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

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: event trigger - test histogram modifiers
   4 # requires: set_event events/sched/sched_process_fork/trigger events/sched/sched_process_fork/hist
   5 # flags: instance
   6
   7 fail() { #msg
   8     echo $1
   9     exit_fail
  10 }
  11
  12 echo "Test histogram with execname modifier"
  13
  14 echo 'hist:keys=common_pid.execname' > events/sched/sched_process_fork/trigger
  15 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  16 COMM=`cat /proc/$$/comm`
  17 grep "common_pid: $COMM" events/sched/sched_process_fork/hist > /dev/null || \
  18     fail "execname modifier on sched_process_fork did not work"
  19
  20 reset_trigger
  21
  22 echo "Test histogram with hex modifier"
  23
  24 echo 'hist:keys=parent_pid.hex' > events/sched/sched_process_fork/trigger
  25 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  26 # Note that $$ is the parent pid. $PID is current PID.
  27 HEX=`printf %x $PID`
  28 grep "parent_pid: $HEX" events/sched/sched_process_fork/hist > /dev/null || \
  29     fail "hex modifier on sched_process_fork did not work"
  30
  31 reset_trigger
  32
  33 echo "Test histogram with syscall modifier"
  34
  35 echo 'hist:keys=id.syscall' > events/raw_syscalls/sys_exit/trigger
  36 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  37 grep "id: \(unknown_\|sys_\)" events/raw_syscalls/sys_exit/hist > /dev/null || \
  38     fail "syscall modifier on raw_syscalls/sys_exit did not work"
  39
  40
  41 reset_trigger
  42
  43 echo "Test histgram with log2 modifier"
  44
  45 echo 'hist:keys=bytes_req.log2' > events/kmem/kmalloc/trigger
  46 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
  47 grep 'bytes_req: ~ 2^[0-9]*' events/kmem/kmalloc/hist > /dev/null || \
  48     fail "log2 modifier on kmem/kmalloc did not work"
  49
  50 exit 0