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.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Yang Jihong <yangjihong@bytedance.com>
Cc: Dominique Martinet <asmadeus@codewreck.org>
Cc: Colin Ian King <colin.i.king@gmail.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ze Gao <zegao2021@gmail.com>
Cc: Yicong Yang <yangyicong@hisilicon.com>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Yang Li <yang.lee@linux.alibaba.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: ak@linux.intel.com
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Sun Haiyong <sunhaiyong@loongson.cn>
Cc: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20240926144851.245903-8-james.clark@linaro.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

diff --git a/tools/perf/tests/shell/stat.sh b/tools/perf/tests/shell/stat.sh
index 525d0c44fdc63ac0e20bc17e4719021fc55947d9..5a2ca2bcf94d136bb9d8ca2b7c352a0b0ba54b14 100755 (executable)
--- 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