linux-kernel - [PATCH v6 7/7] perf test: Add a test for default perf stat command

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Message-Id: <20240903102005.78049-8-james.clark@linaro.org>
Date: Tue,  3 Sep 2024 11:19:51 +0100
From: James Clark <james.clark@...aro.org>
To: irogers@...gle.com,
	linux-perf-users@...r.kernel.org,
	kan.liang@...ux.intel.com,
	ak@...ux.intel.com,
	namhyung@...nel.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>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Weilin Wang <weilin.wang@...el.com>,
	Dominique Martinet <asmadeus@...ewreck.org>,
	Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
	Colin Ian King <colin.i.king@...il.com>,
	Yang Jihong <yangjihong@...edance.com>,
	Howard Chu <howardchu95@...il.com>,
	Ze Gao <zegao2021@...il.com>,
	Yunseong Kim <yskelg@...il.com>,
	Sun Haiyong <sunhaiyong@...ngson.cn>,
	Jing Zhang <renyu.zj@...ux.alibaba.com>,
	Yicong Yang <yangyicong@...ilicon.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v6 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.

The event line can either be output as "pmu/cycles/" or just "cycles" if
there is only one PMU. Include 2 spaces for padding in the one PMU case
to avoid matching when the word cycles is included in metric
descriptions.

Signed-off-by: James Clark <james.clark@...aro.org>
---
 tools/perf/tests/shell/stat.sh | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/tools/perf/tests/shell/stat.sh b/tools/perf/tests/shell/stat.sh
index 525d0c44fdc6..5a2ca2bcf94d 100755
--- a/tools/perf/tests/shell/stat.sh
+++ b/tools/perf/tests/shell/stat.sh
@@ -148,6 +148,30 @@ 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, assume minimum of 1
+  pmus=$(ls /sys/bus/event_source/devices/*/cpus 2>/dev/null | wc -l)
+  if [ "$pmus" -lt 1 ]
+  then
+    pmus=1
+  fi
+
+  # Run default Perf stat
+  cycles_events=$(perf stat -- true 2>&1 | grep -E "/cycles/|  cycles  " | wc -l)
+
+  if [ "$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 +179,5 @@ test_stat_repeat_weak_groups
 test_topdown_groups
 test_topdown_weak_groups
 test_cputype
+test_hybrid
 exit $err
-- 
2.34.1