[PATCH v9 19/48] perf jevents: Add itlb metric group for AMD

[Ian Rogers <irogers@google.com>]

Add metrics that give an overview and details of the l1 itlb (zen1,
zen2, zen3) and l2 itlb (all zens).

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Sandipan Das <sandipan.das@amd.com>
---
 tools/perf/pmu-events/amd_metrics.py | 49 ++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py
index 1880ccf9c6fc..7a418990a767 100755
--- a/tools/perf/pmu-events/amd_metrics.py
+++ b/tools/perf/pmu-events/amd_metrics.py
@@ -121,6 +121,54 @@ def AmdBr():
                        description="breakdown of retired branch instructions")
 
 
+def AmdItlb():
+    global _zen_model
+    l2h = Event("bp_l1_tlb_miss_l2_tlb_hit", "bp_l1_tlb_miss_l2_hit")
+    l2m = Event("l2_itlb_misses")
+    l2r = l2h + l2m
+
+    itlb_l1_mg = None
+    l1m = l2r
+    if _zen_model <= 3:
+        l1r = Event("ic_fw32")
+        l1h = max(l1r - l1m, 0)
+        itlb_l1_mg = MetricGroup("lpm_itlb_l1", [
+            Metric("lpm_itlb_l1_hits",
+                   "L1 ITLB hits as a perecentage of L1 ITLB accesses.",
+                   d_ratio(l1h, l1h + l1m), "100%"),
+            Metric("lpm_itlb_l1_miss",
+                   "L1 ITLB misses as a perecentage of L1 ITLB accesses.",
+                   d_ratio(l1m, l1h + l1m), "100%"),
+            Metric("lpm_itlb_l1_reqs",
+                   "The number of 32B fetch windows transferred from IC pipe to DE "
+                   "instruction decoder per second.", d_ratio(
+                       l1r, interval_sec),
+                   "windows/sec"),
+        ])
+
+    return MetricGroup("lpm_itlb", [
+        MetricGroup("lpm_itlb_ov", [
+            Metric("lpm_itlb_ov_insn_bt_l1_miss",
+                   "Number of instructions between l1 misses", d_ratio(
+                       ins, l1m), "insns"),
+            Metric("lpm_itlb_ov_insn_bt_l2_miss",
+                   "Number of instructions between l2 misses", d_ratio(
+                       ins, l2m), "insns"),
+        ]),
+        itlb_l1_mg,
+        MetricGroup("lpm_itlb_l2", [
+            Metric("lpm_itlb_l2_hits",
+                   "L2 ITLB hits as a percentage of all L2 ITLB accesses.",
+                   d_ratio(l2h, l2r), "100%"),
+            Metric("lpm_itlb_l2_miss",
+                   "L2 ITLB misses as a percentage of all L2 ITLB accesses.",
+                   d_ratio(l2m, l2r), "100%"),
+            Metric("lpm_itlb_l2_reqs", "ITLB accesses per second.",
+                   d_ratio(l2r, interval_sec), "accesses/sec"),
+        ]),
+    ], description="Instruction TLB breakdown")
+
+
 def AmdUpc() -> Metric:
     ops = Event("ex_ret_ops", "ex_ret_cops")
     upc = d_ratio(ops, smt_cycles)
@@ -187,6 +235,7 @@ def main() -> None:
 
     all_metrics = MetricGroup("", [
         AmdBr(),
+        AmdItlb(),
         AmdUpc(),
         Idle(),
         Rapl(),
-- 
2.52.0.158.g65b55ccf14-goog