From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S966164AbbDWOQR (ORCPT <rfc822;w@1wt.eu>);
	Thu, 23 Apr 2015 10:16:17 -0400
Received: from mail.kernel.org ([198.145.29.136]:38420 "EHLO mail.kernel.org"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S965008AbbDWOQM (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Thu, 23 Apr 2015 10:16:12 -0400
Date: Thu, 23 Apr 2015 11:16:08 -0300
From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Adrian Hunter <adrian.hunter@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>, linux-kernel@vger.kernel.org,
        David Ahern <dsahern@gmail.com>,
        Frederic Weisbecker <fweisbec@gmail.com>, Jiri Olsa <jolsa@redhat.com>,
        Namhyung Kim <namhyung@gmail.com>,
        Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH 18/44] perf report: Add Instruction Tracing support
Message-ID: <20150423141608.GD7881@kernel.org>
References: <1428594864-29309-1-git-send-email-adrian.hunter@intel.com>
 <1428594864-29309-19-git-send-email-adrian.hunter@intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1428594864-29309-19-git-send-email-adrian.hunter@intel.com>
X-Url: http://acmel.wordpress.com
User-Agent: Mutt/1.5.23 (2014-03-12)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Em Thu, Apr 09, 2015 at 06:53:58PM +0300, Adrian Hunter escreveu:
> +++ b/tools/perf/Documentation/perf-report.txt
> @@ -323,6 +323,34 @@ OPTIONS
>  --header-only::
>  	Show only perf.data header (forces --stdio).
>  
> +-Z::
> +--itrace::
> +	Options for decoding AUX area tracing data. The options are:

<SNIP>

>  		     "how to display percentage of filtered entries", parse_filter_percentage),
> +	OPT_CALLBACK_OPTARG('Z', "itrace", &itrace_synth_opts, NULL, "opts",
> +			    "Instruction Tracing options",
> +			    itrace_parse_synth_opts),

I am also making this be 

 +	OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",

I.e. single letter options should be used for something more
mainstrean/frequently used, and we can also shorten it, so far, to --it:

[acme@ssdandy linux]$ perf script --i
  Error: Ambiguous option: i (could be --input or --itrace)

 usage: perf script [<options>]
    or: perf script [<options>] record <script> [<record-options>] <command>
    or: perf script [<options>] report <script> [script-args]
    or: perf script [<options>] <script> [<record-options>] <command>
    or: perf script [<options>] <top-script> [script-args]

[acme@ssdandy linux]$ perf script --it
failed to open perf.data: Permission denied

- Arnaldo