linux-kernel - Re: [PATCH 2/6] perf config: Document examples to get config key-value pairs in man page

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Date:   Mon, 14 Nov 2016 12:51:41 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Taeung Song <treeze.taeung@...il.com>
Cc:     linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Wang Nan <wangnan0@...wei.com>,
        Nambong Ha <over3025@...il.com>, Wookje Kwon <aweee0@...il.com>
Subject: Re: [PATCH 2/6] perf config: Document examples to get config
 key-value pairs in man page

Em Fri, Nov 04, 2016 at 03:44:18PM +0900, Taeung Song escreveu:
> Explain how to query particular config items in config file
> and how to get several config items from user or system config file
> using '--user' or '--system' options.

This one should be combined with the previous one, i.e. the patch that
introduces this feature, doing it myself.

- Arnaldo
 
> Cc: Namhyung Kim <namhyung@...nel.org>
> Cc: Jiri Olsa <jolsa@...nel.org>
> Cc: Wang Nan <wangnan0@...wei.com>
> Signed-off-by: Taeung Song <treeze.taeung@...il.com>
> ---
>  tools/perf/Documentation/perf-config.txt | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt
> index cb081ac5..1714b0c 100644
> --- a/tools/perf/Documentation/perf-config.txt
> +++ b/tools/perf/Documentation/perf-config.txt
> @@ -8,6 +8,8 @@ perf-config - Get and set variables in a configuration file.
>  SYNOPSIS
>  --------
>  [verse]
> +'perf config' [<file-option>] [section.name ...]
> +or
>  'perf config' [<file-option>] -l | --list
>  
>  DESCRIPTION
> @@ -118,6 +120,22 @@ Given a $HOME/.perfconfig like this:
>  		children = true
>  		group = true
>  
> +To query the record mode of call graph, do
> +
> +	% perf config call-graph.record-mode
> +
> +If you want to know multiple config key/value pairs, you can do like
> +
> +	% perf config report.queue-size call-graph.order report.children
> +
> +To query the config value of sort order of call graph in user config file (i.e. `~/.perfconfig`), do
> +
> +	% perf config --user call-graph.sort-order
> +
> +To query the config value of buildid directory in system config file (i.e. `$(sysconf)/perfconfig`), do
> +
> +	% perf config --system buildid.dir
> +
>  Variables
>  ~~~~~~~~~
>  
> -- 
> 2.7.4