x86/tigerlake/tgl-metrics.json

4         "MetricExpr": "cstate_pkg@c10\\-residency@ / TSC",
11         "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
18         "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
25         "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
32         "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
39         "MetricExpr": "cstate_core@c7\\-residency@ / TSC",
46         "MetricExpr": "cstate_pkg@c7\\-residency@ / TSC",
53         "MetricExpr": "cstate_pkg@c8\\-residency@ / TSC",
60         "MetricExpr": "cstate_pkg@c9\\-residency@ / TSC",
73         "MetricExpr": "((msr@aperf@ - cycles) / msr@aperf@ if msr@smi@ > 0 else 0)",
87 …"BriefDescription": "This metric estimates how often memory load accesses were aliased by precedin…
93 …memory load accesses were aliased by preceding stores (in program order) with a 4K address offset.…
110 …er-cases for operations that cannot be handled natively by the execution pipeline. For example; wh…
116 …"MetricExpr": "topdown\\-be\\-bound / (topdown\\-fe\\-bound + topdown\\-bad\\-spec + topdown\\-ret…
121 …-of-order scheduler dispatches ready uops into their respective execution units; and once complete…
127         "MetricExpr": "max(1 - (tma_frontend_bound + tma_backend_bound + tma_retiring), 0)",
132 …-pipeline was blocked due to recovery from earlier incorrect speculation. For example; wasted work…
150 …etched from an incorrectly speculated program path; or stalls when the out-of-order part of the ma…
159 … corrected path; following all sorts of miss-predicted branches. For example; branchy code with lo…
164         "MetricExpr": "max(0, tma_microcode_sequencer - tma_assists)",
168 … as in the case of read-modify-write as an example. Since these instructions require multiple uops…
173 …"MetricExpr": "(1 - BR_MISP_RETIRED.ALL_BRANCHES / (BR_MISP_RETIRED.ALL_BRANCHES + MACHINE_CLEARS.…
181 …"BriefDescription": "This metric estimates fraction of cycles while the memory subsystem was handl…
187 …"PublicDescription": "This metric estimates fraction of cycles while the memory subsystem was hand…
191 …"BriefDescription": "This metric represents fraction of slots where Core non-memory issues were of…
192         "MetricExpr": "max(0, tma_backend_bound - tma_memory_bound)",
197 …-memory issues were of a bottleneck.  Shortage in hardware compute resources; or dependencies in s…
201 … metric estimates fraction of cycles while the memory subsystem was handling synchronizations due …
203 …MEM_LOAD_L3_HIT_RETIRED.XSNP_NO_FWD + MEM_LOAD_L3_HIT_RETIRED.XSNP_FWD * (1 - OCR.DEMAND_DATA_RD.L…
207 … metric estimates fraction of cycles while the memory subsystem was handling synchronizations due …
211 …"BriefDescription": "This metric represents fraction of cycles where decoder-0 was the only active…
212 …"MetricExpr": "(cpu@INST_DECODED.DECODERS\\,cmask\\=1@ - cpu@INST_DECODED.DECODERS\\,cmask\\=2@) /…
216 …"PublicDescription": "This metric represents fraction of cycles where decoder-0 was the only activ…
229 …his metric estimates how often the CPU was stalled on accesses to external memory (DRAM) by loads",
231 …o_thread_clks + (CYCLE_ACTIVITY.STALLS_L1D_MISS - CYCLE_ACTIVITY.STALLS_L2_MISS) / tma_info_thread…
235 …s metric estimates how often the CPU was stalled on accesses to external memory (DRAM) by loads. B…
240         "MetricExpr": "(IDQ.DSB_CYCLES_ANY - IDQ.DSB_CYCLES_OK) / tma_info_core_core_clks / 2",
253 …-cache) is a Uop Cache where the front-end directly delivers Uops (micro operations) avoiding heav…
258 …SSES.STLB_HIT\\,cmask\\=1@ + DTLB_LOAD_MISSES.WALK_ACTIVE, max(CYCLE_ACTIVITY.CYCLES_MEM_ANY - CYC…
262 …-aside Buffers) are processor caches for recently used entries out of the Page Tables that are use…
266 …: "This metric roughly estimates the fraction of cycles spent handling first-level data TLB store …
271 …-level data TLB store misses.  As with ordinary data caching; focus on improving data locality and…
