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Message-Id: <20240926175035.408668-12-irogers@google.com>
Date: Thu, 26 Sep 2024 10:50:24 -0700
From: Ian Rogers <irogers@...gle.com>
To: 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>,
Kan Liang <kan.liang@...ux.intel.com>, linux-perf-users@...r.kernel.org,
linux-kernel@...r.kernel.org, Perry Taylor <perry.taylor@...el.com>,
Samantha Alt <samantha.alt@...el.com>, Caleb Biggers <caleb.biggers@...el.com>,
Weilin Wang <weilin.wang@...el.com>, Edward Baker <edward.baker@...el.com>
Subject: [PATCH v4 11/22] perf jevents: Add load store breakdown metrics ldst
for Intel
Give breakdown of number of instructions. Use the counter mask (cmask)
to show the number of cycles taken to retire the instructions.
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/pmu-events/intel_metrics.py | 86 +++++++++++++++++++++++++-
1 file changed, 85 insertions(+), 1 deletion(-)
diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events/intel_metrics.py
index 4ddc68006b10..d528b97e8822 100755
--- a/tools/perf/pmu-events/intel_metrics.py
+++ b/tools/perf/pmu-events/intel_metrics.py
@@ -2,7 +2,7 @@
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
from metric import (d_ratio, has_event, max, CheckPmu, Event, JsonEncodeMetric,
JsonEncodeMetricGroupDescriptions, Literal, LoadEvents,
- Metric, MetricGroup, MetricRef, Select)
+ Metric, MetricConstraint, MetricGroup, MetricRef, Select)
import argparse
import json
import math
@@ -509,6 +509,89 @@ def IntelSwpf() -> Optional[MetricGroup]:
], description="Software prefetch instruction breakdown")
+def IntelLdSt() -> Optional[MetricGroup]:
+ if _args.model in [
+ "bonnell",
+ "nehalemep",
+ "nehalemex",
+ "westmereep-dp",
+ "westmereep-sp",
+ "westmereex",
+ ]:
+ return None
+ LDST_LD = Event("MEM_INST_RETIRED.ALL_LOADS", "MEM_UOPS_RETIRED.ALL_LOADS")
+ LDST_ST = Event("MEM_INST_RETIRED.ALL_STORES", "MEM_UOPS_RETIRED.ALL_STORES")
+ LDST_LDC1 = Event(f"{LDST_LD.name}/cmask=1/")
+ LDST_STC1 = Event(f"{LDST_ST.name}/cmask=1/")
+ LDST_LDC2 = Event(f"{LDST_LD.name}/cmask=2/")
+ LDST_STC2 = Event(f"{LDST_ST.name}/cmask=2/")
+ LDST_LDC3 = Event(f"{LDST_LD.name}/cmask=3/")
+ LDST_STC3 = Event(f"{LDST_ST.name}/cmask=3/")
+ ins = Event("instructions")
+ LDST_CYC = Event("CPU_CLK_UNHALTED.THREAD",
+ "CPU_CLK_UNHALTED.CORE_P",
+ "CPU_CLK_UNHALTED.THREAD_P")
+ LDST_PRE = None
+ try:
+ LDST_PRE = Event("LOAD_HIT_PREFETCH.SWPF", "LOAD_HIT_PRE.SW_PF")
+ except:
+ pass
+ LDST_AT = None
+ try:
+ LDST_AT = Event("MEM_INST_RETIRED.LOCK_LOADS")
+ except:
+ pass
+ cyc = LDST_CYC
+
+ ld_rate = d_ratio(LDST_LD, interval_sec)
+ st_rate = d_ratio(LDST_ST, interval_sec)
+ pf_rate = d_ratio(LDST_PRE, interval_sec) if LDST_PRE else None
+ at_rate = d_ratio(LDST_AT, interval_sec) if LDST_AT else None
+
+ ldst_ret_constraint = MetricConstraint.GROUPED_EVENTS
+ if LDST_LD.name == "MEM_UOPS_RETIRED.ALL_LOADS":
+ ldst_ret_constraint = MetricConstraint.NO_GROUP_EVENTS_NMI
+
+ return MetricGroup("ldst", [
+ MetricGroup("ldst_total", [
+ Metric("ldst_total_loads", "Load/store instructions total loads",
+ ld_rate, "loads"),
+ Metric("ldst_total_stores", "Load/store instructions total stores",
+ st_rate, "stores"),
+ ]),
+ MetricGroup("ldst_prcnt", [
+ Metric("ldst_prcnt_loads", "Percent of all instructions that are loads",
+ d_ratio(LDST_LD, ins), "100%"),
+ Metric("ldst_prcnt_stores", "Percent of all instructions that are stores",
+ d_ratio(LDST_ST, ins), "100%"),
+ ]),
+ MetricGroup("ldst_ret_lds", [
+ Metric("ldst_ret_lds_1", "Retired loads in 1 cycle",
+ d_ratio(max(LDST_LDC1 - LDST_LDC2, 0), cyc), "100%",
+ constraint = ldst_ret_constraint),
+ Metric("ldst_ret_lds_2", "Retired loads in 2 cycles",
+ d_ratio(max(LDST_LDC2 - LDST_LDC3, 0), cyc), "100%",
+ constraint = ldst_ret_constraint),
+ Metric("ldst_ret_lds_3", "Retired loads in 3 or more cycles",
+ d_ratio(LDST_LDC3, cyc), "100%"),
+ ]),
+ MetricGroup("ldst_ret_sts", [
+ Metric("ldst_ret_sts_1", "Retired stores in 1 cycle",
+ d_ratio(max(LDST_STC1 - LDST_STC2, 0), cyc), "100%",
+ constraint = ldst_ret_constraint),
+ Metric("ldst_ret_sts_2", "Retired stores in 2 cycles",
+ d_ratio(max(LDST_STC2 - LDST_STC3, 0), cyc), "100%",
+ constraint = ldst_ret_constraint),
+ Metric("ldst_ret_sts_3", "Retired stores in 3 more cycles",
+ d_ratio(LDST_STC3, cyc), "100%"),
+ ]),
+ Metric("ldst_ld_hit_swpf", "Load hit software prefetches per second",
+ pf_rate, "swpf/s") if pf_rate else None,
+ Metric("ldst_atomic_lds", "Atomic loads per second",
+ at_rate, "loads/s") if at_rate else None,
+ ], description = "Breakdown of load/store instructions")
+
+
def main() -> None:
global _args
@@ -538,6 +621,7 @@ def main() -> None:
Tsx(),
IntelBr(),
IntelL2(),
+ IntelLdSt(),
IntelPorts(),
IntelSwpf(),
])
--
2.46.1.824.gd892dcdcdd-goog
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