linux-kernel - [RFC PATCH v7 5/6] perf stat: Add retire latency print functions to print out at the very end of print out

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Message-ID: <20240402214436.1409476-6-weilin.wang@intel.com>
Date: Tue,  2 Apr 2024 17:44:35 -0400
From: weilin.wang@...el.com
To: weilin.wang@...el.com,
	Namhyung Kim <namhyung@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Kan Liang <kan.liang@...ux.intel.com>
Cc: linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Perry Taylor <perry.taylor@...el.com>,
	Samantha Alt <samantha.alt@...el.com>,
	Caleb Biggers <caleb.biggers@...el.com>
Subject: [RFC PATCH v7 5/6] perf stat: Add retire latency print functions to print out at the very end of print out

From: Weilin Wang <weilin.wang@...el.com>

Add print out functions so that users could read retire latency values.

Example output:

 Performance counter stats for 'system wide':

            25,717      MEM_INST_RETIRED.SPLIT_STORES    #      2.2 %  tma_split_stores
        28,365,080      CPU_CLK_UNHALTED.THREAD
             24.00      MEM_INST_RETIRED.SPLIT_STORES:p  #       96        4

       2.054365083 seconds time elapsed

This output of retire latency data is in format:
 <val> <event-name> # <sum> <count>.

Signed-off-by: Weilin Wang <weilin.wang@...el.com>
Reviewed-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/stat-display.c | 69 ++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)

diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
index bfc1d705f437..c32d484b53a9 100644
--- a/tools/perf/util/stat-display.c
+++ b/tools/perf/util/stat-display.c
@@ -21,6 +21,7 @@
 #include "iostat.h"
 #include "pmu.h"
 #include "pmus.h"
+#include "metricgroup.h"
 
 #define CNTR_NOT_SUPPORTED	"<not supported>"
 #define CNTR_NOT_COUNTED	"<not counted>"
@@ -34,6 +35,7 @@
 #define COMM_LEN     16
 #define PID_LEN       7
 #define CPUS_LEN      4
+#define RETIRE_LEN    8
 
 static int aggr_header_lens[] = {
 	[AGGR_CORE] 	= 18,
@@ -426,6 +428,71 @@ static void print_metric_std(struct perf_stat_config *config,
 	fprintf(out, " %-*s", METRIC_LEN - n - 1, unit);
 }
 
+static void print_retire_lat_std(struct perf_stat_config *config,
+				 struct outstate *os)
+{
+	FILE *out = os->fh;
+	bool newline = os->newline;
+	struct tpebs_retire_lat *t;
+	struct list_head *retire_lats = &config->tpebs_results;
+
+	list_for_each_entry(t, retire_lats, event.nd) {
+		if (newline)
+			do_new_line_std(config, os);
+		fprintf(out, "%'*.2f ", COUNTS_LEN, t->val);
+		/* For print alignment */
+		fprintf(out, "%-*s ", config->unit_width, "");
+		fprintf(out, "%-*s", EVNAME_LEN, t->event.name);
+		fprintf(out, " # ");
+		fprintf(out, "%*d %*ld\n", RETIRE_LEN, t->sum,
+			 RETIRE_LEN, t->count);
+	}
+}
+
+static void print_retire_lat_csv(struct perf_stat_config *config,
+				 struct outstate *os)
+{
+	FILE *out = os->fh;
+	struct tpebs_retire_lat *t;
+	struct list_head *retire_lats = &config->tpebs_results;
+	const char *sep = config->csv_sep;
+
+	list_for_each_entry(t, retire_lats, event.nd) {
+		fprintf(out, "%f%s%s%s%s%ld%s%d\n", t->val, sep, sep, t->event.name, sep,
+			t->count, sep, t->sum);
+	}
+}
+
+static void print_retire_lat_json(struct perf_stat_config *config,
+				  struct outstate *os)
+{
+	FILE *out = os->fh;
+	struct tpebs_retire_lat *t;
+	struct list_head *retire_lats = &config->tpebs_results;
+
+	fprintf(out, "{");
+	list_for_each_entry(t, retire_lats, event.nd) {
+		fprintf(out, "\"retire_latency-value\" : \"%f\", ", t->val);
+		fprintf(out, "\"event-name\" : \"%s\"", t->event.name);
+		fprintf(out, "\"sample-counts\" : \"%ld\"", t->count);
+		fprintf(out, "\"retire_latency-sum\" : \"%d\"", t->sum);
+	}
+	fprintf(out, "}");
+}
+
+static void print_retire_lat(struct perf_stat_config *config,
+			     struct outstate *os)
+{
+	if (!&config->tpebs_results)
+		return;
+	if (config->json_output)
+		print_retire_lat_json(config, os);
+	else if (config->csv_output)
+		print_retire_lat_csv(config, os);
+	else
+		print_retire_lat_std(config, os);
+}
+
 static void new_line_csv(struct perf_stat_config *config, void *ctx)
 {
 	struct outstate *os = ctx;
@@ -1609,6 +1676,8 @@ void evlist__print_counters(struct evlist *evlist, struct perf_stat_config *conf
 		break;
 	}
 
+	print_retire_lat(config, &os);
+
 	print_footer(config);
 
 	fflush(config->output);
-- 
2.43.0