Commit 1fee2701 authored by Ian Rogers's avatar Ian Rogers Committed by Arnaldo Carvalho de Melo
Browse files

perf jevents: Add C-State metrics from the PCU PMU for Intel 

Use occupancy events fixed in:

  https://lore.kernel.org/lkml/20240226201517.3540187-1-irogers@google.com/



Metrics are at the socket level referring to cores, not hyperthreads.

Signed-off-by: default avatarIan Rogers <irogers@google.com>
Tested-by: default avatarThomas 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 2166b44b

tools/perf/pmu-events/intel_metrics.py

+30 −0
Original line number Diff line number Diff line
@@ -815,6 +815,35 @@ def IntelLdSt() -> Optional[MetricGroup]: 
    ], description="Breakdown of load/store instructions")





def UncoreCState() -> Optional[MetricGroup]:

    try:

        pcu_ticks = Event("UNC_P_CLOCKTICKS")

        c0 = Event("UNC_P_POWER_STATE_OCCUPANCY.CORES_C0")

        c3 = Event("UNC_P_POWER_STATE_OCCUPANCY.CORES_C3")

        c6 = Event("UNC_P_POWER_STATE_OCCUPANCY.CORES_C6")

    except:

        return None



    num_cores = Literal("#num_cores") / Literal("#num_packages")



    max_cycles = pcu_ticks * num_cores

    total_cycles = c0 + c3 + c6



    # remove fused-off cores which show up in C6/C7.

    c6 = Select(max(c6 - (total_cycles - max_cycles), 0),

                total_cycles > max_cycles,

                c6)



    return MetricGroup("lpm_cstate", [

        Metric("lpm_cstate_c0", "C-State cores in C0/C1",

               d_ratio(c0, pcu_ticks), "cores"),

        Metric("lpm_cstate_c3", "C-State cores in C3",

               d_ratio(c3, pcu_ticks), "cores"),

        Metric("lpm_cstate_c6", "C-State cores in C6/C7",

               d_ratio(c6, pcu_ticks), "cores"),

    ])





def UncoreDir() -> Optional[MetricGroup]:

    try:

        m2m_upd = Event("UNC_M2M_DIRECTORY_UPDATE.ANY")
@@ -979,6 +1008,7 @@ def main() -> None: 
        IntelMlp(),

        IntelPorts(),

        IntelSwpf(),

        UncoreCState(),

        UncoreDir(),

        UncoreMem(),

        UncoreMemBw(),