Commit 130f4245 authored by Ian Rogers's avatar Ian Rogers Committed by Arnaldo Carvalho de Melo
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perf jevents: Add mem_bw metric for Intel 



Break down memory bandwidth using uncore counters. For many models
this matches the memory_bandwidth_* metrics, but these metrics aren't
made available on all models.

Add support for free running counters.  Query the event JSON when
determining which what events/counters are available.

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 426b8442

tools/perf/pmu-events/intel_metrics.py

+62 −0
Original line number Diff line number Diff line
@@ -815,6 +815,67 @@ def IntelLdSt() -> Optional[MetricGroup]: 
    ], description="Breakdown of load/store instructions")





def UncoreMemBw() -> Optional[MetricGroup]:

    mem_events = []

    try:

        mem_events = json.load(open(f"{os.path.dirname(os.path.realpath(__file__))}"

                                    f"/arch/x86/{args.model}/uncore-memory.json"))

    except:

        pass



    ddr_rds = 0

    ddr_wrs = 0

    ddr_total = 0

    for x in mem_events:

        if "EventName" in x:

            name = x["EventName"]

            if re.search("^UNC_MC[0-9]+_RDCAS_COUNT_FREERUN", name):

                ddr_rds += Event(name)

            elif re.search("^UNC_MC[0-9]+_WRCAS_COUNT_FREERUN", name):

                ddr_wrs += Event(name)

            # elif re.search("^UNC_MC[0-9]+_TOTAL_REQCOUNT_FREERUN", name):

            #  ddr_total += Event(name)



    if ddr_rds == 0:

        try:

            ddr_rds = Event("UNC_M_CAS_COUNT.RD")

            ddr_wrs = Event("UNC_M_CAS_COUNT.WR")

        except:

            return None



    ddr_total = ddr_rds + ddr_wrs



    pmm_rds = 0

    pmm_wrs = 0

    try:

        pmm_rds = Event("UNC_M_PMM_RPQ_INSERTS")

        pmm_wrs = Event("UNC_M_PMM_WPQ_INSERTS")

    except:

        pass



    pmm_total = pmm_rds + pmm_wrs



    scale = 64 / 1_000_000

    return MetricGroup("lpm_mem_bw", [

        MetricGroup("lpm_mem_bw_ddr", [

            Metric("lpm_mem_bw_ddr_read", "DDR memory read bandwidth",

                   d_ratio(ddr_rds, interval_sec), f"{scale}MB/s"),

            Metric("lpm_mem_bw_ddr_write", "DDR memory write bandwidth",

                   d_ratio(ddr_wrs, interval_sec), f"{scale}MB/s"),

            Metric("lpm_mem_bw_ddr_total", "DDR memory write bandwidth",

                   d_ratio(ddr_total, interval_sec), f"{scale}MB/s"),

        ], description="DDR Memory Bandwidth"),

        MetricGroup("lpm_mem_bw_pmm", [

            Metric("lpm_mem_bw_pmm_read", "PMM memory read bandwidth",

                   d_ratio(pmm_rds, interval_sec), f"{scale}MB/s"),

            Metric("lpm_mem_bw_pmm_write", "PMM memory write bandwidth",

                   d_ratio(pmm_wrs, interval_sec), f"{scale}MB/s"),

            Metric("lpm_mem_bw_pmm_total", "PMM memory write bandwidth",

                   d_ratio(pmm_total, interval_sec), f"{scale}MB/s"),

        ], description="PMM Memory Bandwidth") if pmm_rds != 0 else None,

    ], description="Memory Bandwidth")





def main() -> None:

    global _args
@@ -853,6 +914,7 @@ def main() -> None: 
        IntelMlp(),

        IntelPorts(),

        IntelSwpf(),

        UncoreMemBw(),

    ])



    if _args.metricgroups: