xref: /openbmc/linux/tools/perf/pmu-events/arch/arm64/ampere/ampereone/metrics.json (revision fe9d8c08)

[
    {
	"MetricName": "branch_miss_pred_rate",
	"MetricExpr": "BR_MIS_PRED / BR_PRED",
	"BriefDescription": "Branch predictor misprediction rate. May not count branches that are never resolved because they are in the misprediction shadow of an earlier branch",
	"MetricGroup": "branch",
        "ScaleUnit": "100%"
    },
    {
	"MetricName": "bus_utilization",
	"MetricExpr": "((BUS_ACCESS / (BUS_CYCLES * 1)) * 100)",
	"BriefDescription": "Core-to-uncore bus utilization",
	"MetricGroup": "Bus",
        "ScaleUnit": "1percent of bus cycles"
    },
    {
        "MetricName": "l1d_cache_miss_ratio",
        "MetricExpr": "(L1D_CACHE_REFILL / L1D_CACHE)",
        "BriefDescription": "This metric measures the ratio of level 1 data cache accesses missed to the total number of level 1 data cache accesses. This gives an indication of the effectiveness of the level 1 data cache.",
        "MetricGroup": "Miss_Ratio;L1D_Cache_Effectiveness",
        "ScaleUnit": "1per cache access"
    },
    {
        "MetricName": "l1i_cache_miss_ratio",
        "MetricExpr": "(L1I_CACHE_REFILL / L1I_CACHE)",
        "BriefDescription": "This metric measures the ratio of level 1 instruction cache accesses missed to the total number of level 1 instruction cache accesses. This gives an indication of the effectiveness of the level 1 instruction cache.",
        "MetricGroup": "Miss_Ratio;L1I_Cache_Effectiveness",
        "ScaleUnit": "1per cache access"
    },
    {
	"MetricName": "Miss_Ratio;l1d_cache_read_miss",
	"MetricExpr": "L1D_CACHE_LMISS_RD / L1D_CACHE_RD",
	"BriefDescription": "L1D cache read miss rate",
	"MetricGroup": "Cache",
        "ScaleUnit": "1per cache read access"
    },
    {
        "MetricName": "l2_cache_miss_ratio",
        "MetricExpr": "(L2D_CACHE_REFILL / L2D_CACHE)",
        "BriefDescription": "This metric measures the ratio of level 2 cache accesses missed to the total number of level 2 cache accesses. This gives an indication of the effectiveness of the level 2 cache, which is a unified cache that stores both data and instruction. Note that cache accesses in this cache are either data memory access or instruction fetch as this is a unified cache.",
        "MetricGroup": "Miss_Ratio;L2_Cache_Effectiveness",
        "ScaleUnit": "1per cache access"
    },
    {
	"MetricName": "l1i_cache_read_miss_rate",
	"MetricExpr": "L1I_CACHE_LMISS / L1I_CACHE",
	"BriefDescription": "L1I cache read miss rate",
	"MetricGroup": "Cache",
        "ScaleUnit": "1per cache access"
    },
    {
	"MetricName": "l2d_cache_read_miss_rate",
	"MetricExpr": "L2D_CACHE_LMISS_RD / L2D_CACHE_RD",
	"BriefDescription": "L2 cache read miss rate",
	"MetricGroup": "Cache",
        "ScaleUnit": "1per cache read access"
    },
    {
	"MetricName": "l1d_cache_miss_mpki",
	"MetricExpr": "(L1D_CACHE_LMISS_RD * 1e3) / INST_RETIRED",
	"BriefDescription": "Misses per thousand instructions (data)",
	"MetricGroup": "Cache",
        "ScaleUnit": "1MPKI"
    },
    {
	"MetricName": "l1i_cache_miss_mpki",
	"MetricExpr": "(L1I_CACHE_LMISS * 1e3) / INST_RETIRED",
	"BriefDescription": "Misses per thousand instructions (instruction)",
	"MetricGroup": "Cache",
        "ScaleUnit": "1MPKI"
    },
    {
