samples/bpf/lwt_len_hist.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 NS1=lwt_ns1
   5 VETH0=tst_lwt1a
   6 VETH1=tst_lwt1b
   7
   8 TRACE_ROOT=/sys/kernel/debug/tracing
   9
  10 function 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
  20 cleanup
  21
  22 ip netns add $NS1
  23 ip link add $VETH0 type veth peer name $VETH1
  24 ip link set dev $VETH0 up
  25 ip addr add 192.168.253.1/24 dev $VETH0
  26 ip link set $VETH1 netns $NS1
  27 ip netns exec $NS1 ip link set dev $VETH1 up
  28 ip netns exec $NS1 ip addr add 192.168.253.2/24 dev $VETH1
  29 ip netns exec $NS1 netserver
  30
  31 echo 1 > ${TRACE_ROOT}/tracing_on
  32 cp /dev/null ${TRACE_ROOT}/trace
  33 ip route add 192.168.253.2/32 encap bpf out obj lwt_len_hist_kern.o section len_hist dev $VETH0
  34 netperf -H 192.168.253.2 -t TCP_STREAM
  35 cat ${TRACE_ROOT}/trace | grep -v '^#'
  36 ./lwt_len_hist
  37 cleanup
  38 echo 0 > ${TRACE_ROOT}/tracing_on
  39
  40 exit 0