linux-kernel - Re: [PATCH v11 07/24] perf config: Document variables for 'help' section in man page

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Date:	Wed, 2 Dec 2015 01:17:53 +0900
From:	Taeung Song <treeze.taeung@...il.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH v11 07/24] perf config: Document variables for 'help' section in man page

Hi, Namhyung

> On Nov 18, 2015, at 9:45 AM, Namhyung Kim <namhyung@...nel.org> wrote:
> 
> On Tue, Nov 17, 2015 at 10:53:27PM +0900, Taeung Song wrote:
>> Explain 'help.format' and 'help.autocorrect' variables.
>> 
>> Cc: Namhyung Kim <namhyung@...nel.org>
>> Cc: Jiri Olsa <jolsa@...hat.com>
>> Signed-off-by: Taeung Song <treeze.taeung@...il.com>
>> ---
>> tools/perf/Documentation/perf-config.txt | 21 +++++++++++++++++++++
>> 1 file changed, 21 insertions(+)
>> 
>> diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt
>> index bfbeb34..88e9b88 100644
>> --- a/tools/perf/Documentation/perf-config.txt
>> +++ b/tools/perf/Documentation/perf-config.txt
>> @@ -242,6 +242,27 @@ annotate.*::
>> 
>> 		│1 1382:   movb   $0x1,-0x270(%rbp)
>> 
>> +help.*::
>> +	help.format:: = man
> 
> What is this '= man' part?  Is it for default value?  It looks inconsistent anyway.
> 
> 
>> +		A format of manual page can be 'man', 'info', 'web' or 'html'.
>> +		'man' is default.
> 
> I don't know we support other format of manual pages.  Maybe asciidoc
> does the job for us, but do we really care?  At least 'info' seems broken..
> 

I rechecked source code for this values and tested them.
Only a ‘man’ value work with perf without any problems.
And code for ‘web', ‘html’ and ‘info’ has a few errors.

So, IMHO:), I thought that if the code for them was fixed,
maybe they could be used as values for help.format.

Or is it better to remove/disable this values (web, html, info) ?
(First of all I'll try to make patch for the errors.)


Thanks,
Taeung

> 
>> +	help.autocorrect:: = 0
>> +		Automatically correct and execute mistyped commands after
>> +		waiting for the given number of deciseconds (0.1 sec).
>> +		Let's see a example. If a mistyped sub-command is executed like 'perf mistyped-command'
> 
> s/a example/an example/
> 
>> +		and this option is 0, the output is as below.
>> +
>> +		perf: 'mistyped-command' is not a perf-command. See 'perf --help'.
>> +
>> +		Or if this option is more than 1, the output can be such as.
>> +
>> +		WARNING: You called a perf program named 'mistyped-command', which does not exist.
>> +		Continuing under the assumption that you meant 'with-kcore'
>> +		in 0.1 seconds automatically...
>> +		Usage: perf-with-kcore <perf sub-command> <perf.data directory> [<sub-command options> [ -- <workload>]]
>> +		<perf sub-command> can be record, script, report or inject
>> +		    or: perf-with-kcore fix_buildid_cache_permissions
> 
> I wasn't aware of this feature and it seems completely broken.  If
> it's a leftover from the git codebase, we'd better either to
> disable/remove it or fix it.
> 
> Thanks,
> Namhyung
> 
> 
>> +
>> SEE ALSO
>> --------
>> linkperf:perf[1]
>> -- 
>> 1.9.1

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