280 …hreading hiccup; where multiple Logical Processors contend on different data-elements mapped into …
284 … of how often L1D Fill Buffer unavailability limited additional L1D miss memory access requests to…
289 …memory access requests to proceed. The higher the metric value; the deeper the memory hierarchy le…
293 …": "This metric represents fraction of slots the CPU was stalled due to Frontend bandwidth issues",
294         "MetricExpr": "max(0, tma_frontend_bound - tma_fetch_latency)",
299 …bandwidth issues.  For example; inefficiencies at the instruction decoders; or restrictions for ca…
304 …"MetricExpr": "(5 * IDQ_UOPS_NOT_DELIVERED.CYCLES_0_UOPS_DELIV.CORE - INT_MISC.UOP_DROPPING) / tma…
309 …he CPU was stalled due to Frontend latency issues.  For example; instruction-cache misses; iTLB mi…
314         "MetricExpr": "tma_heavy_operations - tma_microcode_sequencer",
318 …t are decoder into two or up to ([SNB+] four; [ADL+] five) uops. This highly-correlates with the n…
322 …"BriefDescription": "This metric represents overall arithmetic floating-point (FP) operations frac…
327 …-point (FP) operations fraction the CPU has executed (retired). Note this metric's value may excee…
336 …ts. FP Assist may apply when working with very small floating point values (so-called Denormals).",
340 …"BriefDescription": "This metric approximates arithmetic floating-point (FP) scalar uops fraction …
345 …"PublicDescription": "This metric approximates arithmetic floating-point (FP) scalar uops fraction…
349 …"BriefDescription": "This metric approximates arithmetic floating-point (FP) vector uops fraction …
354 …"PublicDescription": "This metric approximates arithmetic floating-point (FP) vector uops fraction…
358 …tric approximates arithmetic FP vector uops fraction the CPU has retired for 128-bit wide vectors",
363 … approximates arithmetic FP vector uops fraction the CPU has retired for 128-bit wide vectors. May…
367 …tric approximates arithmetic FP vector uops fraction the CPU has retired for 256-bit wide vectors",
372 … approximates arithmetic FP vector uops fraction the CPU has retired for 256-bit wide vectors. May…
376 …tric approximates arithmetic FP vector uops fraction the CPU has retired for 512-bit wide vectors",
381 … approximates arithmetic FP vector uops fraction the CPU has retired for 512-bit wide vectors. May…
387 …"MetricExpr": "topdown\\-fe\\-bound / (topdown\\-fe\\-bound + topdown\\-bad\\-spec + topdown\\-ret…
392 …-lines are fetched from the memory subsystem; parsed into instructions; and lastly decoded into mi…
396 … slots where the CPU was retiring heavy-weight operations -- instructions that require two or more…
397 …"MetricExpr": "tma_microcode_sequencer + tma_retiring * (UOPS_DECODED.DEC0 - cpu@UOPS_DECODED.DEC0…
402 …he CPU was retiring heavy-weight operations -- instructions that require two or more uops or micro…
415 …"BriefDescription": "Branch Misprediction Cost: Fraction of TMA slots wasted per non-speculative b…
420 …"PublicDescription": "Branch Misprediction Cost: Fraction of TMA slots wasted per non-speculative …
423 …"BriefDescription": "Instructions per retired mispredicts for conditional non-taken branches (lowe…
451 …"BriefDescription": "Number of Instructions per non-speculative Branch Misprediction (JEClear) (lo…
464 …      "BriefDescription": "Probability of Core Bound bottleneck hidden by SMT-profiling artifacts",
466 …"MetricExpr": "(100 * (1 - tma_core_bound / tma_ports_utilization if tma_core_bound < tma_ports_ut…
472 …"BriefDescription": "Total pipeline cost of DSB (uop cache) hits - subset of the Instruction_Fetch…
477 …"PublicDescription": "Total pipeline cost of DSB (uop cache) hits - subset of the Instruction_Fetc…
480 …"BriefDescription": "Total pipeline cost of DSB (uop cache) misses - subset of the Instruction_Fet…
486 …"PublicDescription": "Total pipeline cost of DSB (uop cache) misses - subset of the Instruction_Fe…
