tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-snapshot-action-hist.tc

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: event trigger - test inter-event histogram trigger snapshot action
   4 # requires: set_event snapshot events/sched/sched_process_fork/hist "onchange(var)":README "snapshot()":README
   5
   6 fail() { #msg
   7     echo $1
   8     exit_fail
   9 }
  10
  11 echo "Test snapshot action"
  12
  13 echo 1 > events/sched/enable
  14
  15 echo 'hist:keys=comm:newprio=prio:onchange($newprio).save(comm,prio):onchange($newprio).snapshot() if comm=="ping"' >> events/sched/sched_waking/trigger
  16
  17 ping $LOCALHOST -c 3
  18 nice -n 1 ping $LOCALHOST -c 3
  19
  20 echo 0 > tracing_on
  21
  22 if ! grep -q "changed:" events/sched/sched_waking/hist; then
  23     fail "Failed to create onchange action inter-event histogram"
  24 fi
  25
  26 if ! grep -q "comm=ping" snapshot; then
  27     fail "Failed to create snapshot action inter-event histogram"
  28 fi
  29
  30 exit 0