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perf jevents: Add upi_bw metric for Intel

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Break down UPI read and write bandwidth using uncore_upi counters.

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 10:45:03 -08:00 committed by Arnaldo Carvalho de Melo
parent 6ec3058e70
commit 5dc81578ad
1 changed files with 22 additions and 0 deletions
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22
tools/perf/pmu-events/intel_metrics.py
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@ -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: