perf jevents: Add dir breakdown metrics for Intel

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>
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>

diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events/intel_metrics.py
index 983e5021f3d3cff76def99ca5b60990ac0e1f11e..24ceb7f8719b65304d11dbc1a1a7f232f2950bbe 100755 (executable)
--- a/tools/perf/pmu-events/intel_metrics.py
+++ b/tools/perf/pmu-events/intel_metrics.py
@@ -815,6 +815,41 @@ 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("lpm_dir", [
+        Metric("lpm_dir_lookup_rate", "",
+               d_ratio(m2m_total, interval_sec), "requests/s"),
+        Metric("lpm_dir_lookup_hits", "",
+               d_ratio(m2m_hits, m2m_total), "100%"),
+        Metric("lpm_dir_lookup_misses", "",
+               d_ratio(m2m_miss, m2m_total), "100%"),
+        Metric("lpm_dir_update_requests", "",
+               d_ratio(m2m_upd + cha_upd, interval_sec), "requests/s"),
+        Metric("lpm_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",
@@ -944,6 +979,7 @@ def main() -> None:
         IntelMlp(),
         IntelPorts(),
         IntelSwpf(),
+        UncoreDir(),
         UncoreMem(),
         UncoreMemBw(),
     ])