RE: [RFC PATCH 09/25] perf stat: Add helper functions for hardware-grouping method

[Wang, Weilin]

> -----Original Message-----
> From: Yang Jihong <yangjihong1@xxxxxxxxxx>
> Sent: Monday, September 25, 2023 8:37 PM
> To: Wang, Weilin <weilin.wang@xxxxxxxxx>; Ian Rogers
> <irogers@xxxxxxxxxx>; Peter Zijlstra <peterz@xxxxxxxxxxxxx>; Ingo Molnar
> <mingo@xxxxxxxxxx>; Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>;
> Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>; Jiri Olsa
> <jolsa@xxxxxxxxxx>; Namhyung Kim <namhyung@xxxxxxxxxx>; Hunter, Adrian
> <adrian.hunter@xxxxxxxxx>; Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
> Cc: linux-perf-users@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; Taylor,
> Perry <perry.taylor@xxxxxxxxx>; Alt, Samantha <samantha.alt@xxxxxxxxx>;
> Biggers, Caleb <caleb.biggers@xxxxxxxxx>; Mark Rutland
> <mark.rutland@xxxxxxx>
> Subject: Re: [RFC PATCH 09/25] perf stat: Add helper functions for hardware-
> grouping method
> 
> Hello,
> 
> On 2023/9/25 14:18, weilin.wang@xxxxxxxxx wrote:
> > From: Weilin Wang <weilin.wang@xxxxxxxxx>
> >
> > Add functions to free pmu_info_list and event_info_list before exit
> > grouping
> >
> > Signed-off-by: Weilin Wang <weilin.wang@xxxxxxxxx>
> > ---
> >   tools/perf/util/metricgroup.c | 32 ++++++++++++++++++++++++++++----
> >   1 file changed, 28 insertions(+), 4 deletions(-)
> >
> > diff --git a/tools/perf/util/metricgroup.c
> > b/tools/perf/util/metricgroup.c index feb5dab26..0ca885a42 100644
> > --- a/tools/perf/util/metricgroup.c
> > +++ b/tools/perf/util/metricgroup.c
> > @@ -1507,6 +1507,27 @@ static int parse_counter(const char *counter,
> >   	return 0;
> >   }
> >
> > +static void metricgroup__free_event_info(struct list_head
> > +					*event_info_list)
> > +{
> > +	struct metricgroup__event_info *e, *tmp;
> > +
> > +	list_for_each_entry_safe(e, tmp, event_info_list, nd) {
> > +		list_del_init(&e->nd);
> > +		free(e);
> > +	}
> > +}
> > +
> > +static void metricgroup__free_pmu_info(struct list_head
> > +*pmu_info_list) {
> > +	struct metricgroup__pmu_counters *p, *tmp;
> > +
> > +	list_for_each_entry_safe(p, tmp, pmu_info_list, nd) {
> > +		list_del_init(&p->nd);
> > +		free(p);
> > +	}
> > +}
> > +
> >   static struct metricgroup__event_info *event_info__new(const char *name,
> >   						      const char *pmu_name,
> >   						      const char *counter,
> > @@ -1524,7 +1545,8 @@ static struct metricgroup__event_info
> *event_info__new(const char *name,
> >   	}
> >   	e->name = name;
> >   	e->free_counter = free_counter;
> > -	e->pmu_name = strdup(pmu_name);
> > +	//e->pmu_name = strdup(pmu_name);
> Can the commented-out code be deleted?
> 
> > +	e->pmu_name = pmu_name;
> >   	if (free_counter) {
> >   		ret = set_counter_bitmap(0, e->counters);
> >   		if (ret)
> > @@ -1687,13 +1709,15 @@ static int hw_aware_build_grouping(struct
> > expr_parse_ctx *ctx __maybe_unused,
> >
> >   		ret = get_metricgroup_events(id, etable, &event_info_list);
> >   		if (ret)
> > -			return ret;
> > +			goto err_out;
> >   	}
> >   	ret = get_pmu_counter_layouts(&pmu_info_list, ltable);
> >   	if (ret)
> > -		return ret;
> > -
> > +		goto err_out;
> There seems to be no need for "goto err_out" here.

Hi, Yang. Thanks for being interested! I will update the code based on all the comments I received so far. 
Please also let me know if you have any suggestions or comments on the grouping method. 

Thanks,
Weilin

> 
> >
> > +err_out:
> > +	metricgroup__free_event_info(&event_info_list);
> > +	metricgroup__free_pmu_info(&pmu_info_list);
> >   	return ret;
> >   #undef RETURN_IF_NON_ZERO
> >   }
> >
> 
> 
> Thanks,
> Yang