linux-kernel - Re: [PATCH v2 26/32] selftests/ftrace: Add trace

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Date:   Sun, 26 Aug 2018 20:20:54 +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 26/32] selftests/ftrace: Add trace_pipe testcase

On Fri, 24 Aug 2018 19:26:29 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> On Fri, 17 Aug 2018 01:41:27 +0900
> Masami Hiramatsu <mhiramat@...nel.org> wrote:
> 
> > Add a simple testcase for trace_pipe which can consume
> > ringbuffer.
> > 
> > Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
> > ---
> >  .../selftests/ftrace/test.d/00basic/trace_pipe.tc  |   15 +++++++++++++++
> >  1 file changed, 15 insertions(+)
> >  create mode 100644 tools/testing/selftests/ftrace/test.d/00basic/trace_pipe.tc
> > 
> > diff --git a/tools/testing/selftests/ftrace/test.d/00basic/trace_pipe.tc b/tools/testing/selftests/ftrace/test.d/00basic/trace_pipe.tc
> > new file mode 100644
> > index 000000000000..a7dd6fda487a
> > --- /dev/null
> > +++ b/tools/testing/selftests/ftrace/test.d/00basic/trace_pipe.tc
> > @@ -0,0 +1,15 @@
> > +#!/bin/sh
> > +# SPDX-License-Identifier: GPL-2.0
> > +# description: trace_pipe and trace_marker
> 
> Should add:
> 
>  # flags: instance

Ah, right!

Thanks!

> 
> -- Steve
> 
> > +
> > +[ ! -f trace_marker ] && exit_unsupported
> > +
> > +echo "test input 1" > trace_marker
> > +
> > +: "trace interface never consume the ring buffer"
> > +grep -q "test input 1" trace
> > +grep -q "test input 1" trace
> > +
> > +: "trace interface never consume the ring buffer"
> > +head -n 1 trace_pipe | grep -q "test input 1"
> > +! grep -q "test input 1" trace
> 


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