On Thu, Oct 13, 2016 at 02:15:29PM -0700, Andi Kleen wrote: SNIP
> -------- > > diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c > index 688dea7cb08f..76304f27c090 100644 > --- a/tools/perf/builtin-stat.c > +++ b/tools/perf/builtin-stat.c > @@ -140,6 +140,7 @@ static unsigned int unit_width > = 4; /* strlen("unit") */ > static bool forever = false; > static bool metric_only = false; > static bool force_metric_only = false; > +static bool no_merge = false; > static struct timespec ref_time; > static struct cpu_map *aggr_map; > static aggr_get_id_t aggr_get_id; > @@ -1178,11 +1179,59 @@ static void aggr_update_shadow(void) > } > } > > +static void collect_aliases(struct perf_evsel *counter, > + void (*cb)(struct perf_evsel *counter, void *data, > + bool first), > + void *data) merges_stats might be better name > +{ > + struct perf_evsel *alias; > + > + alias = list_prepare_entry(counter, &(evsel_list->entries), node); > + cb(counter, data, true); > + if (no_merge) > + return; please put this decision (no_merge) outside this function, so the normal path is straight this leads to my next question: why this merging should be default? it seems to make sense just for uncore events thanks, jirka