        "MetricName": "simd_percentage",
        "MetricExpr": "((ASE_SPEC / INST_SPEC) * 100)",
        "BriefDescription": "This metric measures advanced SIMD operations as a percentage of total operations speculatively executed.",
        "MetricGroup": "Operation_Mix",
        "ScaleUnit": "1percent of operations"
    },
    {
        "MetricName": "crypto_percentage",
        "MetricExpr": "((CRYPTO_SPEC / INST_SPEC) * 100)",
        "BriefDescription": "This metric measures crypto operations as a percentage of operations speculatively executed.",
        "MetricGroup": "Operation_Mix",
        "ScaleUnit": "1percent of operations"
    },
    {
	"MetricName": "gflops",
	"MetricExpr": "VFP_SPEC / (duration_time * 1e9)",
	"BriefDescription": "Giga-floating point operations per second",
	"MetricGroup": "InstructionMix"
    },
    {
        "MetricName": "integer_dp_percentage",
        "MetricExpr": "((DP_SPEC / INST_SPEC) * 100)",
        "BriefDescription": "This metric measures scalar integer operations as a percentage of operations speculatively executed.",
        "MetricGroup": "Operation_Mix",
        "ScaleUnit": "1percent of operations"
    },
    {
        "MetricName": "ipc",
        "MetricExpr": "(INST_RETIRED / CPU_CYCLES)",
        "BriefDescription": "This metric measures the number of instructions retired per cycle.",
        "MetricGroup": "General",
        "ScaleUnit": "1per cycle"
    },
    {
        "MetricName": "load_percentage",
        "MetricExpr": "((LD_SPEC / INST_SPEC) * 100)",
        "BriefDescription": "This metric measures load operations as a percentage of operations speculatively executed.",
        "MetricGroup": "Operation_Mix",
        "ScaleUnit": "1percent of operations"
    },
    {
	"MetricName": "load_store_spec_rate",
	"MetricExpr": "((LDST_SPEC / INST_SPEC) * 100)",
	"BriefDescription": "The rate of load or store instructions speculatively executed to overall instructions speclatively executed",
        "MetricGroup": "Operation_Mix",
        "ScaleUnit": "1percent of operations"
    },
    {
	"MetricName": "retired_mips",
	"MetricExpr": "INST_RETIRED / (duration_time * 1e6)",
	"BriefDescription": "Millions of instructions per second",
	"MetricGroup": "InstructionMix"
    },
    {
	"MetricName": "spec_utilization_mips",
	"MetricExpr": "INST_SPEC / (duration_time * 1e6)",
	"BriefDescription": "Millions of instructions per second",
	"MetricGroup": "PEutilization"
    },
    {
	"MetricName": "pc_write_spec_rate",
	"MetricExpr": "((PC_WRITE_SPEC / INST_SPEC) * 100)",
	"BriefDescription": "The rate of software change of the PC speculatively executed to overall instructions speclatively executed",
        "MetricGroup": "Operation_Mix",
        "ScaleUnit": "1percent of operations"
    },
    {
        "MetricName": "store_percentage",
        "MetricExpr": "((ST_SPEC / INST_SPEC) * 100)",
        "BriefDescription": "This metric measures store operations as a percentage of operations speculatively executed.",
        "MetricGroup": "Operation_Mix",
        "ScaleUnit": "1percent of operations"
    },
    {
        "MetricName": "scalar_fp_percentage",
        "MetricExpr": "((VFP_SPEC / INST_SPEC) * 100)",
        "BriefDescription": "This metric measures scalar floating point operations as a percentage of operations speculatively executed.",
