tools/perf/pmu-events/arch/x86/skylake/frontend.json

   1 [
   2     {
   3         "EventCode": "0x80",
   4         "Counter": "0,1,2,3",
   5         "UMask": "0x4",
   6         "EventName": "ICACHE_16B.IFDATA_STALL",
   7         "SampleAfterValue": "2000003",
   8         "BriefDescription": "Cycles where a code fetch is stalled due to L1 instruction cache miss.",
   9         "CounterHTOff": "0,1,2,3,4,5,6,7"
  10     },
  11     {
  12         "EventCode": "0x83",
  13         "Counter": "0,1,2,3",
  14         "UMask": "0x1",
  15         "EventName": "ICACHE_64B.IFTAG_HIT",
  16         "SampleAfterValue": "200003",
  17         "BriefDescription": "Instruction fetch tag lookups that hit in the instruction cache (L1I). Counts at 64-byte cache-line granularity.",
  18         "CounterHTOff": "0,1,2,3,4,5,6,7"
  19     },
  20     {
  21         "EventCode": "0x83",
  22         "Counter": "0,1,2,3",
  23         "UMask": "0x2",
  24         "EventName": "ICACHE_64B.IFTAG_MISS",
  25         "SampleAfterValue": "200003",
  26         "BriefDescription": "Instruction fetch tag lookups that miss in the instruction cache (L1I). Counts at 64-byte cache-line granularity.",
  27         "CounterHTOff": "0,1,2,3,4,5,6,7"
  28     },
  29     {
  30         "EventCode": "0x83",
  31         "Counter": "0,1,2,3",
  32         "UMask": "0x4",
  33         "EventName": "ICACHE_64B.IFTAG_STALL",
  34         "SampleAfterValue": "200003",
  35         "BriefDescription": "Cycles where a code fetch is stalled due to L1 instruction cache tag miss.",
  36         "CounterHTOff": "0,1,2,3,4,5,6,7"
  37     },
  38     {
  39         "PublicDescription": "This event counts the number of uops delivered to Instruction Decode Queue (IDQ) from the MITE path. Counting includes uops that may 'bypass' the IDQ. This also means that uops are not being delivered from the Decode Stream Buffer (DSB).",
  40         "EventCode": "0x79",
  41         "Counter": "0,1,2,3",
  42         "UMask": "0x4",
  43         "EventName": "IDQ.MITE_UOPS",
  44         "SampleAfterValue": "2000003",
  45         "BriefDescription": "Uops delivered to Instruction Decode Queue (IDQ) from MITE path",
  46         "CounterHTOff": "0,1,2,3,4,5,6,7"
  47     },
  48     {
  49         "PublicDescription": "This event counts the number of uops delivered to Instruction Decode Queue (IDQ) from the Decode Stream Buffer (DSB) path. Counting includes uops that may 'bypass' the IDQ.",
  50         "EventCode": "0x79",
  51         "Counter": "0,1,2,3",
  52         "UMask": "0x8",
  53         "EventName": "IDQ.DSB_UOPS",
  54         "SampleAfterValue": "2000003",
  55         "BriefDescription": "Uops delivered to Instruction Decode Queue (IDQ) from the Decode Stream Buffer (DSB) path",
  56         "CounterHTOff": "0,1,2,3,4,5,6,7"
  57     },
  58     {
  59         "PublicDescription": "This event counts the number of uops initiated by MITE and delivered to Instruction Decode Queue (IDQ) while the Microcode Sequenser (MS) is busy. Counting includes uops that may 'bypass' the IDQ.",
  60         "EventCode": "0x79",
  61         "Counter": "0,1,2,3",
  62         "UMask": "0x20",
  63         "EventName": "IDQ.MS_MITE_UOPS",
  64         "SampleAfterValue": "2000003",
  65         "BriefDescription": "Uops initiated by MITE and delivered to Instruction Decode Queue (IDQ) while Microcode Sequenser (MS) is busy",
