perf stat: Correct first_shadow_cpu to return index

perf_stat__update_shadow_stats() and perf_stat__print_shadow_stats() use
a cpu map index rather than a CPU, but first_shadow_cpu is returning the
wrong value for this. Change first_shadow_cpu to
first_shadow_cpu_map_idx to make things agree.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Vineet Singh <vineet.singh@intel.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: zhengjun.xing@intel.com
Link: https://lore.kernel.org/r/20220105061351.120843-48-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/stat-display.c

@@ -327,24 +327,23 @@ static void print_metric_header(struct perf_stat_config *config,
 		fprintf(os->fh, "%*s ", config->metric_only_len, unit);
 }
 
-static int first_shadow_cpu(struct perf_stat_config *config,
-			    struct evsel *evsel, const struct aggr_cpu_id *id)
+static int first_shadow_cpu_map_idx(struct perf_stat_config *config,
+				struct evsel *evsel, const struct aggr_cpu_id *id)
 {
-	struct perf_cpu_map *cpus;
+	struct perf_cpu_map *cpus = evsel__cpus(evsel);
 	int cpu, idx;
 
 	if (config->aggr_mode == AGGR_NONE)
-		return id->cpu;
+		return perf_cpu_map__idx(cpus, id->cpu);
 
 	if (!config->aggr_get_id)
 		return 0;
 
-	cpus = evsel__cpus(evsel);
 	perf_cpu_map__for_each_cpu(cpu, idx, cpus) {
 		struct aggr_cpu_id cpu_id = config->aggr_get_id(config, cpu);
 
 		if (aggr_cpu_id__equal(&cpu_id, id))
-			return cpu;
+			return idx;
 	}
 	return 0;
 }
@@ -503,7 +502,7 @@ static void printout(struct perf_stat_config *config, struct aggr_cpu_id id, int
 	}
 
 	perf_stat__print_shadow_stats(config, counter, uval,
-				first_shadow_cpu(config, counter, &id),
+				first_shadow_cpu_map_idx(config, counter, &id),
 				&out, &config->metric_events, st);
 	if (!config->csv_output && !config->metric_only) {
 		print_noise(config, counter, noise);
@@ -532,7 +531,7 @@ static void aggr_update_shadow(struct perf_stat_config *config,
 				val += perf_counts(counter->counts, idx, 0)->val;
 			}
 			perf_stat__update_shadow_stats(counter, val,
-					first_shadow_cpu(config, counter, &id),
+					first_shadow_cpu_map_idx(config, counter, &id),
 					&rt_stat);
 		}
 	}