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

   1 #!/bin/sh
   2 # description: event trigger - test histogram modifiers
   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 with execname modifier"
  35
  36 echo 'hist:keys=common_pid.execname' > events/sched/sched_process_fork/trigger
  37 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  38 COMM=`cat /proc/$$/comm`
  39 grep "common_pid: $COMM" events/sched/sched_process_fork/hist > /dev/null || \
  40     fail "execname modifier on sched_process_fork did not work"
  41
  42 reset_trigger
  43
  44 echo "Test histogram with hex modifier"
  45
  46 echo 'hist:keys=parent_pid.hex' > events/sched/sched_process_fork/trigger
  47 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  48 # Note that $$ is the parent pid. $PID is current PID.
  49 HEX=`printf %x $PID`
  50 grep "parent_pid: $HEX" events/sched/sched_process_fork/hist > /dev/null || \
  51     fail "hex modifier on sched_process_fork did not work"
  52
  53 reset_trigger
  54
  55 echo "Test histogram with syscall modifier"
  56
  57 echo 'hist:keys=id.syscall' > events/raw_syscalls/sys_exit/trigger
  58 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  59 grep "id: sys_" events/raw_syscalls/sys_exit/hist > /dev/null || \
  60     fail "syscall modifier on raw_syscalls/sys_exit did not work"
  61
  62
  63 reset_trigger
  64
  65 echo "Test histgram with log2 modifier"
  66
  67 echo 'hist:keys=bytes_req.log2' > events/kmem/kmalloc/trigger
  68 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  69 grep 'bytes_req: ~ 2^[0-9]*' events/kmem/kmalloc/hist > /dev/null || \
  70     fail "log2 modifier on kmem/kmalloc did not work"
  71
  72 do_reset
  73
  74 exit 0