linux-kernel - [PATCH v2 3/6] perf report: Show event sample counts in --stat output

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Date:   Mon, 26 Apr 2021 18:37:14 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH v2 3/6] perf report: Show event sample counts in --stat output

To make the output identical with perf report -D, it needs to show
per-event sample counts along with the aggregated stat  at the end.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/builtin-report.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index b0b9b60f74e5..be56f3efa413 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -708,9 +708,22 @@ static void report__output_resort(struct report *rep)
 	ui_progress__finish();
 }
 
+static int count_sample_event(struct perf_tool *tool __maybe_unused,
+			      union perf_event *event __maybe_unused,
+			      struct perf_sample *sample __maybe_unused,
+			      struct evsel *evsel,
+			      struct machine *machine __maybe_unused)
+{
+	struct hists *hists = evsel__hists(evsel);
+
+	hists__inc_nr_events(hists);
+	return 0;
+}
+
 static void stats_setup(struct report *rep)
 {
 	memset(&rep->tool, 0, sizeof(rep->tool));
+	rep->tool.sample = count_sample_event;
 	rep->tool.no_warn = true;
 }
 
@@ -719,6 +732,7 @@ static int stats_print(struct report *rep)
 	struct perf_session *session = rep->session;
 
 	perf_session__fprintf_nr_events(session, stdout);
+	perf_evlist__fprintf_nr_events(session->evlist, stdout);
 	return 0;
 }
 
-- 
2.31.1.527.g47e6f16901-goog