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

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Date:	Thu, 29 Nov 2012 23:58:54 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
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

2012-11-29 (목), 15:33 +0100, Jiri Olsa:
> 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;
> 

You mean adding 'evsel->nr_members > 1' to this function?  For some
reason, I'd like to treat non-group events as group leaders so I dropped
that check from the function.


> 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.

No problem.  Will do.

Thanks,
Namhyung


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