  66         "CounterHTOff": "0,1,2,3,4,5,6,7"
  67     },
  68     {
  69         "PublicDescription": "This event counts cycles during which uops are being delivered to Instruction Decode Queue (IDQ) while the Microcode Sequenser (MS) is busy. Counting includes uops that may 'bypass' the IDQ. Uops maybe initiated by Decode Stream Buffer (DSB) or MITE.",
  70         "EventCode": "0x79",
  71         "Counter": "0,1,2,3",
  72         "UMask": "0x30",
  73         "EventName": "IDQ.MS_CYCLES",
  74         "SampleAfterValue": "2000003",
  75         "BriefDescription": "Cycles when uops are being delivered to Instruction Decode Queue (IDQ) while Microcode Sequenser (MS) is busy",
  76         "CounterMask": "1",
  77         "CounterHTOff": "0,1,2,3,4,5,6,7"
  78     },
  79     {
  80         "PublicDescription": "This event counts cycles during which uops are being delivered to Instruction Decode Queue (IDQ) from the MITE path. Counting includes uops that may 'bypass' the IDQ.",
  81         "EventCode": "0x79",
  82         "Counter": "0,1,2,3",
  83         "UMask": "0x4",
  84         "EventName": "IDQ.MITE_CYCLES",
  85         "SampleAfterValue": "2000003",
  86         "BriefDescription": "Cycles when uops are being delivered to Instruction Decode Queue (IDQ) from MITE path",
  87         "CounterMask": "1",
  88         "CounterHTOff": "0,1,2,3,4,5,6,7"
  89     },
  90     {
  91         "PublicDescription": "This event counts cycles during which uops are being delivered to Instruction Decode Queue (IDQ) from the Decode Stream Buffer (DSB) path. Counting includes uops that may 'bypass' the IDQ.",
  92         "EventCode": "0x79",
  93         "Counter": "0,1,2,3",
  94         "UMask": "0x8",
  95         "EventName": "IDQ.DSB_CYCLES",
  96         "SampleAfterValue": "2000003",
  97         "BriefDescription": "Cycles when uops are being delivered to Instruction Decode Queue (IDQ) from Decode Stream Buffer (DSB) path",
  98         "CounterMask": "1",
  99         "CounterHTOff": "0,1,2,3,4,5,6,7"
 100     },
 101     {
 102         "PublicDescription": "This event counts cycles during which uops initiated by Decode Stream Buffer (DSB) are being delivered to Instruction Decode Queue (IDQ) while the Microcode Sequencer (MS) is busy. Counting includes uops that may 'bypass' the IDQ.",
 103         "EventCode": "0x79",
 104         "Counter": "0,1,2,3",
 105         "UMask": "0x10",
 106         "EventName": "IDQ.MS_DSB_CYCLES",
 107         "SampleAfterValue": "2000003",
 108         "BriefDescription": "Cycles when uops initiated by Decode Stream Buffer (DSB) are being delivered to Instruction Decode Queue (IDQ) while Microcode Sequenser (MS) is busy",
 109         "CounterMask": "1",
 110         "CounterHTOff": "0,1,2,3,4,5,6,7"
 111     },
 112     {
 113         "PublicDescription": "This event counts the number of cycles 4  uops were  delivered to Instruction Decode Queue (IDQ) from the Decode Stream Buffer (DSB) path. Counting includes uops that may 'bypass' the IDQ.",
 114         "EventCode": "0x79",
 115         "Counter": "0,1,2,3",
 116         "UMask": "0x18",
 117         "EventName": "IDQ.ALL_DSB_CYCLES_4_UOPS",
 118         "SampleAfterValue": "2000003",
 119         "BriefDescription": "Cycles Decode Stream Buffer (DSB) is delivering 4 Uops",
 120         "CounterMask": "4",
 121         "CounterHTOff": "0,1,2,3,4,5,6,7"
 122     },
 123     {
