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    Subject[PATCH RFC 0/6] Add metrics for neoverse-n2
    Date
    This series add six metricgroups for neoverse-n2, among which, the
    formula of topdown L1 is from the document:
    https://documentation-service.arm.com/static/60250c7395978b529036da86?token=

    Since neoverse-n2 does not yet support topdown L2, metricgroups such
    as Cache, TLB, Branch, InstructionsMix, and PEutilization are added to
    help further analysis of performance bottlenecks.

    with this series on neoverse-n2:

    $./perf list metricgroup

    List of pre-defined events (to be used in -e):


    Metric Groups:

    Branch
    Cache
    InstructionMix
    PEutilization
    TLB
    TopDownL1


    $./perf list

    ...
    Metric Groups:

    Branch:
    branch_miss_pred_rate
    [The rate of branches mis-predited to the overall branches]
    branch_mpki
    [The rate of branches mis-predicted per kilo instructions]
    branch_pki
    [The rate of branches retired per kilo instructions]
    Cache:
    l1d_cache_miss_rate
    [The rate of L1 D-Cache misses to the overall L1 D-Cache]
    l1d_cache_mpki
    [The rate of L1 D-Cache misses per kilo instructions]
    ...


    $sudo ./perf stat -a -M TLB sleep 1

    Performance counter stats for 'system wide':

    35,861,936 L1I_TLB # 0.00 itlb_walk_rate (74.91%)
    5,661 ITLB_WALK (74.91%)
    97,279,240 INST_RETIRED # 0.07 itlb_mpki (74.91%)
    6,851 ITLB_WALK (74.91%)
    26,391 DTLB_WALK # 0.00 dtlb_walk_rate (75.07%)
    35,585,545 L1D_TLB (75.07%)
    85,923,244 INST_RETIRED # 0.35 dtlb_mpki (75.11%)
    29,992 DTLB_WALK (75.11%)

    1.003450755 seconds time elapsed


    Jing Zhang (6):
    perf vendor events arm64: Add topdown L1 metrics for neoverse-n2
    perf vendor events arm64: Add TLB metrics for neoverse-n2
    perf vendor events arm64: Add cache metrics for neoverse-n2
    perf vendor events arm64: Add branch metrics for neoverse-n2
    perf vendor events arm64: Add PE utilization metrics for neoverse-n2
    perf vendor events arm64: Add instruction mix metrics for neoverse-n2

    .../arch/arm64/arm/neoverse-n2/metrics.json | 247 +++++++++++++++++++++
    1 file changed, 247 insertions(+)
    create mode 100644 tools/perf/pmu-events/arch/arm64/arm/neoverse-n2/metrics.json

    --
    1.8.3.1

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