perfmon: add Arm event bundles

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

diff --git a/src/plugins/perfmon/arm/bundle/cache_inst_tlb.c b/src/plugins/perfmon/arm/bundle/cache_inst_tlb.c
new file mode 100644 (file)
index 0000000..7366be2
--- /dev/null
+++ b/src/plugins/perfmon/arm/bundle/cache_inst_tlb.c
@@ -0,0 +1,105 @@
+/*
+ * 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>
+
+enum /* as per .events[n] in PERFMON_REGISTER_BUNDLE */
+{
+  L1I_TLB,
+  L1I_TLB_REFILL,
+  L2I_TLB,
+  L2I_TLB_REFILL,
+};
+
+static u8 *
+format_arm_cache_inst_tlb (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[L1I_TLB] / ns->n_packets);
+      break;
+
+    case 1:
+      s = format (s, "%.2f", (f64) ns->value[L1I_TLB_REFILL] / ns->n_packets);
+      break;
+
+    case 2:
+      s = format (s, "%.2f%%",
+                 (ns->value[L1I_TLB] ? (f64) ns->value[L1I_TLB_REFILL] /
+                                         ns->value[L1I_TLB] * 100 :
+                                             0));
+      break;
+
+    case 3:
+      s = format (s, "%.2f", (f64) ns->value[L2I_TLB] / ns->n_packets);
+      break;
+
+    case 4:
+      s = format (s, "%.2f", (f64) ns->value[L2I_TLB_REFILL] / ns->n_packets);
+      break;
+
+    case 5:
+      s = format (s, "%.2f%%",
+                 (ns->value[L2I_TLB] ? (f64) ns->value[L2I_TLB_REFILL] /
+                                         ns->value[L2I_TLB] * 100 :
+                                             0));
+      break;
+
+    case 6:
+      s = format (s, "%llu", ns->n_packets);
+      break;
+    }
+  return s;
+}
+
+PERFMON_REGISTER_BUNDLE (arm_cache_inst_tlb) = {
+  .name = "cache-inst-tlb",
+  .description =
+    "L1/L2 instruction TLB cache accesses, refills, walks per packet",
+  .source = "arm",
+  .type = PERFMON_BUNDLE_TYPE_NODE,
+  .events[0] = ARMV8_PMUV3_L1I_TLB,
+  .events[1] = ARMV8_PMUV3_L1I_TLB_REFILL,
+  .events[2] = ARMV8_PMUV3_L2I_TLB,
+  .events[3] = ARMV8_PMUV3_L2I_TLB_REFILL,
+  .n_events = 4,
+  .n_columns = 7,
+  .format_fn = format_arm_cache_inst_tlb,
+  .column_headers = PERFMON_STRINGS ("L1I-TLB: access", "refill", "\%*",
+                                    "L2I-TLB: access", "refill", "\%*",
+                                    "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 (L1I_TLB), SET_BIT (L1I_TLB_REFILL),
+    SET_BIT (L1I_TLB) | SET_BIT (L1I_TLB_REFILL), SET_BIT (L2I_TLB),
+    SET_BIT (L2I_TLB_REFILL), SET_BIT (L2I_TLB) | SET_BIT (L2I_TLB_REFILL), 0),
+  .footer = "all stats are per packet except refill rate (\%)\n"
+           "*\% percentage shown is total refills/accesses\n\n"
+           "TLB: Instruction memory access that causes a TLB access to at "
+           "least the Level 1/2 instruction TLB.\n"
+           "- See Armv8-A Architecture Reference Manual, D7.10 PMU events and"
+           " event numbers for full description.\n"
+};