 124         "PublicDescription": "This event counts the number of cycles  uops were  delivered to Instruction Decode Queue (IDQ) from the Decode Stream Buffer (DSB) path. Counting includes uops that may 'bypass' the IDQ.",
 125         "EventCode": "0x79",
 126         "Counter": "0,1,2,3",
 127         "UMask": "0x18",
 128         "EventName": "IDQ.ALL_DSB_CYCLES_ANY_UOPS",
 129         "SampleAfterValue": "2000003",
 130         "BriefDescription": "Cycles Decode Stream Buffer (DSB) is delivering any Uop",
 131         "CounterMask": "1",
 132         "CounterHTOff": "0,1,2,3,4,5,6,7"
 133     },
 134     {
 135         "PublicDescription": "This event counts the number of cycles 4  uops were  delivered to Instruction Decode Queue (IDQ) from the MITE path. Counting includes uops that may 'bypass' the IDQ. This also means that uops are not being delivered from the Decode Stream Buffer (DSB).",
 136         "EventCode": "0x79",
 137         "Counter": "0,1,2,3",
 138         "UMask": "0x24",
 139         "EventName": "IDQ.ALL_MITE_CYCLES_4_UOPS",
 140         "SampleAfterValue": "2000003",
 141         "BriefDescription": "Cycles MITE is delivering 4 Uops",
 142         "CounterMask": "4",
 143         "CounterHTOff": "0,1,2,3,4,5,6,7"
 144     },
 145     {
 146         "PublicDescription": "This event counts the number of cycles  uops were delivered to Instruction Decode Queue (IDQ) from the MITE path. Counting includes uops that may 'bypass' the IDQ. This also means that uops are not being delivered from the Decode Stream Buffer (DSB).",
 147         "EventCode": "0x79",
 148         "Counter": "0,1,2,3",
 149         "UMask": "0x24",
 150         "EventName": "IDQ.ALL_MITE_CYCLES_ANY_UOPS",
 151         "SampleAfterValue": "2000003",
 152         "BriefDescription": "Cycles MITE is delivering any Uop",
 153         "CounterMask": "1",
 154         "CounterHTOff": "0,1,2,3,4,5,6,7"
 155     },
 156     {
 157         "PublicDescription": "This event counts the number of uops not delivered to Resource Allocation Table (RAT) per thread adding ?4 ? x? when Resource Allocation Table (RAT) is not stalled and Instruction Decode Queue (IDQ) delivers x uops to Resource Allocation Table (RAT) (where x belongs to {0,1,2,3}). Counting does not cover cases when:\n a. IDQ-Resource Allocation Table (RAT) pipe serves the other thread\n\n b. Resource Allocation Table (RAT) is stalled for the thread (including uop drops and clear BE conditions)\n \n c. Instruction Decode Queue (IDQ) delivers four uops.",
 158         "EventCode": "0x9C",
 159         "Counter": "0,1,2,3",
 160         "UMask": "0x1",
 161         "EventName": "IDQ_UOPS_NOT_DELIVERED.CORE",
 162         "SampleAfterValue": "2000003",
 163         "BriefDescription": "Uops not delivered to Resource Allocation Table (RAT) per thread when backend of the machine is not stalled",
 164         "CounterHTOff": "0,1,2,3,4,5,6,7"
 165     },
 166     {
 167         "PublicDescription": "This event counts, on the per-thread basis, cycles when no uops are delivered to Resource Allocation Table (RAT). IDQ_Uops_Not_Delivered.core =4.",
 168         "EventCode": "0x9C",
 169         "Counter": "0,1,2,3",
 170         "UMask": "0x1",
 171         "EventName": "IDQ_UOPS_NOT_DELIVERED.CYCLES_0_UOPS_DELIV.CORE",
 172         "SampleAfterValue": "2000003",
 173         "BriefDescription": "Cycles per thread when 4 or more uops are not delivered to Resource Allocation Table (RAT) when backend of the machine is not stalled",
