perf vendor events amd: Fix large metrics

There are cases where a metric requires more events than the number of
available counters. E.g. AMD Zen, Zen 2 and Zen 3 processors have four
data fabric counters but the "nps1_die_to_dram" metric has eight events.

By default, the constituent events are placed in a group and since the
events cannot be scheduled at the same time, the metric is not computed.
The "all metrics" test also fails because of this.

Use the NO_GROUP_EVENTS constraint for such metrics which anyway expect
the user to run perf with "--metric-no-group".

E.g.

  $ sudo perf test -v 101

Before:

  101: perf all metrics test                                           :
  --- start ---
  test child forked, pid 37131
  Testing branch_misprediction_ratio
  Testing all_remote_links_outbound
  Testing nps1_die_to_dram
  Metric 'nps1_die_to_dram' not printed in:
  Error:
  Invalid event (dram_channel_data_controller_4) in per-thread mode, enable system wide with '-a'.
  Testing macro_ops_dispatched
  Testing all_l2_cache_accesses
  Testing all_l2_cache_hits
  Testing all_l2_cache_misses
  Testing ic_fetch_miss_ratio
  Testing l2_cache_accesses_from_l2_hwpf
  Testing l2_cache_misses_from_l2_hwpf
  Testing op_cache_fetch_miss_ratio
  Testing l3_read_miss_latency
  Testing l1_itlb_misses
  test child finished with -1
  ---- end ----
  perf all metrics test: FAILED!

After:

  101: perf all metrics test                                           :
  --- start ---
  test child forked, pid 43766
  Testing branch_misprediction_ratio
  Testing all_remote_links_outbound
  Testing nps1_die_to_dram
  Testing macro_ops_dispatched
  Testing all_l2_cache_accesses
  Testing all_l2_cache_hits
  Testing all_l2_cache_misses
  Testing ic_fetch_miss_ratio
  Testing l2_cache_accesses_from_l2_hwpf
  Testing l2_cache_misses_from_l2_hwpf
  Testing op_cache_fetch_miss_ratio
  Testing l3_read_miss_latency
  Testing l1_itlb_misses
  test child finished with 0
  ---- end ----
  perf all metrics test: Ok

Reported-by: Ayush Jain <ayush.jain3@amd.com>
Suggested-by: Ian Rogers <irogers@google.com>
Signed-off-by: Sandipan Das <sandipan.das@amd.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ananth Narayan <ananth.narayan@amd.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Santosh Shukla <santosh.shukla@amd.com>
Link: https://lore.kernel.org/r/20230706063440.54189-1-sandipan.das@amd.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/pmu-events/arch/x86/amdzen1/recommended.json b/tools/perf/pmu-events/arch/x86/amdzen1/recommended.json
index bf5083c1c2608e242a6454508589b8a4c15e65f0..4d28177325a0db7c5f71cba364f514ccb06a32d5 100644 (file)
--- a/tools/perf/pmu-events/arch/x86/amdzen1/recommended.json
+++ b/tools/perf/pmu-events/arch/x86/amdzen1/recommended.json
@@ -169,8 +169,9 @@
   },
   {
     "MetricName": "nps1_die_to_dram",
-    "BriefDescription": "Approximate: Combined DRAM B/bytes of all channels on a NPS1 node (die) (may need --metric-no-group)",
+    "BriefDescription": "Approximate: Combined DRAM B/bytes of all channels on a NPS1 node (die)",
     "MetricExpr": "dram_channel_data_controller_0 + dram_channel_data_controller_1 + dram_channel_data_controller_2 + dram_channel_data_controller_3 + dram_channel_data_controller_4 + dram_channel_data_controller_5 + dram_channel_data_controller_6 + dram_channel_data_controller_7",
+    "MetricConstraint": "NO_GROUP_EVENTS",
     "MetricGroup": "data_fabric",
     "PerPkg": "1",
     "ScaleUnit": "6.1e-5MiB"

diff --git a/tools/perf/pmu-events/arch/x86/amdzen2/recommended.json b/tools/perf/pmu-events/arch/x86/amdzen2/recommended.json
index a71694a043babbdd450f63df48a95ae353b9c469..60e19456d4c8617040fb4fc3c243c91a328885c3 100644 (file)
--- a/tools/perf/pmu-events/arch/x86/amdzen2/recommended.json
+++ b/tools/perf/pmu-events/arch/x86/amdzen2/recommended.json
@@ -169,8 +169,9 @@
   },
   {
     "MetricName": "nps1_die_to_dram",
-    "BriefDescription": "Approximate: Combined DRAM B/bytes of all channels on a NPS1 node (die) (may need --metric-no-group)",
+    "BriefDescription": "Approximate: Combined DRAM B/bytes of all channels on a NPS1 node (die)",
     "MetricExpr": "dram_channel_data_controller_0 + dram_channel_data_controller_1 + dram_channel_data_controller_2 + dram_channel_data_controller_3 + dram_channel_data_controller_4 + dram_channel_data_controller_5 + dram_channel_data_controller_6 + dram_channel_data_controller_7",
+    "MetricConstraint": "NO_GROUP_EVENTS",
     "MetricGroup": "data_fabric",
     "PerPkg": "1",
     "ScaleUnit": "6.1e-5MiB"

diff --git a/tools/perf/pmu-events/arch/x86/amdzen3/recommended.json b/tools/perf/pmu-events/arch/x86/amdzen3/recommended.json
index 988cf68ae8251d677e091af155257abc188d4f7b..3e9e1781812ee548a44b293b58c2463830b31720 100644 (file)
--- a/tools/perf/pmu-events/arch/x86/amdzen3/recommended.json
+++ b/tools/perf/pmu-events/arch/x86/amdzen3/recommended.json
@@ -205,10 +205,11 @@
   },
   {
     "MetricName": "nps1_die_to_dram",
-    "BriefDescription": "Approximate: Combined DRAM B/bytes of all channels on a NPS1 node (die) (may need --metric-no-group)",
+    "BriefDescription": "Approximate: Combined DRAM B/bytes of all channels on a NPS1 node (die)",
     "MetricExpr": "dram_channel_data_controller_0 + dram_channel_data_controller_1 + dram_channel_data_controller_2 + dram_channel_data_controller_3 + dram_channel_data_controller_4 + dram_channel_data_controller_5 + dram_channel_data_controller_6 + dram_channel_data_controller_7",
     "MetricGroup": "data_fabric",
     "PerPkg": "1",
+    "MetricConstraint": "NO_GROUP_EVENTS",
     "ScaleUnit": "6.1e-5MiB"
   }
 ]