tools/testing/selftests/ftrace/test.d/ftrace/func_profile_stat.tc

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: ftrace - function profiling
   4
   5 [ ! -f function_profile_enabled ] && exit_unsupported
   6
   7 : "Enable function profile"
   8 echo 1 > function_profile_enabled
   9
  10 : "Profile must be updated"
  11 cp trace_stat/function0 $TMPDIR/
  12 ( echo "forked"; sleep 1 )
  13 : "diff returns 0 if there is no difference"
  14 ! diff trace_stat/function0 $TMPDIR/function0
  15
  16 echo 0 > function_profile_enabled
  17
  18 : "Profile must NOT be updated"
  19 cp trace_stat/function0 $TMPDIR/
  20 ( echo "forked"; sleep 1 )
  21 : "diff returns 0 if there is no difference"
  22 diff trace_stat/function0 $TMPDIR/function0