[PATCH v1 09/20] perf jevents: Add load store breakdown metrics ldst for Intel

Ian Rogers
2024-02-29T00:18:45Z

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@google.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 d22a1abca8d9..0035e2441d6b 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, Event, JsonEncodeMetric,
JsonEncodeMetricGroupDescriptions, Literal, LoadEvents,
- Metric, MetricGroup, MetricRef, Select)
+ Metric, MetricConstraint, MetricGroup, MetricRef, Select)
import argparse
import json
import math
@@ -514,6 +514,89 @@ def IntelSwpf() -> Optional[MetricGroup]:
], description="Sofware 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")
+
+
all_metrics = MetricGroup("", [
Idle(),
Rapl(),
@@ -521,6 +604,7 @@ all_metrics = MetricGroup("", [
Tsx(),
IntelBr(),
IntelL2(),
+ IntelLdSt(),
IntelPorts(),
IntelSwpf(),
])
--
2.44.0.278.ge034bb2e1d-goog