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	# To reset saved histogram, remove pinned map
12	rm /sys/fs/bpf/tc/globals/lwt_len_hist_map
13	ip route del 192.168.253.2/32 dev $VETH0 2> /dev/null
14	ip link del $VETH0 2> /dev/null
15	ip link del $VETH1 2> /dev/null
16	ip netns exec $NS1 killall netserver
17	ip netns delete $NS1 2> /dev/null
18}
19
20cleanup
21
22ip netns add $NS1
23ip link add $VETH0 type veth peer name $VETH1
24ip link set dev $VETH0 up
25ip addr add 192.168.253.1/24 dev $VETH0
26ip link set $VETH1 netns $NS1
27ip netns exec $NS1 ip link set dev $VETH1 up
28ip netns exec $NS1 ip addr add 192.168.253.2/24 dev $VETH1
29ip netns exec $NS1 netserver
30
31echo 1 > ${TRACE_ROOT}/tracing_on
32cp /dev/null ${TRACE_ROOT}/trace
33ip route add 192.168.253.2/32 encap bpf out obj lwt_len_hist_kern.o section len_hist dev $VETH0
34netperf -H 192.168.253.2 -t TCP_STREAM
35cat ${TRACE_ROOT}/trace | grep -v '^#'
36./lwt_len_hist
37cleanup
38echo 0 > ${TRACE_ROOT}/tracing_on
39
40exit 0

 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