 type veth peer name $VETH1
22ip link set dev $VETH0 up
23ip addr add 192.168.253.1/24 dev $VETH0
24ip link set $VETH1 netns $NS1
25ip netns exec $NS1 ip link set dev $VETH1 up
26ip netns exec $NS1 ip addr add 192.168.253.2/24 dev $VETH1
27ip netns exec $NS1 netserver
28
29echo 1 > ${TRACE_ROOT}/tracing_on
30cp /dev/null ${TRACE_ROOT}/trace
31ip route add 192.168.253.2/32 encap bpf out obj lwt_len_hist_kern.o section len_hist dev $VETH0
32netperf -H 192.168.253.2 -t TCP_STREAM
33cat ${TRACE_ROOT}/trace | grep -v '^#'
34./lwt_len_hist
35cleanup
36echo 0 > ${TRACE_ROOT}/tracing_on
37
38exit 0