perf test: Workload test of metric and metricgroups

Test every metric and metricgroup with 'true' as a workload. For
metrics, check that we see the metric printed or get unsupported. If the
'true' workload executes too quickly retry with 'perf bench internals
synthesize'.

v3. Fix test condition (thanks to Paul A. Clarke <pc@us.ibm.com>). Add a
    fallback case of a larger workload so that we don't ignore "<not
    counted>".
v2. Switched the workload to something faster.
Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20210917184240.2181186-1-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/shell/stat_all_metricgroups.sh

+#!/bin/sh
+# perf all metricgroups test
+# SPDX-License-Identifier: GPL-2.0
+
+set -e
+
+for m in $(perf list --raw-dump metricgroups); do
+  echo "Testing $m"
+  perf stat -M "$m" true
+done
+
+exit 0

tools/perf/tests/shell/stat_all_metrics.sh

+#!/bin/sh
+# perf all metrics test
+# SPDX-License-Identifier: GPL-2.0
+
+set -e
+
+for m in $(perf list --raw-dump metrics); do
+  echo "Testing $m"
+  result=$(perf stat -M "$m" true 2>&1)
+  if [[ ! "$result" =~ "$m" ]] && [[ ! "$result" =~ "<not supported>" ]]; then
+    # We failed to see the metric and the events are support. Possibly the
+    # workload was too small so retry with something longer.
+    result=$(perf stat -M "$m" perf bench internals synthesize 2>&1)
+    if [[ ! "$result" =~ "$m" ]]; then
+      echo "Metric '$m' not printed in:"
+      echo "$result"
+      exit 1
+    fi
+  fi
+done
+
+exit 0