tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-field-variable-support.tc

   1 #!/bin/sh
   2 # description: event trigger - test field variable support
   3
   4 do_reset() {
   5     reset_trigger
   6     echo > set_event
   7     clear_trace
   8 }
   9
  10 fail() { #msg
  11     do_reset
  12     echo $1
  13     exit_fail
  14 }
  15
  16 if [ ! -f set_event ]; then
  17     echo "event tracing is not supported"
  18     exit_unsupported
  19 fi
  20
  21 if [ ! -f synthetic_events ]; then
  22     echo "synthetic event is not supported"
  23     exit_unsupported
  24 fi
  25
  26 clear_synthetic_events
  27 reset_tracer
  28 do_reset
  29
  30 echo "Test field variable support"
  31
  32 echo 'wakeup_latency u64 lat; pid_t pid; int prio; char comm[16]' > synthetic_events
  33 echo 'hist:keys=comm:ts0=common_timestamp.usecs if comm=="ping"' > events/sched/sched_waking/trigger
  34 echo 'hist:keys=next_comm:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).wakeup_latency($wakeup_lat,next_pid,sched.sched_waking.prio,next_comm) if next_comm=="ping"' > events/sched/sched_switch/trigger
  35 echo 'hist:keys=pid,prio,comm:vals=lat:sort=pid,prio' > events/synthetic/wakeup_latency/trigger
  36
  37 ping localhost -c 3
  38 if ! grep -q "ping" events/synthetic/wakeup_latency/hist; then
  39     fail "Failed to create inter-event histogram"
  40 fi
  41
  42 if ! grep -q "synthetic_prio=prio" events/sched/sched_waking/hist; then
  43     fail "Failed to create histogram with field variable"
  44 fi
  45
  46 echo '!hist:keys=next_comm:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).wakeup_latency($wakeup_lat,next_pid,sched.sched_waking.prio,next_comm) if next_comm=="ping"' >> events/sched/sched_switch/trigger
  47
  48 if grep -q "synthetic_prio=prio" events/sched/sched_waking/hist; then
  49     fail "Failed to remove histogram with field variable"
  50 fi
  51
  52 do_reset
  53
  54 exit 0