linux-kernel - Re: [PATCH v8 04/18] perf ftrace: add option '-m/--buffer-size' to set per-cpu buffer size

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Date:   Fri, 14 Aug 2020 09:58:59 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Changbin Du <changbin.du@...il.com>
Cc:     Jiri Olsa <jolsa@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 04/18] perf ftrace: add option '-m/--buffer-size' to
 set per-cpu buffer size

Em Fri, Aug 14, 2020 at 09:12:50AM -0300, Arnaldo Carvalho de Melo escreveu:
> > It indicates that the argument is in units of 'pages', while you don't
> > state that in:
> >   
> >   $ perf ftrace -h -m
> >   
> >       -m, --buffer-size <size>
> >                             size of per cpu buffer

I did this already:

  # perf ftrace -h -m
  
   Usage: perf ftrace [<options>] [<command>]
      or: perf ftrace [<options>] -- <command> [<options>]
  
      -m, --buffer-size <size>
                            Size of per cpu buffer, needs to use a B, K, M or G suffix.
  
  #

- Arnaldo