| #!/bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| |
| NS1=lwt_ns1 |
| VETH0=tst_lwt1a |
| VETH1=tst_lwt1b |
| BPF_PROG=lwt_len_hist.bpf.o |
| TRACE_ROOT=/sys/kernel/tracing |
| |
| function cleanup { |
| # To reset saved histogram, remove pinned map |
| rm /sys/fs/bpf/tc/globals/lwt_len_hist_map |
| ip route del 192.168.253.2/32 dev $VETH0 2> /dev/null |
| ip link del $VETH0 2> /dev/null |
| ip link del $VETH1 2> /dev/null |
| ip netns exec $NS1 killall netserver |
| ip netns delete $NS1 2> /dev/null |
| } |
| |
| cleanup |
| |
| ip netns add $NS1 |
| ip link add $VETH0 type veth peer name $VETH1 |
| ip link set dev $VETH0 up |
| ip addr add 192.168.253.1/24 dev $VETH0 |
| ip link set $VETH1 netns $NS1 |
| ip netns exec $NS1 ip link set dev $VETH1 up |
| ip netns exec $NS1 ip addr add 192.168.253.2/24 dev $VETH1 |
| ip netns exec $NS1 netserver |
| |
| echo 1 > ${TRACE_ROOT}/tracing_on |
| cp /dev/null ${TRACE_ROOT}/trace |
| ip route add 192.168.253.2/32 encap bpf out obj $BPF_PROG section len_hist dev $VETH0 |
| netperf -H 192.168.253.2 -t TCP_STREAM |
| cat ${TRACE_ROOT}/trace | grep -v '^#' |
| ./lwt_len_hist |
| cleanup |
| echo 0 > ${TRACE_ROOT}/tracing_on |
| |
| exit 0 |
