linux-kernel - Re: [RFC 3/3] perf pmu: Restore auto-merging of PMU events created by prefix match

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Date:   Wed, 28 Feb 2018 09:45:24 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Agustin Vega-Frias <agustinv@...eaurora.org>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>, timur@...eaurora.org
Subject: Re: [RFC 3/3] perf pmu: Restore auto-merging of PMU events created
 by prefix match

Em Wed, Feb 28, 2018 at 10:40:38AM +0100, Jiri Olsa escreveu:
> On Tue, Feb 27, 2018 at 05:34:08PM -0500, Agustin Vega-Frias wrote:
> > This was disabled when auto-merging of non-alias events was disabled in
> > commit 63ce844 (perf stat: Only auto-merge events that are PMU aliases).
> 
> this changes the output, right? please provide before/after output

Yes, please show how it was and how it became, also please update the
documentation, as pointed out by Andi.

- Arnaldo
 
> thanks,
> jirka
> 
> > 
> > Signed-off-by: Agustin Vega-Frias <agustinv@...eaurora.org>
> > ---
> >  tools/perf/util/parse-events.c | 13 +++----------
> >  tools/perf/util/parse-events.h |  2 +-
> >  tools/perf/util/parse-events.y |  4 ++--
> >  3 files changed, 6 insertions(+), 13 deletions(-)
> > 
> > diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
> > index bafc91e..4e80ca3 100644
> > --- a/tools/perf/util/parse-events.c
> > +++ b/tools/perf/util/parse-events.c
> > @@ -1217,7 +1217,7 @@ int parse_events_add_numeric(struct parse_events_state *parse_state,
> >  			 get_config_name(head_config), &config_terms);
> >  }
> > 
> > -static int __parse_events_add_pmu(struct parse_events_state *parse_state,
> > +int parse_events_add_pmu(struct parse_events_state *parse_state,
> >  			 struct list_head *list, char *name,
> >  			 struct list_head *head_config, bool auto_merge_stats)
> >  {
> > @@ -1287,13 +1287,6 @@ static int __parse_events_add_pmu(struct parse_events_state *parse_state,
> >  	return evsel ? 0 : -ENOMEM;
> >  }
> > 
> > -int parse_events_add_pmu(struct parse_events_state *parse_state,
> > -			 struct list_head *list, char *name,
> > -			 struct list_head *head_config)
> > -{
> > -	return __parse_events_add_pmu(parse_state, list, name, head_config, false);
> > -}
> > -
> >  int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
> >  			       char *str, struct list_head **listp)
> >  {
> > @@ -1323,8 +1316,8 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
> >  					return -1;
> >  				list_add_tail(&term->list, head);
> > 
> > -				if (!__parse_events_add_pmu(parse_state, list,
> > -							    pmu->name, head, true)) {
> > +				if (!parse_events_add_pmu(parse_state, list,
> > +							  pmu->name, head, true)) {
> >  					pr_debug("%s -> %s/%s/\n", str,
> >  						 pmu->name, alias->str);
> >  					ok++;
> > diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
> > index 88108cd..5015cfd 100644
> > --- a/tools/perf/util/parse-events.h
> > +++ b/tools/perf/util/parse-events.h
> > @@ -167,7 +167,7 @@ int parse_events_add_breakpoint(struct list_head *list, int *idx,
> >  				void *ptr, char *type, u64 len);
> >  int parse_events_add_pmu(struct parse_events_state *parse_state,
> >  			 struct list_head *list, char *name,
> > -			 struct list_head *head_config);
> > +			 struct list_head *head_config, bool auto_merge_stats);
> > 
> >  int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
> >  			       char *str,
> > diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
> > index c528469..b51278f 100644
> > --- a/tools/perf/util/parse-events.y
> > +++ b/tools/perf/util/parse-events.y
> > @@ -232,7 +232,7 @@ PE_NAME opt_event_config
> >  		YYABORT;
> > 
> >  	ALLOC_LIST(list);
> > -	if (parse_events_add_pmu(_parse_state, list, $1, $2)) {
> > +	if (parse_events_add_pmu(_parse_state, list, $1, $2, false)) {
> >  		struct perf_pmu *pmu = NULL;
> >  		int ok = 0;
> > 
> > @@ -245,7 +245,7 @@ PE_NAME opt_event_config
> >  			if (!strncmp($1, name, strlen($1)) || !fnmatch($1, name, 0)) {
> >  				if (parse_events_copy_term_list(orig_terms, &terms))
> >  					YYABORT;
> > -				if (!parse_events_add_pmu(_parse_state, list, pmu->name, terms))
> > +				if (!parse_events_add_pmu(_parse_state, list, pmu->name, terms, true))
> >  					ok++;
> >  				parse_events_terms__delete(terms);
> >  			}
> > --
> > 2.7.4
> >