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

   1 #!/bin/sh
   2 # description: event trigger - test histogram trigger
   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 $FAIL
  14 }
  15
  16 if [ ! -f set_event -o ! -d events/sched ]; then
  17     echo "event tracing is not supported"
  18     exit_unsupported
  19 fi
  20
  21 if [ ! -f events/sched/sched_process_fork/trigger ]; then
  22     echo "event trigger is not supported"
  23     exit_unsupported
  24 fi
  25
  26 reset_tracer
  27 do_reset
  28
  29 FEATURE=`grep hist events/sched/sched_process_fork/trigger`
  30 if [ -z "$FEATURE" ]; then
  31     echo "hist trigger is not supported"
  32     exit_unsupported
  33 fi
  34
  35 echo "Test histogram basic tigger"
  36
  37 echo 'hist:keys=parent_pid:vals=child_pid' > events/sched/sched_process_fork/trigger
  38 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  39 grep parent_pid events/sched/sched_process_fork/hist > /dev/null || \
  40     fail "hist trigger on sched_process_fork did not work"
  41 grep child events/sched/sched_process_fork/hist > /dev/null || \
  42     fail "hist trigger on sched_process_fork did not work"
  43
  44 reset_trigger
  45
  46 echo "Test histogram with compound keys"
  47
  48 echo 'hist:keys=parent_pid,child_pid' > events/sched/sched_process_fork/trigger
  49 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  50 grep '^{ parent_pid:.*, child_pid:.*}' events/sched/sched_process_fork/hist > /dev/null || \
  51     fail "compound keys on sched_process_fork did not work"
  52
  53 reset_trigger
  54
  55 echo "Test histogram with string key"
  56
  57 echo 'hist:keys=parent_comm' > events/sched/sched_process_fork/trigger
  58 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  59 COMM=`cat /proc/$$/comm`
  60 grep "parent_comm: $COMM" events/sched/sched_process_fork/hist > /dev/null || \
  61     fail "string key on sched_process_fork did not work"
  62
  63 reset_trigger
  64
  65 echo "Test histogram with sort key"
  66
  67 echo 'hist:keys=parent_pid,child_pid:sort=child_pid.ascending' > events/sched/sched_process_fork/trigger
  68 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  69
  70 check_inc() {
  71     while [ $# -gt 1 ]; do
  72         [ $1 -gt $2 ] && return 1
  73         shift 1
  74     done
  75     return 0
  76 }
  77 check_inc `grep -o "child_pid:[[:space:]]*[[:digit:]]*" \
  78     events/sched/sched_process_fork/hist | cut -d: -f2 ` ||
  79     fail "sort param on sched_process_fork did not work"
  80
  81 do_reset
  82
  83 exit 0