linux-kernel - [PATCH 1/2] perf stat: Use field separator in the metric header

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Date: Thu, 27 Jun 2024 13:03:52 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Kan Liang <kan.liang@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-perf-users@...r.kernel.org
Subject: [PATCH 1/2] perf stat: Use field separator in the metric header

It didn't use the passed field separator (using -x option) when it
prints the metric headers and always put "," between the fields.

Before:
  $ sudo ./perf stat -a -x : --per-core -M tma_core_bound --metric-only true
  core,cpus,%  tma_core_bound:     <<<--- here: "core,cpus," but ":" expected
  S0-D0-C0:2:10.5:
  S0-D0-C1:2:14.8:
  S0-D0-C2:2:9.9:
  S0-D0-C3:2:13.2:

After:
  $ sudo ./perf stat -a -x : --per-core -M tma_core_bound --metric-only true
  core:cpus:%  tma_core_bound:
  S0-D0-C0:2:10.5:
  S0-D0-C1:2:15.0:
  S0-D0-C2:2:16.5:
  S0-D0-C3:2:12.5:

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/stat-display.c | 37 ++++++++++++++++++++++++++--------
 1 file changed, 29 insertions(+), 8 deletions(-)

diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
index 91d2f7f65df7..e8673c9f6b49 100644
--- a/tools/perf/util/stat-display.c
+++ b/tools/perf/util/stat-display.c
@@ -47,16 +47,27 @@ static int aggr_header_lens[] = {
 };
 
 static const char *aggr_header_csv[] = {
-	[AGGR_CORE] 	= 	"core,cpus,",
-	[AGGR_CACHE]	= 	"cache,cpus,",
-	[AGGR_DIE] 	= 	"die,cpus,",
-	[AGGR_SOCKET] 	= 	"socket,cpus,",
-	[AGGR_NONE] 	= 	"cpu,",
-	[AGGR_THREAD] 	= 	"comm-pid,",
-	[AGGR_NODE] 	= 	"node,",
+	[AGGR_CORE] 	= 	"core%scpus%s",
+	[AGGR_CACHE]	= 	"cache%scpus%s",
+	[AGGR_DIE] 	= 	"die%scpus%s",
+	[AGGR_SOCKET] 	= 	"socket%scpus%s",
+	[AGGR_NONE] 	= 	"cpu%s",
+	[AGGR_THREAD] 	= 	"comm-pid%s",
+	[AGGR_NODE] 	= 	"node%s",
 	[AGGR_GLOBAL] 	=	""
 };
 
+static int aggr_header_num[] = {
+	[AGGR_CORE] 	= 	2,
+	[AGGR_CACHE]	= 	2,
+	[AGGR_DIE] 	= 	2,
+	[AGGR_SOCKET] 	= 	2,
+	[AGGR_NONE] 	= 	1,
+	[AGGR_THREAD] 	= 	1,
+	[AGGR_NODE] 	= 	1,
+	[AGGR_GLOBAL] 	=	0,
+};
+
 static const char *aggr_header_std[] = {
 	[AGGR_CORE] 	= 	"core",
 	[AGGR_CACHE] 	= 	"cache",
@@ -1185,8 +1196,18 @@ static void print_metric_headers_csv(struct perf_stat_config *config,
 {
 	if (config->interval)
 		fputs("time,", config->output);
-	if (!config->iostat_run)
+	if (config->iostat_run)
+		return;
+
+	if (aggr_header_num[config->aggr_mode] == 1) {
+		fprintf(config->output, aggr_header_csv[config->aggr_mode],
+			config->csv_sep);
+	} else if (aggr_header_num[config->aggr_mode] == 2) {
+		fprintf(config->output, aggr_header_csv[config->aggr_mode],
+			config->csv_sep, config->csv_sep);
+	} else {
 		fputs(aggr_header_csv[config->aggr_mode], config->output);
+	}
 }
 
 static void print_metric_headers_json(struct perf_stat_config *config __maybe_unused,
-- 
2.45.2.803.g4e1b14247a-goog