perf test: Add cputype testing to perf stat

Check a bogus PMU fails and that a known PMU succeeds. Limit to PMUs
known cpu, cpu_atom and armv8_pmuv3_0 ones.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ahmad Yasin <ahmad.yasin@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Edward Baker <edward.baker@intel.com>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kang Minchul <tegongkang@gmail.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Samantha Alt <samantha.alt@intel.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Tiezhu Yang <yangtiezhu@loongson.cn>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Link: https://lore.kernel.org/r/20230513063447.464691-1-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/shell/stat.sh

@@ -103,10 +103,54 @@ test_topdown_weak_groups() {
   echo "Topdown weak groups test [Success]"
 }
 
+test_cputype() {
+  # Test --cputype argument.
+  echo "cputype test"
+
+  # Bogus PMU should fail.
+  if perf stat --cputype="123" -e instructions true > /dev/null 2>&1
+  then
+    echo "cputype test [Bogus PMU didn't fail]"
+    err=1
+    return
+  fi
+
+  # Find a known PMU for cputype.
+  pmu=""
+  for i in cpu cpu_atom armv8_pmuv3_0
+  do
+    if test -d "/sys/devices/$i"
+    then
+      pmu="$i"
+      break
+    fi
+    if perf stat -e "$i/instructions/" true > /dev/null 2>&1
+    then
+      pmu="$i"
+      break
+    fi
+  done
+  if test "x$pmu" = "x"
+  then
+    echo "cputype test [Skipped known PMU not found]"
+    return
+  fi
+
+  # Test running with cputype produces output.
+  if ! perf stat --cputype="$pmu" -e instructions true 2>&1 | grep -E -q "instructions"
+  then
+    echo "cputype test [Failed count missed with given filter]"
+    err=1
+    return
+  fi
+  echo "cputype test [Success]"
+}
+
 test_default_stat
 test_stat_record_report
 test_stat_record_script
 test_stat_repeat_weak_groups
 test_topdown_groups
 test_topdown_weak_groups
+test_cputype
 exit $err