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

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: event trigger - test inter-event histogram trigger trace action
   4
   5 fail() { #msg
   6     echo $1
   7     exit_fail
   8 }
   9
  10 if [ ! -f set_event ]; then
  11     echo "event tracing is not supported"
  12     exit_unsupported
  13 fi
  14
  15 if [ ! -f synthetic_events ]; then
  16     echo "synthetic event is not supported"
  17     exit_unsupported
  18 fi
  19
  20 grep -q "trace(<synthetic_event>" README || exit_unsupported # version issue
  21
  22 echo "Test create synthetic event"
  23
  24 echo 'wakeup_latency  u64 lat pid_t pid char comm[16]' > synthetic_events
  25 if [ ! -d events/synthetic/wakeup_latency ]; then
  26     fail "Failed to create wakeup_latency synthetic event"
  27 fi
  28
  29 echo "Test create histogram for synthetic event using trace action"
  30 echo "Test histogram variables,simple expression support and trace action"
  31
  32 echo 'hist:keys=pid:ts0=common_timestamp.usecs if comm=="ping"' > events/sched/sched_wakeup/trigger
  33 echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_wakeup).trace(wakeup_latency,$wakeup_lat,next_pid,next_comm) if next_comm=="ping"' > events/sched/sched_switch/trigger
  34 echo 'hist:keys=comm,pid,lat:wakeup_lat=lat:sort=lat' > events/synthetic/wakeup_latency/trigger
  35
  36 ping $LOCALHOST -c 5
  37
  38 if ! grep -q "ping" events/synthetic/wakeup_latency/hist; then
  39     fail "Failed to create trace action inter-event histogram"
  40 fi
  41
  42 exit 0