linux-kernel - Re: [PATCH 06/19] perf ftrace: add support for trace option sleep-time

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Date:   Sun, 31 May 2020 14:56:41 +0900
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Changbin Du <changbin.du@...il.com>, Jiri Olsa <jolsa@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/19] perf ftrace: add support for trace option sleep-time

On Thu, May 21, 2020 at 6:01 AM Arnaldo Carvalho de Melo
<acme@...nel.org> wrote:
>
> Em Sun, May 10, 2020 at 11:06:15PM +0800, Changbin Du escreveu:
> > This adds an option '--nosleep-time' which allow us only to measure
> > on-CPU time. This option is function_graph tracer only.
>
> This seems, for now, very specific to the function_graph tracer, so
> perhaps we should have a:
>
>         --function_graph_opts nosleep-time,other,another,etc
>
> ?

Agreed.  Also I don't want to add an option in a negative form
as it's confusing.  Actually, our option parser can recognize
--no-xxx form automatically so adding a positive option (--xxx)
can handle that too.

Thanks
Namhyung