tools/testing/selftests/net/fin_ack_lat.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # Test latency spikes caused by FIN/ACK handling race.
   5
   6 set +x
   7 set -e
   8
   9 tmpfile=$(mktemp /tmp/fin_ack_latency.XXXX.log)
  10
  11 cleanup() {
  12         kill $(pidof fin_ack_lat)
  13         rm -f $tmpfile
  14 }
  15
  16 trap cleanup EXIT
  17
  18 do_test() {
  19         RUNTIME=$1
  20
  21         ./fin_ack_lat | tee $tmpfile &
  22         PID=$!
  23
  24         sleep $RUNTIME
  25         NR_SPIKES=$(wc -l $tmpfile | awk '{print $1}')
  26         if [ $NR_SPIKES -gt 0 ]
  27         then
  28                 echo "FAIL: $NR_SPIKES spikes detected"
  29                 return 1
  30         fi
  31         return 0
  32 }
  33
  34 do_test "30"
  35 echo "test done"