perfmon: new perfmon plugin

Type: feature
Change-Id: I2c14f82393d11fc05c6d229f5c58603ab5c0f14d
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/src/plugins/perfmon/intel/bundle/load_blocks.c b/src/plugins/perfmon/intel/bundle/load_blocks.c
new file mode 100644
index 00000000000..d02ef3a0555
--- /dev/null
+++ b/src/plugins/perfmon/intel/bundle/load_blocks.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/vnet.h>
+#include <perfmon/perfmon.h>
+#include <perfmon/intel/core.h>
+
+static u8 *
+format_load_blocks (u8 *s, va_list *args)
+{
+  perfmon_node_stats_t *ns = va_arg (*args, perfmon_node_stats_t *);
+  int row = va_arg (*args, int);
+
+  switch (row)
+    {
+    case 0:
+      s = format (s, "%12lu", ns->n_calls);
+      break;
+    case 1:
+      s = format (s, "%12lu", ns->n_packets);
+      break;
+    case 2:
+      s = format (s, "%9.2f", (f64) ns->value[0] / ns->n_calls);
+      break;
+    case 3:
+      s = format (s, "%9.2f", (f64) ns->value[1] / ns->n_calls);
+      break;
+    case 4:
+      s = format (s, "%9.2f", (f64) ns->value[2] / ns->n_calls);
+      break;
+    }
+  return s;
+}
+
+PERFMON_REGISTER_BUNDLE (load_blocks) = {
+  .name = "load-blocks",
+  .description = "load operations blocked due to various uarch reasons",
+  .source = "intel-core",
+  .type = PERFMON_BUNDLE_TYPE_NODE,
+  .events[0] = INTEL_CORE_E_LD_BLOCKS_STORE_FORWARD,
+  .events[1] = INTEL_CORE_E_LD_BLOCKS_NO_SR,
+  .events[2] = INTEL_CORE_E_LD_BLOCKS_PARTIAL_ADDRESS_ALIAS,
+  .n_events = 3,
+  .format_fn = format_load_blocks,
+  .column_headers = PERFMON_STRINGS ("Calls", "Packets", "[1]", "[2]", "[3]"),
+  .footer = "Per node call statistics:\n"
+	    "[1] Loads blocked due to overlapping with a preceding store that "
+	    "cannot be forwarded.\n"
+	    "[2] The number of times that split load operations are "
+	    "temporarily blocked because\n"
+	    "    all resources for handling the split accesses are in use\n"
+	    "[3] False dependencies in Memory Order Buffer (MOB) due to "
+	    "partial compare on address.\n",
+};