489 …"BriefDescription": "Total pipeline cost of Instruction Cache misses - subset of the Big_Code Bott…
495 …"PublicDescription": "Total pipeline cost of Instruction Cache misses - subset of the Big_Code Bot…
498 …of instruction fetch related bottlenecks by large code footprint programs (i-side cache; TLB and B…
506 …"BriefDescription": "Total pipeline cost of instructions used for program control-flow - a subset …
511 …"PublicDescription": "Total pipeline cost of instructions used for program control-flow - a subset…
514 …"BriefDescription": "Total pipeline cost of external Memory- or Cache-Bandwidth related bottleneck…
519 …"PublicDescription": "Total pipeline cost of external Memory- or Cache-Bandwidth related bottlenec…
522 …"BriefDescription": "Total pipeline cost of external Memory- or Cache-Latency related bottlenecks",
527 …"PublicDescription": "Total pipeline cost of external Memory- or Cache-Latency related bottlenecks…
530 …     "BriefDescription": "Total pipeline cost when the execution is compute-bound - an estimation",
535 …ine cost when the execution is compute-bound - an estimation. Covers Core Bound when High ILP as w…
538 …cost of instruction fetch bandwidth related bottlenecks (when the front-end could not sustain oper…
540 …- (1 - 10 * tma_microcode_sequencer * tma_other_mispredicts / tma_branch_mispredicts) * tma_fetch_…
551 …"PublicDescription": "Total pipeline cost of irregular execution (e.g. FP-assists in HPC, Wait tim…
554 …"BriefDescription": "Total pipeline cost of Memory Address Translation related bottlenecks (data-s…
556 …ma_l1_bound / max(tma_memory_bound, tma_dram_bound + tma_l1_bound + tma_l2_bound + tma_l3_bound + …
560 …"PublicDescription": "Total pipeline cost of Memory Address Translation related bottlenecks (data-…
563 …"BriefDescription": "Total pipeline cost of Memory Synchronization related bottlenecks (data trans…
564 …t_stores + tma_store_latency + tma_streaming_stores - tma_store_latency)) + tma_machine_clears * (…
568 …"PublicDescription": "Total pipeline cost of Memory Synchronization related bottlenecks (data tran…
573 …"MetricExpr": "100 * (1 - 10 * tma_microcode_sequencer * tma_other_mispredicts / tma_branch_mispre…
580         "BriefDescription": "Total pipeline cost of remaining bottlenecks in the back-end",
581 …"MetricExpr": "100 - (tma_info_bottleneck_big_code + tma_info_bottleneck_instruction_fetch_bw + tm…
585 …aining bottlenecks in the back-end. Examples include data-dependencies (Core Bound when Low ILP) a…
588 …"BriefDescription": "Total pipeline cost of \"useful operations\" - the portion of Retiring catego…
589 … "100 * (tma_retiring - (BR_INST_RETIRED.ALL_BRANCHES + 2 * BR_INST_RETIRED.NEAR_CALL + INST_RETIR…
601         "BriefDescription": "Fraction of branches that are non-taken conditionals",
614 …"MetricExpr": "(BR_INST_RETIRED.NEAR_TAKEN - BR_INST_RETIRED.COND_TAKEN - 2 * BR_INST_RETIRED.NEAR…
620 …"MetricExpr": "1 - (tma_info_branches_cond_nt + tma_info_branches_cond_tk + tma_info_branches_call…
631         "BriefDescription": "Instructions Per Cycle across hyper-threads (per physical core)",
649 …BriefDescription": "Actual per-core usage of the Floating Point non-X87 execution units (regardles…
653 …-core usage of the Floating Point non-X87 execution units (regardless of precision or vector-width…
656 …efDescription": "Instruction-Level-Parallelism (average number of uops executed when there is exec…
670 …tion": "Average number of cycles of a switch from the DSB fetch-unit to MITE fetch unit - see DSB_…
676         "BriefDescription": "Average number of Uops issued by front-end when it issued something",
688 …"BriefDescription": "Instructions per non-speculative DSB miss (lower number means higher occurren…
740 …"BriefDescription": "Instructions per FP Arithmetic AVX/SSE 128-bit instruction (lower number mean…
