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Subject[PATCH v3 17/20] perf jevents: Add dir breakdown metrics for Intel
From
Breakdown directory hit, misses and requests. The implementation uses
the M2M and CHA PMUs present in server models broadwellde, broadwellx
cascadelakex, emeraldrapids, icelakex, sapphirerapids and skylakex.

Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/pmu-events/intel_metrics.py | 36 ++++++++++++++++++++++++++
1 file changed, 36 insertions(+)

diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events/intel_metrics.py
index 254a4e73d926..0e3ead0fa0b1 100755
--- a/tools/perf/pmu-events/intel_metrics.py
+++ b/tools/perf/pmu-events/intel_metrics.py
@@ -777,6 +777,41 @@ def IntelLdSt() -> Optional[MetricGroup]:
], description = "Breakdown of load/store instructions")


+def UncoreDir() -> Optional[MetricGroup]:
+ try:
+ m2m_upd = Event("UNC_M2M_DIRECTORY_UPDATE.ANY")
+ m2m_hits = Event("UNC_M2M_DIRECTORY_HIT.DIRTY_I")
+ # Turn the umask into a ANY rather than DIRTY_I filter.
+ m2m_hits.name += "/umask=0xFF,name=UNC_M2M_DIRECTORY_HIT.ANY/"
+ m2m_miss = Event("UNC_M2M_DIRECTORY_MISS.DIRTY_I")
+ # Turn the umask into a ANY rather than DIRTY_I filter.
+ m2m_miss.name += "/umask=0xFF,name=UNC_M2M_DIRECTORY_MISS.ANY/"
+ cha_upd = Event("UNC_CHA_DIR_UPDATE.HA")
+ # Turn the umask into a ANY rather than HA filter.
+ cha_upd.name += "/umask=3,name=UNC_CHA_DIR_UPDATE.ANY/"
+ except:
+ return None
+
+ m2m_total = m2m_hits + m2m_miss
+ upd = m2m_upd + cha_upd # in cache lines
+ upd_r = upd / interval_sec
+ look_r = m2m_total / interval_sec
+
+ scale = 64 / 1_000_000 # Cache lines to MB
+ return MetricGroup("dir", [
+ Metric("dir_lookup_rate", "",
+ d_ratio(m2m_total, interval_sec), "requests/s"),
+ Metric("dir_lookup_hits", "",
+ d_ratio(m2m_hits, m2m_total), "100%"),
+ Metric("dir_lookup_misses", "",
+ d_ratio(m2m_miss, m2m_total), "100%"),
+ Metric("dir_update_requests", "",
+ d_ratio(m2m_upd + cha_upd, interval_sec), "requests/s"),
+ Metric("dir_update_bw", "",
+ d_ratio(m2m_upd + cha_upd, interval_sec), f"{scale}MB/s"),
+ ])
+
+
def UncoreMem() -> Optional[MetricGroup]:
try:
loc_rds = Event("UNC_CHA_REQUESTS.READS_LOCAL", "UNC_H_REQUESTS.READS_LOCAL")
@@ -900,6 +935,7 @@ def main() -> None:
IntelMlp(),
IntelPorts(),
IntelSwpf(),
+ UncoreDir(),
UncoreMem(),
UncoreMemBw(),
])
--
2.44.0.278.ge034bb2e1d-goog

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