linux-kernel - Re: [PATCH 23/28] perf tools: Factor out hist_entry

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Date:	Sat, 11 Jan 2014 17:24:08 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Arun Sharma <asharma@...com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Rodrigo Campos <rodrigo@...g.com.ar>
Subject: Re: [PATCH 23/28] perf tools: Factor out hist_entry_iter code

On Wed, Jan 08, 2014 at 05:46:28PM +0900, Namhyung Kim wrote:
> Now the hist_entry_iter code will be shared with perf top code base.
> So move it to util/hist.c and do some necessary cleanups and renames.

factoring code from this very patchset.. looks like it could be easily
squashed with:
  perf tools: Introduce struct hist_entry_iter

jirka

> 
> Cc: Arun Sharma <asharma@...com>
> Cc: Frederic Weisbecker <fweisbec@...il.com>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/perf/builtin-report.c | 468 +-------------------------------------------
>  tools/perf/util/hist.c      | 441 +++++++++++++++++++++++++++++++++++++++++
>  tools/perf/util/hist.h      |  30 +++
>  3 files changed, 477 insertions(+), 462 deletions(-)
> 

SNIP

> -	err = iter->prepare_entry(iter, al);
> -	if (err)
> -		goto out;
> -
> -	err = iter->add_single_entry(iter, al);
> -	if (err)
> -		goto out;
> -
> -	while (iter->next_entry(iter, al)) {
> -		err = iter->add_next_entry(iter, al);
> -		if (err)
> -			break;
> -	}
> -
> -out:
> -	err2 = iter->finish_entry(iter, al);
> -	if (!err)
> -		err = err2;
> -
> -	return err;
> -}
> -
>  static int process_sample_event(struct perf_tool *tool,
>  				union perf_event *event,
>  				struct perf_sample *sample,
> @@ -555,23 +103,19 @@ static int process_sample_event(struct perf_tool *tool,
>  		return 0;
>  
>  	if (sort__mode == SORT_MODE__BRANCH)
> -		iter = &branch_iter;
> +		iter = &hist_iter_branch;
>  	else if (rep->mem_mode == 1)
> -		iter = &mem_iter;
> +		iter = &hist_iter_mem;
>  	else if (symbol_conf.cumulate_callchain)
> -		iter = &cumulative_iter;
> +		iter = &hist_iter_cumulative;
>  	else
> -		iter = &normal_iter;
> +		iter = &hist_iter_normal;

looks like we could add 'struct hist_entry_iter_ops' and ops
pointer in 'struct hist_entry_iter' ...just feel better ;-)

jirka
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