        "MetricGroup": "Operation_Mix",
        "ScaleUnit": "1percent of operations"
    },
    {
        "MetricName": "retired_rate",
        "MetricExpr": "OP_RETIRED / OP_SPEC",
        "BriefDescription": "Of all the micro-operations issued, what percentage are retired(committed)",
        "MetricGroup": "General",
        "ScaleUnit": "100%"
    },
    {
	"MetricName": "wasted",
	"MetricExpr": "1 - (OP_RETIRED / (CPU_CYCLES * #slots))",
        "BriefDescription": "Of all the micro-operations issued, what proportion are lost",
	"MetricGroup": "General",
	"ScaleUnit": "100%"
    },
    {
        "MetricName": "wasted_rate",
        "MetricExpr": "1 - OP_RETIRED / OP_SPEC",
        "BriefDescription": "Of all the micro-operations issued, what percentage are not retired(committed)",
        "MetricGroup": "General",
        "ScaleUnit": "100%"
    },
    {
	"MetricName": "stall_backend_cache_rate",
	"MetricExpr": "((STALL_BACKEND_CACHE / CPU_CYCLES) * 100)",
	"BriefDescription": "Proportion of cycles stalled and no operations issued to backend and cache miss",
	"MetricGroup": "Stall",
        "ScaleUnit": "1percent of cycles"
    },
    {
	"MetricName": "stall_backend_resource_rate",
	"MetricExpr": "((STALL_BACKEND_RESOURCE / CPU_CYCLES) * 100)",
	"BriefDescription": "Proportion of cycles stalled and no operations issued to backend and resource full",
	"MetricGroup": "Stall",
        "ScaleUnit": "1percent of cycles"
    },
    {
	"MetricName": "stall_backend_tlb_rate",
	"MetricExpr": "((STALL_BACKEND_TLB / CPU_CYCLES) * 100)",
	"BriefDescription": "Proportion of cycles stalled and no operations issued to backend and TLB miss",
	"MetricGroup": "Stall",
        "ScaleUnit": "1percent of cycles"
    },
    {
	"MetricName": "stall_frontend_cache_rate",
	"MetricExpr": "((STALL_FRONTEND_CACHE / CPU_CYCLES) * 100)",
	"BriefDescription": "Proportion of cycles stalled and no ops delivered from frontend and cache miss",
	"MetricGroup": "Stall",
        "ScaleUnit": "1percent of cycles"
    },
    {
	"MetricName": "stall_frontend_tlb_rate",
	"MetricExpr": "((STALL_FRONTEND_TLB / CPU_CYCLES) * 100)",
	"BriefDescription": "Proportion of cycles stalled and no ops delivered from frontend and TLB miss",
	"MetricGroup": "Stall",
        "ScaleUnit": "1percent of cycles"
    },
    {
        "MetricName": "dtlb_walk_ratio",
        "MetricExpr": "(DTLB_WALK / L1D_TLB)",
        "BriefDescription": "This metric measures the ratio of data TLB Walks to the total number of data TLB accesses. This gives an indication of the effectiveness of the data TLB accesses.",
        "MetricGroup": "Miss_Ratio;DTLB_Effectiveness",
        "ScaleUnit": "1per TLB access"
    },
    {
        "MetricName": "itlb_walk_ratio",
        "MetricExpr": "(ITLB_WALK / L1I_TLB)",
        "BriefDescription": "This metric measures the ratio of instruction TLB Walks to the total number of instruction TLB accesses. This gives an indication of the effectiveness of the instruction TLB accesses.",
        "MetricGroup": "Miss_Ratio;ITLB_Effectiveness",
        "ScaleUnit": "1per TLB access"
    },
    {
        "ArchStdEvent": "backend_bound"
    },
    {
        "ArchStdEvent": "frontend_bound",
        "MetricExpr": "100 - (retired_fraction + slots_lost_misspeculation_fraction + backend_bound)"
