From: Joel Fernandes (Google) joel@joelfernandes.org
Often times during debugging, it is difficult to jump to the ftrace dump in the console log and treat it independent of the result of the log file. Copy the contents of the buffers into its own file to make it easier to refer to the ftrace dump. The original ftrace dump is still available in the console log if it is desired to refer to it there.
Signed-off-by: Joel Fernandes (Google) joel@joelfernandes.org --- v1-v2: Change log updates, "From:" updates.
.../selftests/rcutorture/bin/functions.sh | 24 +++++++++++++++++++ .../selftests/rcutorture/bin/parse-console.sh | 7 ++++++ 2 files changed, 31 insertions(+) mode change 100644 => 100755 tools/testing/selftests/rcutorture/bin/functions.sh
diff --git a/tools/testing/selftests/rcutorture/bin/functions.sh b/tools/testing/selftests/rcutorture/bin/functions.sh old mode 100644 new mode 100755 index b8e2ea23cb3f..2ec4ab87a7f0 --- a/tools/testing/selftests/rcutorture/bin/functions.sh +++ b/tools/testing/selftests/rcutorture/bin/functions.sh @@ -331,3 +331,27 @@ specify_qemu_net () { echo $1 -net none fi } + +# Extract the ftrace output from the console log output +# The ftrace output looks in the logs looks like: +# Dumping ftrace buffer: +# --------------------------------- +# [...] +# --------------------------------- +extract_ftrace_from_console() { + awk ' + /Dumping ftrace buffer:/ { + capture = 1 + next + } + /---------------------------------/ { + if(capture == 1) { + capture = 2 + next + } else if(capture == 2) { + capture = 0 + } + } + capture == 2 + ' "$1"; +} diff --git a/tools/testing/selftests/rcutorture/bin/parse-console.sh b/tools/testing/selftests/rcutorture/bin/parse-console.sh index 9ab0f6bc172c..e3d2f69ec0fb 100755 --- a/tools/testing/selftests/rcutorture/bin/parse-console.sh +++ b/tools/testing/selftests/rcutorture/bin/parse-console.sh @@ -182,3 +182,10 @@ if ! test -s $file.diags then rm -f $file.diags fi + +# Call extract_ftrace_from_console function, if the output is empty, +# don't create $file.ftrace. Otherwise output the results to $file.ftrace +extract_ftrace_from_console $file > $file.ftrace +if [ ! -s $file.ftrace ]; then + rm -f $file.ftrace +fi