745 …"PublicDescription": "Instructions per FP Arithmetic AVX/SSE 128-bit instruction (lower number mea…
748 …"BriefDescription": "Instructions per FP Arithmetic AVX* 256-bit instruction (lower number means h…
753 …"PublicDescription": "Instructions per FP Arithmetic AVX* 256-bit instruction (lower number means …
756 …"BriefDescription": "Instructions per FP Arithmetic AVX 512-bit instruction (lower number means hi…
761 …"PublicDescription": "Instructions per FP Arithmetic AVX 512-bit instruction (lower number means h…
764 …"BriefDescription": "Instructions per FP Arithmetic Scalar Double-Precision instruction (lower num…
769 …"PublicDescription": "Instructions per FP Arithmetic Scalar Double-Precision instruction (lower nu…
772 …"BriefDescription": "Instructions per FP Arithmetic Scalar Single-Precision instruction (lower num…
777 …"PublicDescription": "Instructions per FP Arithmetic Scalar Single-Precision instruction (lower nu…
836         "BriefDescription": "Average per-core data fill bandwidth to the L1 data cache [GB / sec]",
842         "BriefDescription": "Average per-core data fill bandwidth to the L2 cache [GB / sec]",
848         "BriefDescription": "Average per-core data access bandwidth to the L3 cache [GB / sec]",
854         "BriefDescription": "Average per-core data fill bandwidth to the L3 cache [GB / sec]",
860 … instructions for retired demand loads (L1D misses that merge into ongoing miss-handling entries)",
866 …      "BriefDescription": "Average per-thread data fill bandwidth to the L1 data cache [GB / sec]",
884         "BriefDescription": "Average per-thread data fill bandwidth to the L2 cache [GB / sec]",
891         "MetricExpr": "1e3 * (L2_RQSTS.REFERENCES - L2_RQSTS.MISS) / INST_RETIRED.ANY",
926         "BriefDescription": "Average per-thread data access bandwidth to the L3 cache [GB / sec]",
932         "BriefDescription": "Average per-thread data fill bandwidth to the L3 cache [GB / sec]",
968 …"BriefDescription": "Actual Average Latency for L1 data-cache miss demand load operations (in core…
980         "BriefDescription": "Un-cacheable retired load per kilo instruction",
986 …"BriefDescription": "Memory-Level-Parallelism (average number of L1 miss demand load when there is…
990 …"PublicDescription": "Memory-Level-Parallelism (average number of L1 miss demand load when there i…
993 … level TLB) code speculative misses per kilo instruction (misses of any page-size that complete th…
999 …l TLB) data load speculative misses per kilo instruction (misses of any page-size that complete th…
1012 … TLB) data store speculative misses per kilo instruction (misses of any page-size that complete th…
1018 …"BriefDescription": "Instruction-Level-Parallelism (average number of uops executed when there is …
1074         "BriefDescription": "Average external Memory Bandwidth Use for reads and writes [GB / sec]",
1078 …"PublicDescription": "Average external Memory Bandwidth Use for reads and writes [GB / sec]. Relat…
1085 …egate across all supported options of: FP precisions, scalar and vector instructions, vector-width"
1108         "BriefDescription": "Average number of parallel data read requests to external memory",
1112 …"PublicDescription": "Average number of parallel data read requests to external memory. Accounts f…
1115 …    "BriefDescription": "Average latency of data read request to external memory (in nanoseconds)",
1119 …of data read request to external memory (in nanoseconds). Accounts for demand loads and L1/L2 pref…
1122 …"BriefDescription": "Fraction of Core cycles where the core was running with power-delivery for ba…
1126 …s running with power-delivery for baseline license level 0.  This includes non-AVX codes, SSE, AVX…
1129 …"BriefDescription": "Fraction of Core cycles where the core was running with power-delivery for li…
1134 … running with power-delivery for license level 1.  This includes high current AVX 256-bit instruct…
