Use the counter mask (cmask) to see how many cycles an instruction
takes to retire. Present as a set of ILP metrics.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/pmu-events/amd_metrics.py | 36 ++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py
index 13bf3eaf498f..2101598e8b04 100755
--- a/tools/perf/pmu-events/amd_metrics.py
+++ b/tools/perf/pmu-events/amd_metrics.py
@@ -120,6 +120,41 @@ def AmdBr():
                      description="breakdown of retired branch instructions")
 
 
+def AmdIlp() -> MetricGroup:
+    tsc = Event("msr/tsc/")
+    c0 = Event("msr/mperf/")
+    low = tsc - c0
+    inst_ret = Event("ex_ret_instr")
+    inst_ret_c = [Event(f"{inst_ret.name}/cmask={x}/") for x in range(1, 6)]
+    ilp = [d_ratio(max(inst_ret_c[x] - inst_ret_c[x + 1], 0), cycles) for x in range(0, 4)]
+    ilp.append(d_ratio(inst_ret_c[4], cycles))
+    ilp0 = 1
+    for x in ilp:
+        ilp0 -= x
+    return MetricGroup("lpm_ilp", [
+        Metric("lpm_ilp_idle", "Lower power cycles as a percentage of all cycles",
+               d_ratio(low, tsc), "100%"),
+        Metric("lpm_ilp_inst_ret_0",
+               "Instructions retired in 0 cycles as a percentage of all cycles",
+               ilp0, "100%"),
+        Metric("lpm_ilp_inst_ret_1",
+               "Instructions retired in 1 cycles as a percentage of all cycles",
+               ilp[0], "100%"),
+        Metric("lpm_ilp_inst_ret_2",
+               "Instructions retired in 2 cycles as a percentage of all cycles",
+               ilp[1], "100%"),
+        Metric("lpm_ilp_inst_ret_3",
+               "Instructions retired in 3 cycles as a percentage of all cycles",
+               ilp[2], "100%"),
+        Metric("lpm_ilp_inst_ret_4",
+               "Instructions retired in 4 cycles as a percentage of all cycles",
+               ilp[3], "100%"),
+        Metric("lpm_ilp_inst_ret_5",
+               "Instructions retired in 5 or more cycles as a percentage of all cycles",
+               ilp[4], "100%"),
+    ])
+
+
 def AmdDtlb() -> Optional[MetricGroup]:
   global _zen_model
   if _zen_model >= 4:
@@ -584,6 +619,7 @@ def main() -> None:
 
   all_metrics = MetricGroup("", [
       AmdBr(),
+      AmdIlp(),
       AmdDtlb(),
       AmdItlb(),
       AmdLdSt(),
-- 
2.51.0.318.gd7df087d1a-goog