linux-kernel - Re: [PATCH 03/18] perf tools: Keep group information

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Date:	Thu, 29 Nov 2012 15:33:03 +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>,
	LKML <linux-kernel@...r.kernel.org>,
	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <andi@...stfloor.org>,
	Namhyung Kim <namhyung.kim@....com>
Subject: Re: [PATCH 03/18] perf tools: Keep group information

On Thu, Nov 29, 2012 at 03:38:31PM +0900, Namhyung Kim wrote:
> From: Namhyung Kim <namhyung.kim@....com>

SNIP

> --- a/tools/perf/util/evlist.h
> +++ b/tools/perf/util/evlist.h
> @@ -21,6 +21,7 @@ struct perf_evlist {
>  	struct list_head entries;
>  	struct hlist_head heads[PERF_EVLIST__HLIST_SIZE];
>  	int		 nr_entries;
> +	int		 nr_groups;
>  	int		 nr_fds;
>  	int		 nr_mmaps;
>  	int		 mmap_len;
> diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
> index 46c8004ca56b..887834ed0af1 100644
> --- a/tools/perf/util/evsel.h
> +++ b/tools/perf/util/evsel.h
> @@ -73,6 +73,7 @@ struct perf_evsel {
>  	bool 			needs_swap;
>  	/* parse modifier helper */
>  	int			exclude_GH;
> +	int			nr_members;
>  	struct perf_evsel	*leader;
>  	char			*group_name;
>  };

we could test both new fields in existing group tests

> @@ -230,4 +231,9 @@ static inline bool perf_evsel__is_group_leader(const struct perf_evsel *evsel)
>  {
>  	return evsel->leader == evsel;

SNIP

>  {
>  	struct list_head *list = $3;
> +	struct parse_events_data__events *data = _data;
> +
> +	/* Count groups only have more than 1 members */
> +	if (!list_is_last(list->next, list))
> +		data->nr_groups++;
>  
>  	parse_events__set_leader($1, list);
>  	$$ = list;
> @@ -130,6 +135,11 @@ PE_NAME '{' events '}'
>  '{' events '}'
>  {
>  	struct list_head *list = $2;
> +	struct parse_events_data__events *data = _data;
> +
> +	/* Count groups only have more than 1 members */
> +	if (!list_is_last(list->next, list))
> +		data->nr_groups++;

nitpick.. maybe add a function for above 3 lines?

You could add static function right after ABORT_ON
macro definition.

thanks,
jirka
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