tools/testing/selftests/ftrace/test.d/trigger/trigger-multihist.tc

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: event trigger - test multiple histogram triggers
   4 # requires: set_event events/sched/sched_process_fork/trigger events/sched/sched_process_fork/hist
   5 # flags: instance
   6
   7 fail() { #msg
   8     echo $1
   9     exit_fail
  10 }
  11
  12 echo "Test histogram multiple triggers"
  13
  14 echo 'hist:keys=parent_pid:vals=child_pid' > events/sched/sched_process_fork/trigger
  15 echo 'hist:keys=parent_comm:vals=child_pid' >> events/sched/sched_process_fork/trigger
  16 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  17 grep parent_pid events/sched/sched_process_fork/hist > /dev/null || \
  18     fail "hist trigger on sched_process_fork did not work"
  19 grep child events/sched/sched_process_fork/hist > /dev/null || \
  20     fail "hist trigger on sched_process_fork did not work"
  21 COMM=`cat /proc/$$/comm`
  22 grep "parent_comm: $COMM" events/sched/sched_process_fork/hist > /dev/null || \
  23     fail "string key on sched_process_fork did not work"
  24
  25 reset_trigger
  26
  27 echo "Test histogram with its name"
  28
  29 echo 'hist:name=test_hist:keys=common_pid' > events/sched/sched_process_fork/trigger
  30 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  31 grep test_hist events/sched/sched_process_fork/hist > /dev/null || \
  32     fail "named event on sched_process_fork did not work"
  33
  34 echo "Test same named histogram on different events"
  35
  36 echo 'hist:name=test_hist:keys=common_pid' > events/sched/sched_process_exit/trigger
  37 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  38 grep test_hist events/sched/sched_process_exit/hist > /dev/null || \
  39     fail "named event on sched_process_fork did not work"
  40
  41 diffs=`diff events/sched/sched_process_exit/hist events/sched/sched_process_fork/hist | wc -l`
  42 test $diffs -eq 0 || fail "Same name histograms are not same"
  43
  44 exit 0