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 # flags: instance
   5
   6 fail() { #msg
   7     echo $1
   8     exit_fail
   9 }
  10
  11 if [ ! -f set_event -o ! -d events/sched ]; then
  12     echo "event tracing is not supported"
  13     exit_unsupported
  14 fi
  15
  16 if [ ! -f events/sched/sched_process_fork/trigger ]; then
  17     echo "event trigger is not supported"
  18     exit_unsupported
  19 fi
  20
  21 if [ ! -f events/sched/sched_process_fork/hist ]; then
  22     echo "hist trigger is not supported"
  23     exit_unsupported
  24 fi
  25
  26 echo "Test histogram multiple triggers"
  27
  28 echo 'hist:keys=parent_pid:vals=child_pid' > events/sched/sched_process_fork/trigger
  29 echo 'hist:keys=parent_comm:vals=child_pid' >> events/sched/sched_process_fork/trigger
  30 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  31 grep parent_pid events/sched/sched_process_fork/hist > /dev/null || \
  32     fail "hist trigger on sched_process_fork did not work"
  33 grep child events/sched/sched_process_fork/hist > /dev/null || \
  34     fail "hist trigger on sched_process_fork did not work"
  35 COMM=`cat /proc/$$/comm`
  36 grep "parent_comm: $COMM" events/sched/sched_process_fork/hist > /dev/null || \
  37     fail "string key on sched_process_fork did not work"
  38
  39 reset_trigger
  40
  41 echo "Test histogram with its name"
  42
  43 echo 'hist:name=test_hist:keys=common_pid' > events/sched/sched_process_fork/trigger
  44 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  45 grep test_hist events/sched/sched_process_fork/hist > /dev/null || \
  46     fail "named event on sched_process_fork did not work"
  47
  48 echo "Test same named histogram on different events"
  49
  50 echo 'hist:name=test_hist:keys=common_pid' > events/sched/sched_process_exit/trigger
  51 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  52 grep test_hist events/sched/sched_process_exit/hist > /dev/null || \
  53     fail "named event on sched_process_fork did not work"
  54
  55 diffs=`diff events/sched/sched_process_exit/hist events/sched/sched_process_fork/hist | wc -l`
  56 test $diffs -eq 0 || fail "Same name histograms are not same"
  57
  58 exit 0