[PATCH v1 17/20] perf jevents: Add dir breakdown metrics for Intel

Ian Rogers
2024-02-29T00:19:04Z

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 82fd23cf5500..07aafdf77f79 100755
--- a/tools/perf/pmu-events/intel_metrics.py
+++ b/tools/perf/pmu-events/intel_metrics.py
@@ -800,6 +800,41 @@ 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")
@@ -902,6 +937,7 @@ all_metrics = MetricGroup("", [
IntelMlp(),
IntelPorts(),
IntelSwpf(),
+ UncoreDir(),
UncoreMem(),
UncoreMemBw(),
])
--
2.44.0.278.ge034bb2e1d-goog