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 $FAIL
  14 }
  15
  16 if [ ! -f set_event -o ! -d events/sched ]; then
  17     echo "event tracing is not supported"
  18     exit_unsupported
  19 fi
  20
  21 if [ ! -f events/sched/sched_process_fork/trigger ]; then
  22     echo "event trigger is not supported"
  23     exit_unsupported
  24 fi
  25
  26 reset_tracer
  27 do_reset
  28
  29 FEATURE=`grep hist events/sched/sched_process_fork/trigger`
  30 if [ -z "$FEATURE" ]; then
  31     echo "hist trigger is not supported"
  32     exit_unsupported
  33 fi
  34
  35 echo "Test histogram with execname modifier"
  36
  37 echo 'hist:keys=common_pid.execname' > events/sched/sched_process_fork/trigger
  38 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  39 COMM=`cat /proc/$$/comm`
  40 grep "common_pid: $COMM" events/sched/sched_process_fork/hist > /dev/null || \
  41     fail "execname modifier on sched_process_fork did not work"
  42
  43 reset_trigger
  44
  45 echo "Test histogram with hex modifier"
  46
  47 echo 'hist:keys=parent_pid.hex' > events/sched/sched_process_fork/trigger
  48 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  49 # Note that $$ is the parent pid. $PID is current PID.
  50 HEX=`printf %x $PID`
  51 grep "parent_pid: $HEX" events/sched/sched_process_fork/hist > /dev/null || \
  52     fail "hex modifier on sched_process_fork did not work"
  53
  54 reset_trigger
  55
  56 echo "Test histogram with syscall modifier"
  57
  58 echo 'hist:keys=id.syscall' > events/raw_syscalls/sys_exit/trigger
  59 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  60 grep "id: sys_" events/raw_syscalls/sys_exit/hist > /dev/null || \
  61     fail "syscall modifier on raw_syscalls/sys_exit did not work"
  62
  63
  64 reset_trigger
  65
  66 echo "Test histgram with log2 modifier"
  67
  68 echo 'hist:keys=bytes_req.log2' > events/kmem/kmalloc/trigger
  69 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  70 grep 'bytes_req: ~ 2^[0-9]*' events/kmem/kmalloc/hist > /dev/null || \
  71     fail "log2 modifier on kmem/kmalloc did not work"
  72
  73 do_reset
  74
  75 exit 0