tools/testing/selftests/ftrace/test.d/00basic/trace_pipe.tc

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: trace_pipe and trace_marker
   4 # flags: instance
   5
   6 [ ! -f trace_marker ] && exit_unsupported
   7
   8 echo "test input 1" > trace_marker
   9
  10 : "trace interface never consume the ring buffer"
  11 grep -q "test input 1" trace
  12 grep -q "test input 1" trace
  13
  14 : "trace interface never consume the ring buffer"
  15 head -n 1 trace_pipe | grep -q "test input 1"
  16 ! grep -q "test input 1" trace