1 files changed, 88 insertions, 0 deletions
diff --git a/src/plugins/perfmon/arm/bundle/mem_access.c b/src/plugins/perfmon/arm/bundle/mem_access.c
new file mode 100644
index 00000000000..cfe8f4dc425
--- /dev/null
+++ b/src/plugins/perfmon/arm/bundle/mem_access.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2022 Arm 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 <vppinfra/linux/sysfs.h>
+#include <perfmon/perfmon.h>
+#include <perfmon/arm/events.h>
+
+/* as per .events[n] in PERFMON_REGISTER_BUNDLE */
+enum
+{
+  MEM_ACCESS,
+  BUS_ACCESS,
+  MEMORY_ERROR
+};
+
+static u8 *
+format_arm_memory_access (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, "%.2f", (f64) ns->value[MEM_ACCESS] / ns->n_packets);
+      break;
+
+    case 1:
+      s = format (s, "%.3f", (f64) ns->value[BUS_ACCESS] / ns->n_packets);
+      break;
+
+    case 2:
+      s = format (s, "%llu", ns->value[MEMORY_ERROR]);
+      break;
+
+    case 3:
+      s = format (s, "%llu", ns->n_packets);
+      break;
+    }
+  return s;
+}
+
+PERFMON_REGISTER_BUNDLE (arm_memory_access) = {
+  .name = "memory-access",
+  .description = "Memory/bus accesses per pkt + total memory errors",
+  .source = "arm",
+  .type = PERFMON_BUNDLE_TYPE_NODE,
+  .events[0] = ARMV8_PMUV3_MEM_ACCESS,
+  .events[1] = ARMV8_PMUV3_BUS_ACCESS,
+  .events[2] = ARMV8_PMUV3_MEMORY_ERROR,
+  .n_events = 3,
+  .n_columns = 4,
+  .format_fn = format_arm_memory_access,
+  .column_headers = PERFMON_STRINGS ("Mem-access/pkt", "Bus-access/pkt",
+				     "Total-mem-errors", "pkts"),
+  /*
+   * set a bit for every event used in each column
+   * this allows us to disable columns at bundle registration if an
+   * event is not supported
+   */
+  .column_events = PERFMON_COLUMN_EVENTS (SET_BIT (MEM_ACCESS),
+					  SET_BIT (BUS_ACCESS),
+					  SET_BIT (MEMORY_ERROR), 0),
+  .footer =
+    "Mem-access: The counter counts Memory-read operations and Memory-write"
+    " operations that the PE made\n"
+    "Bus-access: The counter counts Memory-read operations and Memory-write"
+    " operations that access outside of the boundary of the PE and its "
+    "closely-coupled caches\n"
+    "Mem-error: Memory error refers to a physical error in memory closely "
+    "coupled to this PE, and detected by the hardware, such as a parity or"
+    " ECC error\n"
+    "- See Armv8-A Architecture Reference Manual, D7.10 PMU events and"
+    " event numbers for full description.\n"
+};