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

Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240818212948.2873156-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/tests/shell/record.sh b/tools/perf/tests/shell/record.sh
index 36883b0..048078e 100755 (executable)
--- 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