linux-kernel - [PATCH 2/2] perf test: Add cgroup sampling test

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Message-ID: <20240818212948.2873156-2-namhyung@kernel.org>
Date: Sun, 18 Aug 2024 14:29:48 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Kan Liang <kan.liang@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-perf-users@...r.kernel.org
Subject: [PATCH 2/2] perf test: Add cgroup sampling test

Add it to the record.sh shell test to verify if it tracks cgroup
information correctly.  It records with --all-cgroups option can check
if it has PERF_RECORD_CGROUP and the names are not "unknown".

  $ sudo ./perf test -vv 95
   95: perf record tests:
  --- start ---
  test child forked, pid 2871922
   169c90-169cd0 g test_loop
  perf does have symbol 'test_loop'
  Basic --per-thread mode test
  Basic --per-thread mode test [Success]
  Register capture test
  Register capture test [Success]
  Basic --system-wide mode test
  Basic --system-wide mode test [Success]
  Basic target workload test
  Basic target workload test [Success]
  Branch counter test
  branch counter feature not supported on all core PMUs (/sys/bus/event_source/devices/cpu) [Skipped]
  Cgroup sampling test
  Cgroup sampling test [Success]
  ---- end(0) ----
   95: perf record tests                                               : Ok

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/tests/shell/record.sh | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/tools/perf/tests/shell/record.sh b/tools/perf/tests/shell/record.sh
index 36883b03169f..048078ee2eca 100755
--- a/tools/perf/tests/shell/record.sh
+++ b/tools/perf/tests/shell/record.sh
@@ -206,6 +206,28 @@ test_branch_counter() {
   echo "Branch counter test [Success]"
 }
 
+test_cgroup() {
+  echo "Cgroup sampling test"
+  if ! perf record -aB --synth=cgroup --all-cgroups -o "${perfdata}" ${testprog} 2> /dev/null
+  then
+    echo "Cgroup sampling [Skipped not supported]"
+    return
+  fi
+  if ! perf report -i "${perfdata}" -D | grep -q "CGROUP"
+  then
+    echo "Cgroup sampling [Failed missing output]"
+    err=1
+    return
+  fi
+  if ! perf script -i "${perfdata}" -F cgroup | grep -q -v "unknown"
+  then
+    echo "Cgroup sampling [Failed cannot resolve cgroup names]"
+    err=1
+    return
+  fi
+  echo "Cgroup sampling test [Success]"
+}
+
 # raise the limit of file descriptors to minimum
 if [[ $default_fd_limit -lt $min_fd_limit ]]; then
        ulimit -Sn $min_fd_limit
@@ -216,6 +238,7 @@ test_register_capture
 test_system_wide
 test_workload
 test_branch_counter
+test_cgroup
 
 # restore the default value
 ulimit -Sn $default_fd_limit
-- 
2.46.0.184.g6999bdac58-goog