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 do_reset() {
   7     reset_trigger
   8     echo > set_event
   9     clear_trace
  10 }
  11
  12 fail() { #msg
  13     do_reset
  14     echo $1
  15     exit $FAIL
  16 }
  17
  18 if [ ! -f set_event -o ! -d events/sched ]; then
  19     echo "event tracing is not supported"
  20     exit_unsupported
  21 fi
  22
  23 if [ ! -f events/sched/sched_process_fork/trigger ]; then
  24     echo "event trigger is not supported"
  25     exit_unsupported
  26 fi
  27
  28 if [ ! -f events/sched/sched_process_fork/hist ]; then
  29     echo "hist trigger is not supported"
  30     exit_unsupported
  31 fi
  32
  33 reset_tracer
  34 do_reset
  35
  36 reset_trigger
  37
  38 echo "Test histogram multiple tiggers"
  39
  40 echo 'hist:keys=parent_pid:vals=child_pid' > events/sched/sched_process_fork/trigger
  41 echo 'hist:keys=parent_comm:vals=child_pid' >> events/sched/sched_process_fork/trigger
  42 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  43 grep parent_pid events/sched/sched_process_fork/hist > /dev/null || \
  44     fail "hist trigger on sched_process_fork did not work"
  45 grep child events/sched/sched_process_fork/hist > /dev/null || \
  46     fail "hist trigger on sched_process_fork did not work"
  47 COMM=`cat /proc/$$/comm`
  48 grep "parent_comm: $COMM" events/sched/sched_process_fork/hist > /dev/null || \
  49     fail "string key on sched_process_fork did not work"
  50
  51 reset_trigger
  52
  53 echo "Test histogram with its name"
  54
  55 echo 'hist:name=test_hist:keys=common_pid' > events/sched/sched_process_fork/trigger
  56 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  57 grep test_hist events/sched/sched_process_fork/hist > /dev/null || \
  58     fail "named event on sched_process_fork did not work"
  59
  60 echo "Test same named histogram on different events"
  61
  62 echo 'hist:name=test_hist:keys=common_pid' > events/sched/sched_process_exit/trigger
  63 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  64 grep test_hist events/sched/sched_process_exit/hist > /dev/null || \
  65     fail "named event on sched_process_fork did not work"
  66
  67 diffs=`diff events/sched/sched_process_exit/hist events/sched/sched_process_fork/hist | wc -l`
  68 test $diffs -eq 0 || fail "Same name histograms are not same"
  69
  70 reset_trigger
  71
  72 do_reset
  73
  74 exit 0