linux-kernel - Re: [PATCH v3] rcutorture: Copy out ftrace into its own console file

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Date:   Wed, 16 Aug 2023 19:27:03 -0400
From:   Joel Fernandes <joel@...lfernandes.org>
To:     paulmck@...nel.org
Cc:     linux-kernel@...r.kernel.org,
        Josh Triplett <josh@...htriplett.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Shuah Khan <shuah@...nel.org>, Joel <agnel.joel@...il.com>,
        rcu@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v3] rcutorture: Copy out ftrace into its own console file

On Wed, Aug 16, 2023 at 6:57 PM Paul E. McKenney <paulmck@...nel.org> wrote:
>
> On Tue, Aug 15, 2023 at 07:09:49PM +0000, Joel Fernandes (Google) wrote:
> > When debugging, it can be difficult to quickly find the ftrace dump
> > within the console log, which in turn makes it difficult to process it
> > independent of the result of the console output.  This commit therefore
> > copies the contents of the buffers into its own file to make it easier
> > to locate and process the ftrace dump. The original ftrace dump is still
> > available in the console log in cases where it is more convenient to
> > process it there, for example, when you have a script that processes
> > console output as well as ftrace-dump data.
> >
> > Also handle the case of multiple ftrace dumps potentially showing up in the
> > log. Example for a file like [1], it will extract as [2].
> >
> > [1]:
> > foo
> > foo
> > Dumping ftrace buffer:
> > ---------------------------------
> > blah
> > blah
> > ---------------------------------
> > more
> > bar
> > baz
> > Dumping ftrace buffer:
> > ---------------------------------
> > blah2
> > blah2
> > ---------------------------------
> > bleh
> > bleh
> >
> > [2]:
> >
> > Ftrace dump 1:
> > blah
> > blah
> >
> > Ftrace dump 2:
> > blah2
> > blah2
> >
> >
> > Signed-off-by: Joel Fernandes (Google) <joel@...lfernandes.org>
>
> Very good, and I did queue this one.
>
> I fixed the indentation of the awk script.  Perhaps your text editor is
> being too smart for our good?  ;-)

Thanks!  Yes the editor messing up is a possibility, I'll go look at
that, though the indent seems still messed up in your dev branch:

The line "/Dumping ftrace buffer:/ " has spaces, as does the "awk <
$1" line. Is that intentional?  All the following ones have tabs.

thanks,

 - Joel