[PATCH v10 32/35] perf jevents: Add upi_bw metric for Intel

[Ian Rogers <irogers@google.com>]

Break down UPI read and write bandwidth using uncore_upi counters.

Tested-by: Thomas Falcon <thomas.falcon@intel.com>
Signed-off-by: Ian Rogers <irogers@google.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:
-- 
2.52.0.457.g6b5491de43-goog