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