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
   5 fail() { #msg
   6     echo $1
   7     exit_fail
   8 }
   9
  10 if [ ! -f set_event ]; then
  11     echo "event tracing is not supported"
  12     exit_unsupported
  13 fi
  14
  15 if [ ! -f snapshot ]; then
  16     echo "snapshot is not supported"
  17     exit_unsupported
  18 fi
  19
  20 grep -q "onchange(var)" README || exit_unsupported # version issue
  21
  22 grep -q "snapshot()" README || exit_unsupported # version issue
  23
  24 echo "Test snapshot action"
  25
  26 echo 1 > /sys/kernel/debug/tracing/events/sched/enable
  27
  28 echo 'hist:keys=comm:newprio=prio:onchange($newprio).save(comm,prio):onchange($newprio).snapshot() if comm=="ping"' >> /sys/kernel/debug/tracing/events/sched/sched_waking/trigger
  29
  30 ping $LOCALHOST -c 3
  31 nice -n 1 ping $LOCALHOST -c 3
  32
  33 echo 0 > tracing_on
  34
  35 if ! grep -q "changed:" events/sched/sched_waking/hist; then
  36     fail "Failed to create onchange action inter-event histogram"
  37 fi
  38
  39 if ! grep -q "comm=ping" snapshot; then
  40     fail "Failed to create snapshot action inter-event histogram"
  41 fi
  42
  43 exit 0