    },
    {
        "MetricName": "slots_lost_misspeculation_fraction",
        "MetricExpr": "100 * ((OP_SPEC - OP_RETIRED) / (CPU_CYCLES * #slots))",
        "BriefDescription": "Fraction of slots lost due to misspeculation",
        "MetricGroup": "Default;TopdownL1",
        "ScaleUnit": "1percent of slots"
    },
    {
        "MetricName": "retired_fraction",
        "MetricExpr": "100 * (OP_RETIRED / (CPU_CYCLES * #slots))",
        "BriefDescription": "Fraction of slots retiring, useful work",
        "MetricGroup": "Default;TopdownL1",
	"ScaleUnit": "1percent of slots"
    },
    {
        "MetricName": "backend_core",
        "MetricExpr": "(backend_bound / 100) - backend_memory",
        "BriefDescription": "Fraction of slots the CPU was stalled due to backend non-memory subsystem issues",
        "MetricGroup": "TopdownL2",
        "ScaleUnit": "100%"
    },
    {
        "MetricName": "backend_memory",
        "MetricExpr": "(STALL_BACKEND_TLB + STALL_BACKEND_CACHE) / CPU_CYCLES",
        "BriefDescription": "Fraction of slots the CPU was stalled due to backend memory subsystem issues (cache/tlb miss)",
        "MetricGroup": "TopdownL2",
        "ScaleUnit": "100%"
    },
    {
        "MetricName": "branch_mispredict",
        "MetricExpr": "(BR_MIS_PRED_RETIRED / GPC_FLUSH) * slots_lost_misspeculation_fraction",
        "BriefDescription": "Fraction of slots lost due to branch misprediciton",
        "MetricGroup": "TopdownL2",
        "ScaleUnit": "1percent of slots"
    },
    {
        "MetricName": "frontend_bandwidth",
        "MetricExpr": "frontend_bound - frontend_latency",
        "BriefDescription": "Fraction of slots the CPU did not dispatch at full bandwidth - able to dispatch partial slots only (1, 2, or 3 uops)",
        "MetricGroup": "TopdownL2",
        "ScaleUnit": "1percent of slots"
    },
    {
        "MetricName": "frontend_latency",
        "MetricExpr": "((STALL_FRONTEND - ((STALL_SLOT_FRONTEND - ((frontend_bound / 100) * CPU_CYCLES * #slots)) / #slots)) / CPU_CYCLES) * 100",
        "BriefDescription": "Fraction of slots the CPU was stalled due to frontend latency issues (cache/tlb miss); nothing to dispatch",
        "MetricGroup": "TopdownL2",
        "ScaleUnit": "1percent of slots"
    },
    {
        "MetricName": "other_miss_pred",
        "MetricExpr": "slots_lost_misspeculation_fraction - branch_mispredict",
        "BriefDescription": "Fraction of slots lost due to other/non-branch misprediction misspeculation",
        "MetricGroup": "TopdownL2",
        "ScaleUnit": "1percent of slots"
    },
    {
        "MetricName": "pipe_utilization",
        "MetricExpr": "100 * ((IXU_NUM_UOPS_ISSUED + FSU_ISSUED) / (CPU_CYCLES * 6))",
        "BriefDescription": "Fraction of execute slots utilized",
        "MetricGroup": "TopdownL2",
        "ScaleUnit": "1percent of slots"
    },
    {
        "MetricName": "d_cache_l2_miss_rate",
        "MetricExpr": "((STALL_BACKEND_MEM / CPU_CYCLES) * 100)",
        "BriefDescription": "Fraction of cycles the CPU was stalled due to data L2 cache miss",
        "MetricGroup": "TopdownL3",
        "ScaleUnit": "1percent of cycles"
    },
    {
        "MetricName": "d_cache_miss_rate",
        "MetricExpr": "((STALL_BACKEND_CACHE / CPU_CYCLES) * 100)",
