linux-kernel - [PATCH v2 11/12] perf jevents: Add ILP metrics for AMD

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Message-Id: <20240301184737.2660108-12-irogers@google.com>
Date: Fri,  1 Mar 2024 10:47:36 -0800
From: Ian Rogers <irogers@...gle.com>
To: Sandipan Das <sandipan.das@....com>, Ravi Bangoria <ravi.bangoria@....com>, 
	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	John Garry <john.g.garry@...cle.com>, Kan Liang <kan.liang@...ux.intel.com>, 
	Jing Zhang <renyu.zj@...ux.alibaba.com>, Thomas Richter <tmricht@...ux.ibm.com>, 
	James Clark <james.clark@....com>, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org, Stephane Eranian <eranian@...gle.com>
Subject: [PATCH v2 11/12] perf jevents: Add ILP metrics for AMD

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@...gle.com>
---
 tools/perf/pmu-events/amd_metrics.py | 30 ++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py
index 6b182a9bbfe5..91f323c1a149 100755
--- a/tools/perf/pmu-events/amd_metrics.py
+++ b/tools/perf/pmu-events/amd_metrics.py
@@ -125,6 +125,35 @@ 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("ilp", [
+        Metric("ilp_idle", "Lower power cycles as a percentage of all cycles",
+               d_ratio(low, tsc), "100%"),
+        Metric("ilp_inst_ret_0", "Instructions retired in 0 cycles as a percentage of all cycles",
+               ilp0, "100%"),
+        Metric("ilp_inst_ret_1", "Instructions retired in 1 cycles as a percentage of all cycles",
+               ilp[0], "100%"),
+        Metric("ilp_inst_ret_2", "Instructions retired in 2 cycles as a percentage of all cycles",
+               ilp[1], "100%"),
+        Metric("ilp_inst_ret_3", "Instructions retired in 3 cycles as a percentage of all cycles",
+               ilp[2], "100%"),
+        Metric("ilp_inst_ret_4", "Instructions retired in 4 cycles as a percentage of all cycles",
+               ilp[3], "100%"),
+        Metric("ilp_inst_ret_5", "Instructions retired in 5 or more cycles as a percentage of all cycles",
+               ilp[4], "100%"),
+    ])
+
+
 def AmdDtlb() -> Optional[MetricGroup]:
   if zen_model >= 4:
       return None
@@ -560,6 +589,7 @@ def UncoreL3():
 
 all_metrics = MetricGroup("", [
     AmdBr(),
+    AmdIlp(),
     AmdDtlb(),
     AmdItlb(),
     AmdLdSt(),
-- 
2.44.0.278.ge034bb2e1d-goog