linux-kernel - [PATCH 06/19] perf stat: Add 'needs_sort' argument to cpu_aggr_map_

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Date:   Sun,  9 Oct 2022 22:35:47 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org,
        Kan Liang <kan.liang@...ux.intel.com>,
        Leo Yan <leo.yan@...aro.org>, Andi Kleen <ak@...ux.intel.com>,
        Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
        James Clark <james.clark@....com>,
        Xing Zhengjun <zhengjun.xing@...ux.intel.com>
Subject: [PATCH 06/19] 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@...nel.org>
---
 tools/perf/builtin-stat.c | 7 +++++--
 tools/perf/util/cpumap.c  | 6 ++++--
 tools/perf/util/cpumap.h  | 2 +-
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index b00ef20aef5b..e5ddf60ab31d 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1461,8 +1461,9 @@ 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;
@@ -1677,11 +1678,13 @@ 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;
diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
index 60209fe87456..6e3fcf523de9 100644
--- a/tools/perf/util/cpumap.c
+++ b/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;
@@ -270,8 +270,10 @@ 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 */
-	qsort(c->map, c->nr, sizeof(struct aggr_cpu_id), aggr_cpu_id__cmp);
+	if (needs_sort)
+		qsort(c->map, c->nr, sizeof(struct aggr_cpu_id), aggr_cpu_id__cmp);
 
 	return c;
 
diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h
index b2ff648bc417..da28b3146ef9 100644
--- a/tools/perf/util/cpumap.h
+++ b/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);
-- 
2.38.0.rc1.362.ged0d419d3c-goog