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perf jevents: Add local/remote "mem" breakdown metrics for Intel

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Breakdown local and remote memory bandwidth, read and writes.

The implementation uses the HA and CHA PMUs present in server models
broadwellde, broadwellx cascadelakex, emeraldrapids, haswellx, icelakex,
ivytown, sapphirerapids and skylakex.

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 10:44:59 -08:00 committed by Arnaldo Carvalho de Melo
parent 130f4245af
commit cde9c1a5d9
1 changed files with 31 additions and 0 deletions
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31
tools/perf/pmu-events/intel_metrics.py
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@ -815,6 +815,36 @@ def IntelLdSt() -> Optional[MetricGroup]:
], description="Breakdown of load/store instructions")
def UncoreMem() -> Optional[MetricGroup]:
try:
loc_rds = Event("UNC_CHA_REQUESTS.READS_LOCAL",
"UNC_H_REQUESTS.READS_LOCAL")
rem_rds = Event("UNC_CHA_REQUESTS.READS_REMOTE",
"UNC_H_REQUESTS.READS_REMOTE")
loc_wrs = Event("UNC_CHA_REQUESTS.WRITES_LOCAL",
"UNC_H_REQUESTS.WRITES_LOCAL")
rem_wrs = Event("UNC_CHA_REQUESTS.WRITES_REMOTE",
"UNC_H_REQUESTS.WRITES_REMOTE")
except:
return None
scale = 64 / 1_000_000
return MetricGroup("lpm_mem", [
MetricGroup("lpm_mem_local", [
Metric("lpm_mem_local_read", "Local memory read bandwidth not including directory updates",
d_ratio(loc_rds, interval_sec), f"{scale}MB/s"),
Metric("lpm_mem_local_write", "Local memory write bandwidth not including directory updates",
d_ratio(loc_wrs, interval_sec), f"{scale}MB/s"),
]),
MetricGroup("lpm_mem_remote", [
Metric("lpm_mem_remote_read", "Remote memory read bandwidth not including directory updates",
d_ratio(rem_rds, interval_sec), f"{scale}MB/s"),
Metric("lpm_mem_remote_write", "Remote memory write bandwidth not including directory updates",
d_ratio(rem_wrs, interval_sec), f"{scale}MB/s"),
]),
], description="Memory Bandwidth breakdown local vs. remote (remote requests in). directory updates not included")
def UncoreMemBw() -> Optional[MetricGroup]:
mem_events = []
try:
@ -914,6 +944,7 @@ def main() -> None:
IntelMlp(),
IntelPorts(),
IntelSwpf(),
UncoreMem(),
UncoreMemBw(),
])