Memory bandwidth saturation from CBOX/CHA events present in
broadwellde, broadwellx, cascadelakex, haswellx, icelakex, skylakex
and snowridgex.
Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/pmu-events/intel_metrics.py | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events/intel_metrics.py
index f6bb691dc5bb..d56bab7337df 100755
--- a/tools/perf/pmu-events/intel_metrics.py
+++ b/tools/perf/pmu-events/intel_metrics.py
@@ -1033,6 +1033,22 @@ def UncoreMemBw() -> Optional[MetricGroup]:
], description="Memory Bandwidth")
+def UncoreMemSat() -> Optional[Metric]:
+ try:
+ clocks = Event("UNC_CHA_CLOCKTICKS", "UNC_C_CLOCKTICKS")
+ sat = Event("UNC_CHA_DISTRESS_ASSERTED.VERT", "UNC_CHA_FAST_ASSERTED.VERT",
+ "UNC_C_FAST_ASSERTED")
+ except:
+ return None
+
+ desc = ("Mesh Bandwidth saturation (% CBOX cycles with FAST signal asserted, "
+ "include QPI bandwidth saturation), lower is better")
+ if "UNC_CHA_" in sat.name:
+ desc = ("Mesh Bandwidth saturation (% CHA cycles with FAST signal asserted, "
+ "include UPI bandwidth saturation), lower is better")
+ return Metric("lpm_mem_sat", desc, d_ratio(sat, clocks), "100%")
+
+
def UncoreUpiBw() -> Optional[MetricGroup]:
try:
upi_rds = Event("UNC_UPI_RxL_FLITS.ALL_DATA")
@@ -1097,6 +1113,7 @@ def main() -> None:
UncoreDir(),
UncoreMem(),
UncoreMemBw(),
+ UncoreMemSat(),
UncoreUpiBw(),
])
--
2.51.2.1041.gc1ab5b90ca-goog