linux-kernel - Re: [PATCH v2 31/32] selftests/ftrace: Add output format testcase

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Message-Id: <20180830164840.35171b39d82d1893cb2a1405@kernel.org>
Date:   Thu, 30 Aug 2018 16:48:40 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Shuah Khan <shuah@...nel.org>, Ingo Molnar <mingo@...hat.com>,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 31/32] selftests/ftrace: Add output format testcase

On Fri, 24 Aug 2018 22:19:26 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> On Fri, 17 Aug 2018 01:43:49 +0900
> Masami Hiramatsu <mhiramat@...nel.org> wrote:
> 
> > Add a testcase for tracing output format using trace_marker.
> > This tests raw, hex and bin format output.
> 
> I'd like to deprecate these formats. They are useless ever since we
> implemented trace_pipe_raw.
> 
> Let's not add this test.

OK, I'll drop it.
I think this test code itself can reuse for testing trace_pipe_raw too.
(for next time?)

Thank you,

> 
> Thanks,
> 
> -- Steve
> 
> > 
> > Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
> > ---
> >  .../ftrace/test.d/00basic/print_format.tc          |   51 ++++++++++++++++++++
> >  1 file changed, 51 insertions(+)
> >  create mode 100644 tools/testing/selftests/ftrace/test.d/00basic/print_format.tc
> > 
> > diff --git a/tools/testing/selftests/ftrace/test.d/00basic/print_format.tc b/tools/testing/selftests/ftrace/test.d/00basic/print_format.tc
> > new file mode 100644
> > index 000000000000..55feb542e83e
> > --- /dev/null
> > +++ b/tools/testing/selftests/ftrace/test.d/00basic/print_format.tc
> > @@ -0,0 +1,51 @@
> > +#!/bin/sh
> > +# SPDX-License-Identifier: GPL2.0
> > +# description: Change print trace format
> > +
> > +if [ ! -f trace_marker ]; then
> > +  echo "trace_marker is not supported, can not continue testing"
> > +  exit_unresolved
> > +fi
> > +
> > +do_reset() {
> > +  if [ `cat options/bin` -eq 1 ]; then
> > +    grep -v "^#" trace | od -h | cut -f 2- -d " " | xargs echo
> > +  fi
> > +  echo 0 > options/hex
> > +  echo 0 > options/raw
> > +  echo 0 > options/bin
> > +  cat trace
> > +  exit 1
> > +}
> > +
> > +echo > trace
> > +echo "abcdefgh" > trace_marker
> > +echo 0 > tracing_on
> > +
> > +: "Get the pid and cpu#"
> > +IDS=`grep -v "^#" trace | sed -e 's/[[:space:]]*.*-\([[:digit:]]*\)[[:space:]]*\[\([[:digit:]]*\)\].*/\1 \2/'`
> > +
> > +read_pid_cpu() {
> > +  _PID=$1
> > +  _CPU=`printf "%d" $2`
> > +}
> > +
> > +read_pid_cpu $IDS
> > +
> > +: "Test raw output format"
> > +echo 1 > options/raw
> > +grep -v "^#" trace | grep "^$_PID $_CPU" || do_reset
> > +echo 0 > options/raw
> > +
> > +: "Test hex output format"
> > +echo 1 > options/hex
> > +PAT=`printf "%08x %08x" $_PID $_CPU`
> > +grep -v "^#" trace | grep "^$PAT" || do_reset
> > +echo 0 > options/hex
> > +
> > +: "Test bin output format"
> > +echo 1 > options/bin
> > +PAT=`printf "%04x [[:xdigit:]]* [[:xdigit:]]*%02x" $_PID $_CPU`
> > +# Make a stream of hexdump
> > +grep -v "^#" trace | od -h | cut -f 2- -d " " | xargs echo | grep "$PAT" || do_reset
> > +echo 0 > options/bin
> 


-- 
Masami Hiramatsu <mhiramat@...nel.org>