linux-kernel - [RFC PATCH v18 8/8] perf test: Add test for Intel TPEBS counting mode

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Message-ID: <20240720062102.444578-9-weilin.wang@intel.com>
Date: Sat, 20 Jul 2024 02:21:01 -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 v18 8/8] perf test: Add test for Intel TPEBS counting mode

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

Intel TPEBS sampling mode is supported through perf record. The counting mode
code uses perf record to capture retire_latency value and use it in metric
calculation. This test checks the counting mode code on Intel platforms.

Signed-off-by: Weilin Wang <weilin.wang@...el.com>
---
 .../perf/tests/shell/test_stat_intel_tpebs.sh | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100755 tools/perf/tests/shell/test_stat_intel_tpebs.sh

diff --git a/tools/perf/tests/shell/test_stat_intel_tpebs.sh b/tools/perf/tests/shell/test_stat_intel_tpebs.sh
new file mode 100755
index 000000000000..c60b29add980
--- /dev/null
+++ b/tools/perf/tests/shell/test_stat_intel_tpebs.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+# test Intel TPEBS counting mode
+# SPDX-License-Identifier: GPL-2.0
+
+set -e
+grep -q GenuineIntel /proc/cpuinfo || { echo Skipping non-Intel; exit 2; }
+
+# Use this event for testing because it should exist in all platforms
+event=cache-misses:R
+
+# Without this cmd option, default value or zero is returned
+echo "Testing without --record-tpebs"
+result=$(perf stat -e "$event" true 2>&1)
+[[ "$result" =~ $event ]] || exit 1
+
+# In platforms that do not support TPEBS, it should execute without error.
+echo "Testing with --record-tpebs"
+result=$(perf stat -e "$event" --record-tpebs -a sleep 0.01 2>&1)
+[[ "$result" =~ "perf record" && "$result" =~ $event ]] || exit 1
-- 
2.43.0