xref: /kernel/linux/linux-6.6/tools/perf/pmu-events/arch/x86/amdzen4/pipeline.json

[
  {
    "MetricName": "total_dispatch_slots",
    "BriefDescription": "Total dispatch slots (upto 6 instructions can be dispatched in each cycle).",
    "MetricExpr": "6 * ls_not_halted_cyc"
  },
  {
    "MetricName": "frontend_bound",
    "BriefDescription": "Fraction of dispatch slots that remained unused because the frontend did not supply enough instructions/ops.",
    "MetricExpr": "d_ratio(de_no_dispatch_per_slot.no_ops_from_frontend, total_dispatch_slots)",
    "MetricGroup": "PipelineL1",
    "ScaleUnit": "100%"
  },
  {
    "MetricName": "bad_speculation",
    "BriefDescription": "Fraction of dispatched ops that did not retire.",
    "MetricExpr": "d_ratio(de_src_op_disp.all - ex_ret_ops, total_dispatch_slots)",
    "MetricGroup": "PipelineL1",
    "ScaleUnit": "100%"
  },
  {
    "MetricName": "backend_bound",
    "BriefDescription": "Fraction of dispatch slots that remained unused because of backend stalls.",
    "MetricExpr": "d_ratio(de_no_dispatch_per_slot.backend_stalls, total_dispatch_slots)",
    "MetricGroup": "PipelineL1",
    "ScaleUnit": "100%"
  },
  {
    "MetricName": "smt_contention",
    "BriefDescription": "Fraction of dispatch slots that remained unused because the other thread was selected.",
    "MetricExpr": "d_ratio(de_no_dispatch_per_slot.smt_contention, total_dispatch_slots)",
    "MetricGroup": "PipelineL1",
    "ScaleUnit": "100%"
  },
  {
    "MetricName": "retiring",
    "BriefDescription": "Fraction of dispatch slots used by ops that retired.",
    "MetricExpr": "d_ratio(ex_ret_ops, total_dispatch_slots)",
    "MetricGroup": "PipelineL1",
    "ScaleUnit": "100%"
  },
  {
    "MetricName": "frontend_bound_latency",
    "BriefDescription": "Fraction of dispatch slots that remained unused because of a latency bottleneck in the frontend (such as instruction cache or TLB misses).",
    "MetricExpr": "d_ratio((6 * cpu@de_no_dispatch_per_slot.no_ops_from_frontend\\,cmask\\=0x6@), total_dispatch_slots)",
    "MetricGroup": "PipelineL2;frontend_bound_group",
    "ScaleUnit": "100%"
  },
  {
    "MetricName": "frontend_bound_bandwidth",
    "BriefDescription": "Fraction of dispatch slots that remained unused because of a bandwidth bottleneck in the frontend (such as decode or op cache fetch bandwidth).",
    "MetricExpr": "d_ratio(de_no_dispatch_per_slot.no_ops_from_frontend - (6 * cpu@de_no_dispatch_per_slot.no_ops_from_frontend\\,cmask\\=0x6@), total_dispatch_slots)",
    "MetricGroup": "PipelineL2;frontend_bound_group",
    "ScaleUnit": "100%"
  },
  {
    "MetricName": "bad_speculation_mispredicts",
    "BriefDescription": "Fraction of dispatched ops that were flushed due to branch mispredicts.",
    "MetricExpr": "d_ratio(bad_speculation * ex_ret_brn_misp, ex_ret_brn_misp + resyncs_or_nc_redirects)",
    "MetricGroup": "PipelineL2;bad_speculation_group",
    "ScaleUnit": "100%"
  },
  {
    "MetricName": "bad_speculation_pipeline_restarts",
    "BriefDescription": "Fraction of dispatched ops that were flushed due to pipeline restarts (resyncs).",
    "MetricExpr": "d_ratio(bad_speculation * resyncs_or_nc_redirects, ex_ret_brn_misp + resyncs_or_nc_redirects)",
    "MetricGroup": "PipelineL2;bad_speculation_group",
    "ScaleUnit": "100%"
  },
  {
    "MetricName": "backend_bound_memory",
    "BriefDescription": "Fraction of dispatch slots that remained unused because of stalls due to the memory subsystem.",
    "MetricExpr": "backend_bound * d_ratio(ex_no_retire.load_not_complete, ex_no_retire.not_complete)",
    "MetricGroup": "PipelineL2;backend_bound_group",
    "ScaleUnit": "100%"
  },
  {
    "MetricName": "backend_bound_cpu",
    "BriefDescription": "Fraction of dispatch slots that remained unused because of stalls not related to the memory subsystem.",
    "MetricExpr": "backend_bound * (1 - d_ratio(ex_no_retire.load_not_complete, ex_no_retire.not_complete))",
    "MetricGroup": "PipelineL2;backend_bound_group",
    "ScaleUnit": "100%"
  },
  {
    "MetricName": "retiring_fastpath",
    "BriefDescription": "Fraction of dispatch slots used by fastpath ops that retired.",
    "MetricExpr": "retiring * (1 - d_ratio(ex_ret_ucode_ops, ex_ret_ops))",
    "MetricGroup": "PipelineL2;retiring_group",
    "ScaleUnit": "100%"
  },
  {
    "MetricName": "retiring_microcode",
    "BriefDescription": "Fraction of dispatch slots used by microcode ops that retired.",
    "MetricExpr": "retiring * d_ratio(ex_ret_ucode_ops, ex_ret_ops)",
    "MetricGroup": "PipelineL2;retiring_group",
    "ScaleUnit": "100%"
  }
]