1137 …"BriefDescription": "Fraction of Core cycles where the core was running with power-delivery for li…
1142 …e the core was running with power-delivery for license level 2 (introduced in SKX).  This includes…
1146 …"MetricExpr": "(1 - CPU_CLK_UNHALTED.ONE_THREAD_ACTIVE / CPU_CLK_UNHALTED.REF_DISTRIBUTED if #SMT_…
1163 …   "BriefDescription": "Per-Logical Processor actual clocks when the Logical Processor is active.",
1175         "BriefDescription": "The ratio of Executed- by Issued-Uops",
1179 …"PublicDescription": "The ratio of Executed- by Issued-Uops. Ratio > 1 suggests high rate of uop m…
1188 …"BriefDescription": "Total issue-pipeline slots (per-Physical Core till ICL; per-Logical Processor…
1194 …    "BriefDescription": "Fraction of Physical Core issue-slots utilized by this Logical Processor",
1224 …"MetricExpr": "max((CYCLE_ACTIVITY.STALLS_MEM_ANY - CYCLE_ACTIVITY.STALLS_L1D_MISS) / tma_info_thr…
1228 … TLB. These cases are characterized by execution unit stalls; while some non-completed demand load…
1233 …EM_INST_RETIRED.ALL_LOADS - MEM_LOAD_RETIRED.FB_HIT - MEM_LOAD_RETIRED.L1_MISS) * 20 / 100, max(CY…
1237 …che. The short latency of the L1 data cache may be exposed in pointer-chasing memory access patter…
1243 …1_MISS) + L1D_PEND_MISS.FB_FULL_PERIODS) * ((CYCLE_ACTIVITY.STALLS_L1D_MISS - CYCLE_ACTIVITY.STALL…
1253 …"MetricExpr": "(CYCLE_ACTIVITY.STALLS_L2_MISS - CYCLE_ACTIVITY.STALLS_L3_MISS) / tma_info_thread_c…
1279 …slots where the CPU was retiring light-weight operations -- instructions that require no more than…
1280         "MetricExpr": "max(0, tma_retiring - tma_heavy_operations)",
1285 …-weight operations -- instructions that require no more than one uop (micro-operation). This corre…
1298 … the (first level) DTLB was missed by load accesses, that later on hit in second-level TLB (STLB)",
1299         "MetricExpr": "tma_dtlb_load - tma_load_stlb_miss",
1306 …"BriefDescription": "This metric estimates the fraction of cycles where the Second-level TLB (STLB…
1316 …"MetricExpr": "(16 * max(0, MEM_INST_RETIRED.LOCK_LOADS - L2_RQSTS.ALL_RFO) + MEM_INST_RETIRED.LOC…
1320 …re handling of locks; they are classified as L1_Bound regardless of what memory source satisfied t…
1325         "MetricExpr": "(LSD.CYCLES_ACTIVE - LSD.CYCLES_OK) / tma_info_core_core_clks / 2",
1329 …ly does well sustaining Uop supply. However; in some rare cases; optimal uop-delivery could not be…
1334         "MetricExpr": "max(0, tma_bad_speculation - tma_branch_mispredicts)",
1339 …-of-order portion of the machine needs to recover its state after the clear. For example; this can…
1343 …re's performance was likely hurt due to approaching bandwidth limits of external memory - DRAM ([S…
1348 …bandwidth limits of external memory - DRAM ([SPR-HBM] and/or HBM).  The underlying heuristic assum…
1352 …here the performance was likely hurt due to latency from external memory - DRAM ([SPR-HBM] and/or …
1353 …EAD, OFFCORE_REQUESTS_OUTSTANDING.CYCLES_WITH_DATA_RD) / tma_info_thread_clks - tma_mem_bandwidth",
1357 …here the performance was likely hurt due to latency from external memory - DRAM ([SPR-HBM] and/or …
1361 …"BriefDescription": "This metric represents fraction of slots the Memory subsystem within the Back…
1367 …Memory subsystem within the Backend was a bottleneck.  Memory Bound estimates fraction of slots wh…
1371 …c represents fraction of slots where the CPU was retiring memory operations -- uops for memory loa…
1399         "MetricExpr": "(IDQ.MITE_CYCLES_ANY - IDQ.MITE_CYCLES_OK) / tma_info_core_core_clks / 2",
1403 …re-cached in the DSB or LSD. For example; inefficiencies due to asymmetric decoders; use of long i…
1408 …"MetricExpr": "(cpu@IDQ.MITE_UOPS\\,cmask\\=4@ - cpu@IDQ.MITE_UOPS\\,cmask\\=5@) / tma_info_thread…
1415 …n terms of percentage of([SKL+] injected blend uops out of all Uops Issued -- the Count Domain; [A…
1420 …n terms of percentage of([SKL+] injected blend uops out of all Uops Issued -- the Count Domain; [A…
