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

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: event trigger - test histogram trigger
   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 echo "Test histogram basic tigger"
  37
  38 echo 'hist:keys=parent_pid:vals=child_pid' > events/sched/sched_process_fork/trigger
  39 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  40 grep parent_pid events/sched/sched_process_fork/hist > /dev/null || \
  41     fail "hist trigger on sched_process_fork did not work"
  42 grep child events/sched/sched_process_fork/hist > /dev/null || \
  43     fail "hist trigger on sched_process_fork did not work"
  44
  45 reset_trigger
  46
  47 echo "Test histogram with compound keys"
  48
  49 echo 'hist:keys=parent_pid,child_pid' > events/sched/sched_process_fork/trigger
  50 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  51 grep '^{ parent_pid:.*, child_pid:.*}' events/sched/sched_process_fork/hist > /dev/null || \
  52     fail "compound keys on sched_process_fork did not work"
  53
  54 reset_trigger
  55
  56 echo "Test histogram with string key"
  57
  58 echo 'hist:keys=parent_comm' > events/sched/sched_process_fork/trigger
  59 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  60 COMM=`cat /proc/$$/comm`
  61 grep "parent_comm: $COMM" events/sched/sched_process_fork/hist > /dev/null || \
  62     fail "string key on sched_process_fork did not work"
  63
  64 reset_trigger
  65
  66 echo "Test histogram with sort key"
  67
  68 echo 'hist:keys=parent_pid,child_pid:sort=child_pid.ascending' > events/sched/sched_process_fork/trigger
  69 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  70
  71 check_inc() {
  72     while [ $# -gt 1 ]; do
  73         [ $1 -gt $2 ] && return 1
  74         shift 1
  75     done
  76     return 0
  77 }
  78 check_inc `grep -o "child_pid:[[:space:]]*[[:digit:]]*" \
  79     events/sched/sched_process_fork/hist | cut -d: -f2 ` ||
  80     fail "sort param on sched_process_fork did not work"
  81
  82 do_reset
  83
  84 exit 0