linux-kernel - Re: [PATCH 15/20] perf diff: Add missing setup_output

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Date:	Thu, 15 May 2014 15:47:52 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Don Zickus <dzickus@...hat.com>
Subject: Re: [PATCH 15/20] perf diff: Add missing setup_output_field()

On Mon, May 12, 2014 at 03:28:48PM +0900, Namhyung Kim wrote:
> The perf diff command itself doesn't make use of the --fields option,
> it still needs to call the function since the output only work with
> that way.
> 
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/perf/builtin-diff.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
> index f3b10dcf6838..670d191bec31 100644
> --- a/tools/perf/builtin-diff.c
> +++ b/tools/perf/builtin-diff.c
> @@ -1155,6 +1155,9 @@ int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
>  	if (setup_sorting() < 0)
>  		usage_with_options(diff_usage, options);
>  
> +	if (setup_output_field() < 0)
> +		usage_with_options(diff_usage, options);
> +

looks like this breaks perf diff even worse than it is now ;-)

[jolsa@...va perf]$ ./perf diff 
# Event 'cycles'
#
# Baseline    Delta
# ........  .......
#
    28.03%         
            +18.93%
    31.06%         
            +36.86%
    35.06%         
     0.38%         
     0.03%   +0.03%
             +1.11%
     5.44%         
            +43.05%


anyway, as I said it was already broken, I plan to check/fix this soon..

jirka
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