1429 … Commonly used instructions are optimized for delivery by the DSB (decoded i-cache) or MITE (legac…
1438 …o op) instructions. Compilers often use NOPs for certain address alignments - e.g. start address o…
1442 …is metric represents the remaining light uops fraction the CPU has executed - remaining means not …
1444 …"MetricExpr": "max(0, tma_light_operations - (tma_fp_arith + tma_memory_operations + tma_branch_in…
1448 …is metric represents the remaining light uops fraction the CPU has executed - remaining means not …
1452 …action of slots the CPU was stalled due to other cases of misprediction (non-retired x86 branches …
1453 …"MetricExpr": "max(tma_branch_mispredicts * (1 - BR_MISP_RETIRED.ALL_BRANCHES / (INT_MISC.CLEARS_C…
1460 …raction of slots the CPU has wasted due to Nukes (Machine Clears) not related to memory ordering.",
1461 …"MetricExpr": "max(tma_machine_clears * (1 - MACHINE_CLEARS.MEMORY_ORDERING / MACHINE_CLEARS.COUNT…
1504 … the CPU performance was potentially limited due to Core computation issues (non divider-related)",
1505 … tma_info_thread_clks if ARITH.DIVIDER_ACTIVE < CYCLE_ACTIVITY.STALLS_TOTAL - CYCLE_ACTIVITY.STALL…
1509 …-related).  Two distinct categories can be attributed into this metric: (1) heavy data-dependency …
1518 …t (Logical Processor cycles since ICL, Physical Core cycles otherwise). Long-latency instructions …
1527 …-dependency among software instructions; or over oversubscribing a particular hardware resource. I…
1536 …cal Core cycles otherwise).  Loop Vectorization -most compilers feature auto-Vectorization options…
1551 …"MetricExpr": "topdown\\-retiring / (topdown\\-fe\\-bound + topdown\\-bad\\-spec + topdown\\-retir…
1556 …ions-per-cycle (see IPC metric). Note that a high Retiring value does not necessary mean there is …
1560 …"BriefDescription": "This metric represents fraction of cycles the CPU issue-pipeline was stalled …
1565 …ycles the CPU issue-pipeline was stalled due to serializing operations. Instructions like CPUID; W…
1578 … "This metric estimates fraction of cycles handling memory load split accesses - load that cross 6…
1583 … "This metric estimates fraction of cycles handling memory load split accesses - load that cross 6…
1593 …resents rate of split store accesses.  Consider aligning your data to the 64-byte cache line granu…
1597 …f cycles where the Super Queue (SQ) was full taking into account all request-types and both hardwa…
1602 …f cycles where the Super Queue (SQ) was full taking into account all request-types and both hardwa…
1606 …estimates how often CPU was stalled  due to RFO store memory accesses; RFO store issue a read-for-…
1611 …O store memory accesses; RFO store issue a read-for-ownership request before the write. Even thoug…
1615 …"BriefDescription": "This metric roughly estimates fraction of cycles when the memory subsystem ha…
1621 …memory subsystem had loads blocked since they could not forward data from earlier (in program orde…
1626 …"MetricExpr": "(L2_RQSTS.RFO_HIT * 10 * (1 - MEM_INST_RETIRED.LOCK_LOADS / MEM_INST_RETIRED.ALL_ST…
1630 …-of-order core performance; however; holding resources for longer time can lead into undesired imp…
1643 …tion of cycles where the TLB was missed by store accesses, hitting in the second-level TLB (STLB)",
1644         "MetricExpr": "tma_dtlb_store - tma_store_stlb_miss",
1659 …"This metric estimates how often CPU was stalled  due to Streaming store memory accesses; Streamin…
1664 …tore memory accesses; Streaming store optimize out a read request required by RFO stores. Even tho…
1687         "MetricExpr": "(max(cycles\\-t - cycles\\-ct, 0) / cycles if has_event(cycles\\-t) else 0)",
1694         "MetricExpr": "(cycles\\-t / el\\-start if has_event(el\\-start) else 0)",
1701         "MetricExpr": "(cycles\\-t / tx\\-start if has_event(cycles\\-t) else 0)",
1708         "MetricExpr": "(cycles\\-t / cycles if has_event(cycles\\-t) else 0)",