linux-kernel - [PATCH 7/7] perf test: Add a test for default perf stat command

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Message-Id: <20240813132323.98728-8-james.clark@linaro.org>
Date: Tue, 13 Aug 2024 14:23:15 +0100
From: James Clark <james.clark@...aro.org>
To: irogers@...gle.com,
	linux-perf-users@...r.kernel.org
Cc: James Clark <james.clark@...aro.org>,
	John Garry <john.g.garry@...cle.com>,
	Will Deacon <will@...nel.org>,
	Mike Leach <mike.leach@...aro.org>,
	Leo Yan <leo.yan@...ux.dev>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	Yang Jihong <yangjihong1@...wei.com>,
	Dominique Martinet <asmadeus@...ewreck.org>,
	Ze Gao <zegao2021@...il.com>,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 7/7] perf test: Add a test for default perf stat command

Test that one cycles event is opened for each core PMU when "perf stat"
is run without arguments.

Signed-off-by: James Clark <james.clark@...aro.org>
---
 tools/perf/tests/shell/stat.sh | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/tools/perf/tests/shell/stat.sh b/tools/perf/tests/shell/stat.sh
index 525d0c44fdc6..7118cfc37f48 100755
--- a/tools/perf/tests/shell/stat.sh
+++ b/tools/perf/tests/shell/stat.sh
@@ -148,6 +148,26 @@ test_cputype() {
   echo "cputype test [Success]"
 }
 
+test_hybrid() {
+  # Test the default stat command on hybrid devices opens one cycles event for
+  # each CPU type.
+  echo "hybrid test"
+
+  # Count the number of core PMUs
+  pmus=$(ls /sys/bus/event_source/devices/*/cpus 2>/dev/null | wc -l)
+
+  # Run default Perf stat
+  cycles_events=$(perf stat -- true 2>&1 | grep "cycles" | wc -l)
+
+  if [ "$pmus" -ne "$cycles_events" ]
+  then
+    echo "hybrid test [Found $pmus PMUs but $cycles_events cycles events. Failed]"
+    err=1
+    return
+  fi
+  echo "hybrid test [Success]"
+}
+
 test_default_stat
 test_stat_record_report
 test_stat_record_script
@@ -155,4 +175,5 @@ test_stat_repeat_weak_groups
 test_topdown_groups
 test_topdown_weak_groups
 test_cputype
+test_hybrid
 exit $err
-- 
2.34.1