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[
{
"MetricName": "total_dispatch_slots",
"BriefDescription": "Total dispatch slots (up to 8 instructions can be dispatched in each cycle).",
"MetricExpr": "8 * ls_not_halted_cyc",
"ScaleUnit": "1slots"
},
{
"MetricName": "frontend_bound",
"BriefDescription": "Percentage 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%slots"
},
{
"MetricName": "bad_speculation",
"BriefDescription": "Percentage 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%ops"
},
{
"MetricName": "backend_bound",
"BriefDescription": "Percentage 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%slots"
},
{
"MetricName": "smt_contention",
"BriefDescription": "Percentage 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%slots"
},
{
"MetricName": "retiring",
"BriefDescription": "Percentage of dispatch slots used by ops that retired.",
"MetricExpr": "d_ratio(ex_ret_ops, total_dispatch_slots)",
"MetricGroup": "PipelineL1",
"ScaleUnit": "100%slots"
},
{
"MetricName": "frontend_bound_by_latency",
"BriefDescription": "Percentage of dispatch slots that remained unused because of a latency bottleneck in the frontend (such as instruction cache or TLB misses).",
"MetricExpr": "d_ratio((8 * cpu@de_no_dispatch_per_slot.no_ops_from_frontend\\,cmask\\=0x8@), total_dispatch_slots)",
"MetricGroup": "PipelineL2;frontend_bound_group",
"ScaleUnit": "100%slots"
},
{
"MetricName": "frontend_bound_by_bandwidth",
"BriefDescription": "Percentage 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 - (8 * cpu@de_no_dispatch_per_slot.no_ops_from_frontend\\,cmask\\=0x8@), total_dispatch_slots)",
"MetricGroup": "PipelineL2;frontend_bound_group",
"ScaleUnit": "100%slots"
},
{
"MetricName": "bad_speculation_from_mispredicts",
"BriefDescription": "Percentage of dispatched ops that were flushed due to branch mispredicts.",
"MetricExpr": "d_ratio(bad_speculation * ex_ret_brn_misp, ex_ret_brn_misp + bp_redirects.resync)",
"MetricGroup": "PipelineL2;bad_speculation_group",
"ScaleUnit": "100%ops"
},
{
"MetricName": "bad_speculation_from_pipeline_restarts",
"BriefDescription": "Percentage of dispatched ops that were flushed due to pipeline restarts (resyncs).",
"MetricExpr": "d_ratio(bad_speculation * bp_redirects.resync, ex_ret_brn_misp + bp_redirects.resync)",
"MetricGroup": "PipelineL2;bad_speculation_group",
"ScaleUnit": "100%ops"
},
{
"MetricName": "backend_bound_by_memory",
"BriefDescription": "Percentage 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%slots"
},
{
"MetricName": "backend_bound_by_cpu",
"BriefDescription": "Percentage 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%slots"
},
{
"MetricName": "retiring_from_fastpath",
"BriefDescription": "Percentage 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%slots"
},
{
"MetricName": "retiring_from_microcode",
"BriefDescription": "Percentage 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%slots"
}
]
|
