[PATCH] tools/perf/tests: Add system wide check for perf bench workload in all metric test

[Kajol Jain]

Testcase stat_all_metrics.sh fails in powerpc:
    
92: perf all metrics test : FAILED!

Logs with verbose:

[command]# ./perf test 92 -vv
 92: perf all metrics test                                           :
--- start ---
test child forked, pid 13262
Testing BRU_STALL_CPI
Testing COMPLETION_STALL_CPI
----
Testing TOTAL_LOCAL_NODE_PUMPS_P23
Metric 'TOTAL_LOCAL_NODE_PUMPS_P23' not printed in:
Error:
Invalid event (hv_24x7/PM_PB_LNS_PUMP23,chip=3/) in per-thread mode, enable system wide with '-a'.
Testing TOTAL_LOCAL_NODE_PUMPS_RETRIES_P01
Metric 'TOTAL_LOCAL_NODE_PUMPS_RETRIES_P01' not printed in:
Error:
Invalid event (hv_24x7/PM_PB_RTY_LNS_PUMP01,chip=3/) in per-thread mode, enable system wide with '-a'.
----

Based on above logs, we could see some of the hv-24x7 metric events fails,
and logs suggest to run the metric event with -a option.
This change happened after the commit a4b8cfcabb1d ("perf stat: Delay metric
parsing"), which delayed the metric parsing phase and now before metric parsing
phase perf tool identifies, whether target is system-wide or not. With this
change, perf_event_open will fails with workload monitoring for uncore events
as expected.

The perf all metric test case fails as some of the hv-24x7 metric events
may need bigger workload to get the data. And the added perf bench
workload in 'perf all metric test case' will not run for hv-24x7 without 
-a option.

Fix this issue by adding system wide check for perf bench workload.

Result with the patch changes in powerpc:

92: perf all metrics test : Ok

Signed-off-by: Kajol Jain <kjain at linux.ibm.com>
---
 tools/perf/tests/shell/stat_all_metrics.sh | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/perf/tests/shell/stat_all_metrics.sh b/tools/perf/tests/shell/stat_all_metrics.sh
index 6e79349e42be..d49832a316d9 100755
--- a/tools/perf/tests/shell/stat_all_metrics.sh
+++ b/tools/perf/tests/shell/stat_all_metrics.sh
@@ -23,6 +23,13 @@ for m in $(perf list --raw-dump metrics); do
   then
     continue
   fi
+  # Failed again, possibly the event is uncore pmu event which will need
+  # system wide monitoring with workload, so retry with -a option
+  result=$(perf stat -M "$m" -a perf bench internals synthesize 2>&1)
+  if [[ "$result" =~ "${m:0:50}" ]]
+  then
+    continue
+  fi
   echo "Metric '$m' not printed in:"
   echo "$result"
   if [[ "$err" != "1" ]]
-- 
2.39.0