linux-kernel - [PATCH v8 48/52] perf jevents: Add upi

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251113032040.1994090-49-irogers@google.com>
Date: Wed, 12 Nov 2025 19:20:36 -0800
From: Ian Rogers <irogers@...gle.com>
To: Adrian Hunter <adrian.hunter@...el.com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Benjamin Gray <bgray@...ux.ibm.com>, 
	Caleb Biggers <caleb.biggers@...el.com>, Edward Baker <edward.baker@...el.com>, 
	Ian Rogers <irogers@...gle.com>, Ingo Molnar <mingo@...hat.com>, 
	James Clark <james.clark@...aro.org>, Jing Zhang <renyu.zj@...ux.alibaba.com>, 
	Jiri Olsa <jolsa@...nel.org>, John Garry <john.g.garry@...cle.com>, Leo Yan <leo.yan@....com>, 
	Namhyung Kim <namhyung@...nel.org>, Perry Taylor <perry.taylor@...el.com>, 
	Peter Zijlstra <peterz@...radead.org>, Samantha Alt <samantha.alt@...el.com>, 
	Sandipan Das <sandipan.das@....com>, Thomas Falcon <thomas.falcon@...el.com>, 
	Weilin Wang <weilin.wang@...el.com>, Xu Yang <xu.yang_2@....com>, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org
Subject: [PATCH v8 48/52] perf jevents: Add upi_bw metric for Intel

Break down UPI read and write bandwidth using uncore_upi counters.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/pmu-events/intel_metrics.py | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events/intel_metrics.py
index 037f9b2ea1b6..f6bb691dc5bb 100755
--- a/tools/perf/pmu-events/intel_metrics.py
+++ b/tools/perf/pmu-events/intel_metrics.py
@@ -1033,6 +1033,27 @@ def UncoreMemBw() -> Optional[MetricGroup]:
     ], description="Memory Bandwidth")
 
 
+def UncoreUpiBw() -> Optional[MetricGroup]:
+    try:
+        upi_rds = Event("UNC_UPI_RxL_FLITS.ALL_DATA")
+        upi_wrs = Event("UNC_UPI_TxL_FLITS.ALL_DATA")
+    except:
+        return None
+
+    upi_total = upi_rds + upi_wrs
+
+    # From "Uncore Performance Monitoring": When measuring the amount of
+    # bandwidth consumed by transmission of the data (i.e. NOT including
+    # the header), it should be .ALL_DATA / 9 * 64B.
+    scale = (64 / 9) / 1_000_000
+    return MetricGroup("lpm_upi_bw", [
+        Metric("lpm_upi_bw_read", "UPI read bandwidth",
+               d_ratio(upi_rds, interval_sec), f"{scale}MB/s"),
+        Metric("lpm_upi_bw_write", "DDR memory write bandwidth",
+               d_ratio(upi_wrs, interval_sec), f"{scale}MB/s"),
+    ], description="UPI Bandwidth")
+
+
 def main() -> None:
     global _args
 
@@ -1076,6 +1097,7 @@ def main() -> None:
         UncoreDir(),
         UncoreMem(),
         UncoreMemBw(),
+        UncoreUpiBw(),
     ])
 
     if _args.metricgroups:
-- 
2.51.2.1041.gc1ab5b90ca-goog