perf stat: Add 'needs_sort' argument to cpu_aggr_map__new()

In case of no aggregation, it needs to keep the original (cpu) ordering
in the aggr_map so that it can be in sync with the cpu map.  This will
make the code easier to handle AGGR_NONE similar to others.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20221018020227.85905-7-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-stat.c

@@ -1458,8 +1458,9 @@ static int perf_stat_init_aggr_mode(void)
 	aggr_cpu_id_get_t get_id = aggr_mode__get_aggr(stat_config.aggr_mode);
 
 	if (get_id) {
+		bool needs_sort = stat_config.aggr_mode != AGGR_NONE;
 		stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus,
-							 get_id, /*data=*/NULL);
+							 get_id, /*data=*/NULL, needs_sort);
 		if (!stat_config.aggr_map) {
 			pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]);
 			return -1;
@@ -1674,11 +1675,13 @@ static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
 {
 	struct perf_env *env = &st->session->header.env;
 	aggr_cpu_id_get_t get_id = aggr_mode__get_aggr_file(stat_config.aggr_mode);
+	bool needs_sort = stat_config.aggr_mode != AGGR_NONE;
 
 	if (!get_id)
 		return 0;
 
-	stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus, get_id, env);
+	stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus,
+						 get_id, env, needs_sort);
 	if (!stat_config.aggr_map) {
 		pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]);
 		return -1;

tools/perf/util/cpumap.c

@@ -234,7 +234,7 @@ static int aggr_cpu_id__cmp(const void *a_pointer, const void *b_pointer)
 
 struct cpu_aggr_map *cpu_aggr_map__new(const struct perf_cpu_map *cpus,
 				       aggr_cpu_id_get_t get_id,
-				       void *data)
+				       void *data, bool needs_sort)
 {
 	int idx;
 	struct perf_cpu cpu;
@@ -270,7 +270,9 @@ struct cpu_aggr_map *cpu_aggr_map__new(const struct perf_cpu_map *cpus,
 		if (trimmed_c)
 			c = trimmed_c;
 	}
+
 	/* ensure we process id in increasing order */
+	if (needs_sort)
 		qsort(c->map, c->nr, sizeof(struct aggr_cpu_id), aggr_cpu_id__cmp);
 
 	return c;

tools/perf/util/cpumap.h

@@ -97,7 +97,7 @@ typedef struct aggr_cpu_id (*aggr_cpu_id_get_t)(struct perf_cpu cpu, void *data)
  */
 struct cpu_aggr_map *cpu_aggr_map__new(const struct perf_cpu_map *cpus,
 				       aggr_cpu_id_get_t get_id,
-				       void *data);
+				       void *data, bool needs_sort);
 
 bool aggr_cpu_id__equal(const struct aggr_cpu_id *a, const struct aggr_cpu_id *b);
 bool aggr_cpu_id__is_empty(const struct aggr_cpu_id *a);