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