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

   1 #!/bin/sh
   2 # description: event trigger - test inter-event histogram trigger onmatch action
   3
   4 do_reset() {
   5     reset_trigger
   6     echo > set_event
   7     clear_trace
   8 }
   9
  10 fail() { #msg
  11     do_reset
  12     echo $1
  13     exit_fail
  14 }
  15
  16 if [ ! -f set_event ]; then
  17     echo "event tracing is not supported"
  18     exit_unsupported
  19 fi
  20
  21 if [ ! -f synthetic_events ]; then
  22     echo "synthetic event is not supported"
  23     exit_unsupported
  24 fi
  25
  26 clear_synthetic_events
  27 reset_tracer
  28 do_reset
  29
  30 echo "Test create synthetic event"
  31
  32 echo 'wakeup_latency  u64 lat pid_t pid char comm[16]' > synthetic_events
  33 if [ ! -d events/synthetic/wakeup_latency ]; then
  34     fail "Failed to create wakeup_latency synthetic event"
  35 fi
  36
  37 echo "Test create histogram for synthetic event"
  38 echo "Test histogram variables,simple expression support and onmatch action"
  39
  40 echo 'hist:keys=pid:ts0=common_timestamp.usecs if comm=="ping"' > events/sched/sched_wakeup/trigger
  41 echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_wakeup).wakeup_latency($wakeup_lat,next_pid,next_comm) if next_comm=="ping"' > events/sched/sched_switch/trigger
  42 echo 'hist:keys=comm,pid,lat:wakeup_lat=lat:sort=lat' > events/synthetic/wakeup_latency/trigger
  43 ping localhost -c 5
  44 if ! grep -q "ping" events/synthetic/wakeup_latency/hist; then
  45     fail "Failed to create onmatch action inter-event histogram"
  46 fi
  47
  48 do_reset
  49
  50 exit 0