        "BriefDescription": "Fraction of cycles the CPU was stalled due to data cache miss",
        "MetricGroup": "TopdownL3",
        "ScaleUnit": "1percent of cycles"
    },
    {
        "MetricName": "d_tlb_miss_rate",
        "MetricExpr": "((STALL_BACKEND_TLB / CPU_CYCLES) * 100)",
        "BriefDescription": "Fraction of cycles the CPU was stalled due to data TLB miss",
        "MetricGroup": "TopdownL3",
        "ScaleUnit": "1percent of cycles"
    },
    {
        "MetricName": "fsu_pipe_utilization",
        "MetricExpr": "((FSU_ISSUED / (CPU_CYCLES * 2)) * 100)",
        "BriefDescription": "Fraction of FSU execute slots utilized",
        "MetricGroup": "TopdownL3",
        "ScaleUnit": "1percent of slots"
    },
    {
        "MetricName": "i_cache_miss_rate",
        "MetricExpr": "((STALL_FRONTEND_CACHE / CPU_CYCLES) * 100)",
        "BriefDescription": "Fraction of cycles the CPU was stalled due to instruction cache miss",
        "MetricGroup": "TopdownL3",
        "ScaleUnit": "1percent of slots"
    },
    {
        "MetricName": "i_tlb_miss_rate",
        "MetricExpr": "((STALL_FRONTEND_TLB / CPU_CYCLES) * 100)",
        "BriefDescription": "Fraction of cycles the CPU was stalled due to instruction TLB miss",
        "MetricGroup": "TopdownL3",
        "ScaleUnit": "1percent of slots"
    },
    {
        "MetricName": "ixu_pipe_utilization",
        "MetricExpr": "((IXU_NUM_UOPS_ISSUED / (CPU_CYCLES * #slots)) * 100)",
        "BriefDescription": "Fraction of IXU execute slots utilized",
        "MetricGroup": "TopdownL3",
        "ScaleUnit": "1percent of slots"
    },
    {
        "MetricName": "stall_recovery_rate",
        "MetricExpr": "((IDR_STALL_FLUSH / CPU_CYCLES) * 100)",
        "BriefDescription": "Fraction of cycles the CPU was stalled due to flush recovery",
        "MetricGroup": "TopdownL3",
        "ScaleUnit": "1percent of slots"
    },
    {
        "MetricName": "stall_fsu_sched_rate",
        "MetricExpr": "((IDR_STALL_FSU_SCHED / CPU_CYCLES) * 100)",
        "BriefDescription": "Fraction of cycles the CPU was stalled and FSU was full",
        "MetricGroup": "TopdownL4",
        "ScaleUnit": "1percent of cycles"
    },
    {
        "MetricName": "stall_ixu_sched_rate",
        "MetricExpr": "((IDR_STALL_IXU_SCHED / CPU_CYCLES) * 100)",
        "BriefDescription": "Fraction of cycles the CPU was stalled and IXU was full",
        "MetricGroup": "TopdownL4",
        "ScaleUnit": "1percent of cycles"
    },
    {
        "MetricName": "stall_lob_id_rate",
        "MetricExpr": "((IDR_STALL_LOB_ID / CPU_CYCLES) * 100)",
        "BriefDescription": "Fraction of cycles the CPU was stalled and LOB was full",
        "MetricGroup": "TopdownL4",
        "ScaleUnit": "1percent of cycles"
    },
    {
        "MetricName": "stall_rob_id_rate",
        "MetricExpr": "((IDR_STALL_ROB_ID / CPU_CYCLES) * 100)",
        "BriefDescription": "Fraction of cycles the CPU was stalled and ROB was full",
        "MetricGroup": "TopdownL4",
        "ScaleUnit": "1percent of cycles"
    },
    {
        "MetricName": "stall_sob_id_rate",
        "MetricExpr": "((IDR_STALL_SOB_ID / CPU_CYCLES) * 100)",
        "BriefDescription": "Fraction of cycles the CPU was stalled and SOB was full",
        "MetricGroup": "TopdownL4",
        "ScaleUnit": "1percent of cycles"
    }
]