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

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: event trigger - test field variable support
   4 # requires: set_event synthetic_events events/sched/sched_process_fork/hist ping:program
   5
   6 fail() { #msg
   7     echo $1
   8     exit_fail
   9 }
  10
  11 echo "Test field variable support"
  12
  13 echo 'wakeup_latency u64 lat; pid_t pid; int prio; char comm[16]' > synthetic_events
  14 echo 'hist:keys=comm:ts0=common_timestamp.usecs if comm=="ping"' > events/sched/sched_waking/trigger
  15 echo 'hist:keys=next_comm:wakeup_lat=common_timestamp.usecs-$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
  16 echo 'hist:keys=pid,prio,comm:vals=lat:sort=pid,prio' > events/synthetic/wakeup_latency/trigger
  17
  18 ping $LOCALHOST -c 3
  19 if ! grep -q "ping" events/synthetic/wakeup_latency/hist; then
  20     fail "Failed to create inter-event histogram"
  21 fi
  22
  23 if ! grep -q "synthetic_prio=prio" events/sched/sched_waking/hist; then
  24     fail "Failed to create histogram with field variable"
  25 fi
  26
  27 echo '!hist:keys=next_comm:wakeup_lat=common_timestamp.usecs-$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
  28
  29 if grep -q "synthetic_prio=prio" events/sched/sched_waking/hist; then
  30     fail "Failed to remove histogram with field variable"
  31 fi
  32
  33 exit 0