1*4882a593Smuzhiyun#!/bin/bash 2*4882a593Smuzhiyun# SPDX-License-Identifier: GPL-2.0 3*4882a593Smuzhiyun 4*4882a593SmuzhiyunNS1=lwt_ns1 5*4882a593SmuzhiyunVETH0=tst_lwt1a 6*4882a593SmuzhiyunVETH1=tst_lwt1b 7*4882a593Smuzhiyun 8*4882a593SmuzhiyunTRACE_ROOT=/sys/kernel/debug/tracing 9*4882a593Smuzhiyun 10*4882a593Smuzhiyunfunction cleanup { 11*4882a593Smuzhiyun # To reset saved histogram, remove pinned map 12*4882a593Smuzhiyun rm /sys/fs/bpf/tc/globals/lwt_len_hist_map 13*4882a593Smuzhiyun ip route del 192.168.253.2/32 dev $VETH0 2> /dev/null 14*4882a593Smuzhiyun ip link del $VETH0 2> /dev/null 15*4882a593Smuzhiyun ip link del $VETH1 2> /dev/null 16*4882a593Smuzhiyun ip netns exec $NS1 killall netserver 17*4882a593Smuzhiyun ip netns delete $NS1 2> /dev/null 18*4882a593Smuzhiyun} 19*4882a593Smuzhiyun 20*4882a593Smuzhiyuncleanup 21*4882a593Smuzhiyun 22*4882a593Smuzhiyunip netns add $NS1 23*4882a593Smuzhiyunip link add $VETH0 type veth peer name $VETH1 24*4882a593Smuzhiyunip link set dev $VETH0 up 25*4882a593Smuzhiyunip addr add 192.168.253.1/24 dev $VETH0 26*4882a593Smuzhiyunip link set $VETH1 netns $NS1 27*4882a593Smuzhiyunip netns exec $NS1 ip link set dev $VETH1 up 28*4882a593Smuzhiyunip netns exec $NS1 ip addr add 192.168.253.2/24 dev $VETH1 29*4882a593Smuzhiyunip netns exec $NS1 netserver 30*4882a593Smuzhiyun 31*4882a593Smuzhiyunecho 1 > ${TRACE_ROOT}/tracing_on 32*4882a593Smuzhiyuncp /dev/null ${TRACE_ROOT}/trace 33*4882a593Smuzhiyunip route add 192.168.253.2/32 encap bpf out obj lwt_len_hist_kern.o section len_hist dev $VETH0 34*4882a593Smuzhiyunnetperf -H 192.168.253.2 -t TCP_STREAM 35*4882a593Smuzhiyuncat ${TRACE_ROOT}/trace | grep -v '^#' 36*4882a593Smuzhiyun./lwt_len_hist 37*4882a593Smuzhiyuncleanup 38*4882a593Smuzhiyunecho 0 > ${TRACE_ROOT}/tracing_on 39*4882a593Smuzhiyun 40*4882a593Smuzhiyunexit 0 41