perfmon: add Arm event bundles

[vpp.git] / src / plugins / perfmon / arm / bundle / inst_clock.c

diff --git a/src/plugins/perfmon/arm/bundle/inst_clock.c b/src/plugins/perfmon/arm/bundle/inst_clock.c
new file mode 100644 (file)
index 0000000..272e524
--- /dev/null
+++ b/src/plugins/perfmon/arm/bundle/inst_clock.c
@@ -0,0 +1,102 @@
+/*
+ * 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
+{
+  CPU_CYCLES,
+  INST_RETIRED
+};
+
+static u8 *
+format_arm_inst_clock (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, "%llu", ns->n_packets);
+      break;
+
+    case 1:
+      s = format (s, "%llu", ns->n_calls);
+      break;
+
+    case 2:
+      s = format (s, "%llu", ns->value[0]); /* Cycles */
+      break;
+
+    case 3:
+      s = format (s, "%llu", ns->value[1]); /* Inst */
+      break;
+
+    case 4:
+      s = format (s, "%.2f",
+                 (f64) ns->n_packets / ns->n_calls); /* Packets/Call */
+      break;
+
+    case 5:
+      s = format (s, "%.2f",
+                 (f64) ns->value[0] / ns->n_packets); /* Clocks/Packet */
+      break;
+
+    case 6:
+      s =
+       format (s, "%.2f",
+               (f64) ns->value[1] / ns->n_packets); /* Instructions/Packet */
+      break;
+
+    case 7:
+      s = format (s, "%.2f", (f64) ns->value[1] / ns->value[0]); /* IPC */
+      break;
+    }
+  return s;
+}
+
+PERFMON_REGISTER_BUNDLE (arm_inst_clock) = {
+  .name = "inst-and-clock",
+  .description =
+    "CPU cycles, instructions, instructions/packet, cycles/packet and IPC",
+  .source = "arm",
+  .type = PERFMON_BUNDLE_TYPE_NODE,
+  .events[0] = ARMV8_PMUV3_CPU_CYCLES,
+  .events[1] = ARMV8_PMUV3_INST_RETIRED,
+  .n_events = 2,
+  .n_columns = 8,
+  .format_fn = format_arm_inst_clock,
+  .column_headers = PERFMON_STRINGS ("Packets", "Calls", "CPU Cycles", "Inst*",
+                                    "Pkts/Call", "Cycles/Pkt", "Inst/Pkt",
+                                    "IPC"),
+  /*
+   * 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 (0, 0, SET_BIT (CPU_CYCLES), SET_BIT (INST_RETIRED),
+                          0, SET_BIT (CPU_CYCLES), SET_BIT (INST_RETIRED),
+                          SET_BIT (CPU_CYCLES) | SET_BIT (INST_RETIRED)),
+  .footer = "* Instructions retired: the counter increments for every "
+           "architecturally executed instruction\n"
+           "- See Armv8-A Architecture Reference Manual, D7.10 PMU events and"
+           " event numbers for full description.\n"
+};