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perf jevents: Add local/remote miss latency metrics for Intel

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Derive from CBOX/CHA occupancy and inserts the average latency as is
provided in Intel's uncore performance monitoring reference.

Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Thomas Falcon <thomas.falcon@intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Benjamin Gray <bgray@linux.ibm.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Edward Baker <edward.baker@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: Xu Yang <xu.yang_2@nxp.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2026-01-27 10:45:02 -08:00 committed by Arnaldo Carvalho de Melo
parent 1fee2701a7
commit 6ec3058e70
1 changed files with 67 additions and 3 deletions
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70
tools/perf/pmu-events/intel_metrics.py
View File

@ -6,9 +6,10 @@ import math
import os
import re
from typing import Optional
from metric import (d_ratio, has_event, max, CheckPmu, Event, JsonEncodeMetric,
JsonEncodeMetricGroupDescriptions, Literal, LoadEvents,
Metric, MetricConstraint, MetricGroup, MetricRef, Select)
from metric import (d_ratio, has_event, max, source_count, CheckPmu, Event,
JsonEncodeMetric, JsonEncodeMetricGroupDescriptions,
Literal, LoadEvents, Metric, MetricConstraint, MetricGroup,
MetricRef, Select)
# Global command line arguments.
_args = None
@ -624,6 +625,68 @@ def IntelL2() -> Optional[MetricGroup]:
], description="L2 data cache analysis")
def IntelMissLat() -> Optional[MetricGroup]:
try:
ticks = Event("UNC_CHA_CLOCKTICKS", "UNC_C_CLOCKTICKS")
data_rd_loc_occ = Event("UNC_CHA_TOR_OCCUPANCY.IA_MISS_DRD_LOCAL",
"UNC_CHA_TOR_OCCUPANCY.IA_MISS",
"UNC_C_TOR_OCCUPANCY.MISS_LOCAL_OPCODE",
"UNC_C_TOR_OCCUPANCY.MISS_OPCODE")
data_rd_loc_ins = Event("UNC_CHA_TOR_INSERTS.IA_MISS_DRD_LOCAL",
"UNC_CHA_TOR_INSERTS.IA_MISS",
"UNC_C_TOR_INSERTS.MISS_LOCAL_OPCODE",
"UNC_C_TOR_INSERTS.MISS_OPCODE")
data_rd_rem_occ = Event("UNC_CHA_TOR_OCCUPANCY.IA_MISS_DRD_REMOTE",
"UNC_CHA_TOR_OCCUPANCY.IA_MISS",
"UNC_C_TOR_OCCUPANCY.MISS_REMOTE_OPCODE",
"UNC_C_TOR_OCCUPANCY.NID_MISS_OPCODE")
data_rd_rem_ins = Event("UNC_CHA_TOR_INSERTS.IA_MISS_DRD_REMOTE",
"UNC_CHA_TOR_INSERTS.IA_MISS",
"UNC_C_TOR_INSERTS.MISS_REMOTE_OPCODE",
"UNC_C_TOR_INSERTS.NID_MISS_OPCODE")
except:
return None
if (data_rd_loc_occ.name == "UNC_C_TOR_OCCUPANCY.MISS_LOCAL_OPCODE" or
data_rd_loc_occ.name == "UNC_C_TOR_OCCUPANCY.MISS_OPCODE"):
data_rd = 0x182
for e in [data_rd_loc_occ, data_rd_loc_ins, data_rd_rem_occ, data_rd_rem_ins]:
e.name += f"/filter_opc={hex(data_rd)}/"
elif data_rd_loc_occ.name == "UNC_CHA_TOR_OCCUPANCY.IA_MISS":
# Demand Data Read - Full cache-line read requests from core for
# lines to be cached in S or E, typically for data
demand_data_rd = 0x202
# LLC Prefetch Data - Uncore will first look up the line in the
# LLC; for a cache hit, the LRU will be updated, on a miss, the
# DRd will be initiated
llc_prefetch_data = 0x25a
local_filter = (f"/filter_opc0={hex(demand_data_rd)},"
f"filter_opc1={hex(llc_prefetch_data)},"
"filter_loc,filter_nm,filter_not_nm/")
remote_filter = (f"/filter_opc0={hex(demand_data_rd)},"
f"filter_opc1={hex(llc_prefetch_data)},"
"filter_rem,filter_nm,filter_not_nm/")
for e in [data_rd_loc_occ, data_rd_loc_ins]:
e.name += local_filter
for e in [data_rd_rem_occ, data_rd_rem_ins]:
e.name += remote_filter
else:
assert data_rd_loc_occ.name == "UNC_CHA_TOR_OCCUPANCY.IA_MISS_DRD_LOCAL", data_rd_loc_occ
ticks_per_cha = ticks / source_count(data_rd_loc_ins)
loc_lat = interval_sec * 1e9 * data_rd_loc_occ / \
(ticks_per_cha * data_rd_loc_ins)
ticks_per_cha = ticks / source_count(data_rd_rem_ins)
rem_lat = interval_sec * 1e9 * data_rd_rem_occ / \
(ticks_per_cha * data_rd_rem_ins)
return MetricGroup("lpm_miss_lat", [
Metric("lpm_miss_lat_loc", "Local to a socket miss latency in nanoseconds",
loc_lat, "ns"),
Metric("lpm_miss_lat_rem", "Remote to a socket miss latency in nanoseconds",
rem_lat, "ns"),
])
def IntelMlp() -> Optional[Metric]:
try:
l1d = Event("L1D_PEND_MISS.PENDING")
@ -1005,6 +1068,7 @@ def main() -> None:
IntelIlp(),
IntelL2(),
IntelLdSt(),
IntelMissLat(),
IntelMlp(),
IntelPorts(),
IntelSwpf(),