perf test: Add test of libpfm4 events

$ ./perf test -v 102
  102: perf all libpfm4 events test                                    :
  --- start ---
  test child forked, pid 3030994
  Testing ix86arch::UNHALTED_CORE_CYCLES
  Testing ix86arch::INSTRUCTION_RETIRED
  Testing ix86arch::UNHALTED_REFERENCE_CYCLES
  Testing ix86arch::LLC_REFERENCES
  Testing ix86arch::LLC_MISSES
  Testing ix86arch::BRANCH_INSTRUCTIONS_RETIRED
  Testing ix86arch::MISPREDICTED_BRANCH_RETIRED
  Testing perf_raw::r0000
  Testing icl::UNHALTED_CORE_CYCLES
  Testing icl::UNHALTED_REFERENCE_CYCLES
  ...
  test child finished with 0
  ---- end ----
  perf all libpfm4 events test: Ok

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20230608232400.3056312-4-namhyung@kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/shell/stat_all_pfm.sh

@@ -0,0 +1,51 @@
+#!/bin/sh
+# perf all libpfm4 events test
+# SPDX-License-Identifier: GPL-2.0
+
+if perf version --build-options | grep HAVE_LIBPFM | grep -q OFF
+then
+  echo "Skipping, no libpfm4 support"
+  exit 2
+fi
+
+err=0
+for p in $(perf list --raw-dump pfm)
+do
+  if echo "$p" | grep -q unc_
+  then
+    echo "Skipping uncore event '$p' that may require additional options."
+    continue
+  fi
+  echo "Testing $p"
+  result=$(perf stat --pfm-events "$p" true 2>&1)
+  x=$?
+  if echo "$result" | grep -q "failed to parse event $p : invalid or missing unit mask"
+  then
+    continue
+  fi
+  if test "$x" -ne "0"
+  then
+    echo "Unexpected exit code '$x'"
+    err=1
+  fi
+  if ! echo "$result" | grep -q "$p" && ! echo "$result" | grep -q "<not supported>"
+  then
+    # We failed to see the event and it is supported. Possibly the workload was
+    # too small so retry with something longer.
+    result=$(perf stat --pfm-events "$p" perf bench internals synthesize 2>&1)
+    x=$?
+    if test "$x" -ne "0"
+    then
+      echo "Unexpected exit code '$x'"
+      err=1
+    fi
+    if ! echo "$result" | grep -q "$p"
+    then
+      echo "Event '$p' not printed in:"
+      echo "$result"
+      err=1
+    fi
+  fi
+done
+
+exit "$err"