linux-kernel - [PATCH 6/7] perf test: Make stat test work on DT devices

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Message-Id: <20240813132323.98728-7-james.clark@linaro.org>
Date: Tue, 13 Aug 2024 14:23:14 +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 6/7] perf test: Make stat test work on DT devices

PMUs aren't listed in /sys/devices/ on DT devices, so change the search
directory to /sys/bus/event_source/devices which works everywhere. Also
add armv8_cortex_* as a known PMU type to search for to make the test
run on more devices.

Signed-off-by: James Clark <james.clark@...aro.org>
---
 tools/perf/tests/shell/stat.sh | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/tools/perf/tests/shell/stat.sh b/tools/perf/tests/shell/stat.sh
index 3f1e67795490..525d0c44fdc6 100755
--- a/tools/perf/tests/shell/stat.sh
+++ b/tools/perf/tests/shell/stat.sh
@@ -117,16 +117,18 @@ test_cputype() {
 
   # Find a known PMU for cputype.
   pmu=""
-  for i in cpu cpu_atom armv8_pmuv3_0
+  devs="/sys/bus/event_source/devices"
+  for i in $devs/cpu $devs/cpu_atom $devs/armv8_pmuv3_0 $devs/armv8_cortex_*
   do
-    if test -d "/sys/devices/$i"
+    i_base=$(basename "$i")
+    if test -d "$i"
     then
-      pmu="$i"
+      pmu="$i_base"
       break
     fi
-    if perf stat -e "$i/instructions/" true > /dev/null 2>&1
+    if perf stat -e "$i_base/instructions/" true > /dev/null 2>&1
     then
-      pmu="$i"
+      pmu="$i_base"
       break
     fi
   done
-- 
2.34.1