tools/testing/selftests/ftrace/test.d/tracer/wakeup.tc

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: Test wakeup tracer
   4
   5 if ! which chrt ; then
   6   echo "chrt is not found. This test requires nice command."
   7   exit_unresolved
   8 fi
   9
  10 if ! grep -wq "wakeup" available_tracers ; then
  11   echo "wakeup tracer is not supported"
  12   exit_unsupported
  13 fi
  14
  15 echo wakeup > current_tracer
  16 echo 1 > tracing_on
  17 echo 0 > tracing_max_latency
  18
  19 : "Wakeup higher priority task"
  20 chrt -f 5 sleep 1
  21
  22 echo 0 > tracing_on
  23 grep '+ \[[[:digit:]]*\]' trace
  24 grep '==> \[[[:digit:]]*\]' trace
  25