[PATCH 1/2] tools/perf/tests: perf all metrics test fails when perf_event access is restricted

[Athira Rajeev]

Perf all metrics test fails as below when perf_event access
is restricted.

    ./perf test -v "perf all metrics test"
    Metric 'Memory_RD_BW_Chip' not printed in:
    Error:
    Access to performance monitoring and observability operations is limited.
    Enforced MAC policy settings (SELinux) can limit access to performance
    —
    access to performance monitoring and observability operations for processes
    without CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN Linux capability.
    —
    test child finished with -1
    ---- end ----
    perf all metrics test: FAILED!

The perf all metrics test picks the input events from
"perf list --raw-dump metrics" and runs "perf stat -M "$m""
for each of the metrics in the list. It fails here for some
of the metrics which needs access, since it collects system
wide resource details/statistics. Fix the testcase to skip
those metric events.

Signed-off-by: Athira Rajeev <atrajeev at linux.vnet.ibm.com>
---
 tools/perf/tests/shell/stat_all_metrics.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/shell/stat_all_metrics.sh b/tools/perf/tests/shell/stat_all_metrics.sh
index 54774525e18a..14b96484a359 100755
--- a/tools/perf/tests/shell/stat_all_metrics.sh
+++ b/tools/perf/tests/shell/stat_all_metrics.sh
@@ -6,7 +6,9 @@ err=0
 for m in $(perf list --raw-dump metrics); do
   echo "Testing $m"
   result=$(perf stat -M "$m" true 2>&1)
-  if [[ "$result" =~ ${m:0:50} ]] || [[ "$result" =~ "<not supported>" ]]
+  # Skip if there is no access to perf_events monitoring
+  # and observability operations
+  if [[ "$result" =~ ${m:0:50} ]] || [[ "$result" =~ "<not supported>" ]] || [[ "$result" =~ "Access to performance monitoring and observability operations is limited" ]]
   then
     continue
   fi
-- 
2.31.1