 174         "CounterMask": "4",
 175         "CounterHTOff": "0,1,2,3,4,5,6,7"
 176     },
 177     {
 178         "PublicDescription": "This event counts, on the per-thread basis, cycles when less than 1 uop is  delivered to Resource Allocation Table (RAT). IDQ_Uops_Not_Delivered.core >=3.",
 179         "EventCode": "0x9C",
 180         "Counter": "0,1,2,3",
 181         "UMask": "0x1",
 182         "EventName": "IDQ_UOPS_NOT_DELIVERED.CYCLES_LE_1_UOP_DELIV.CORE",
 183         "SampleAfterValue": "2000003",
 184         "BriefDescription": "Cycles per thread when 3 or more uops are not delivered to Resource Allocation Table (RAT) when backend of the machine is not stalled",
 185         "CounterMask": "3",
 186         "CounterHTOff": "0,1,2,3,4,5,6,7"
 187     },
 188     {
 189         "EventCode": "0x9C",
 190         "Counter": "0,1,2,3",
 191         "UMask": "0x1",
 192         "EventName": "IDQ_UOPS_NOT_DELIVERED.CYCLES_LE_2_UOP_DELIV.CORE",
 193         "SampleAfterValue": "2000003",
 194         "BriefDescription": "Cycles with less than 2 uops delivered by the front end.",
 195         "CounterMask": "2",
 196         "CounterHTOff": "0,1,2,3,4,5,6,7"
 197     },
 198     {
 199         "EventCode": "0x9C",
 200         "Counter": "0,1,2,3",
 201         "UMask": "0x1",
 202         "EventName": "IDQ_UOPS_NOT_DELIVERED.CYCLES_LE_3_UOP_DELIV.CORE",
 203         "SampleAfterValue": "2000003",
 204         "BriefDescription": "Cycles with less than 3 uops delivered by the front end.",
 205         "CounterMask": "1",
 206         "CounterHTOff": "0,1,2,3,4,5,6,7"
 207     },
 208     {
 209         "EventCode": "0x9C",
 210         "Invert": "1",
 211         "Counter": "0,1,2,3",
 212         "UMask": "0x1",
 213         "EventName": "IDQ_UOPS_NOT_DELIVERED.CYCLES_FE_WAS_OK",
 214         "SampleAfterValue": "2000003",
 215         "BriefDescription": "Counts cycles FE delivered 4 uops or Resource Allocation Table (RAT) was stalling FE.",
 216         "CounterMask": "1",
 217         "CounterHTOff": "0,1,2,3,4,5,6,7"
 218     },
 219     {
 220         "PublicDescription": "This event counts Decode Stream Buffer (DSB)-to-MITE switch true penalty cycles. These cycles do not include uops routed through because of the switch itself, for example, when Instruction Decode Queue (IDQ) pre-allocation is unavailable, or Instruction Decode Queue (IDQ) is full. SBD-to-MITE switch true penalty cycles happen after the merge mux (MM) receives Decode Stream Buffer (DSB) Sync-indication until receiving the first MITE uop. \nMM is placed before Instruction Decode Queue (IDQ) to merge uops being fed from the MITE and Decode Stream Buffer (DSB) paths. Decode Stream Buffer (DSB) inserts the Sync-indication whenever a Decode Stream Buffer (DSB)-to-MITE switch occurs.\nPenalty: A Decode Stream Buffer (DSB) hit followed by a Decode Stream Buffer (DSB) miss can cost up to six cycles in which no uops are delivered to the IDQ. Most often, such switches from the Decode Stream Buffer (DSB) to the legacy pipeline cost 0?2 cycles.",
 221         "EventCode": "0xAB",
 222         "Counter": "0,1,2,3",
 223         "UMask": "0x2",
 224         "EventName": "DSB2MITE_SWITCHES.PENALTY_CYCLES",
 225         "SampleAfterValue": "2000003",
 226         "BriefDescription": "Decode Stream Buffer (DSB)-to-MITE switch true penalty cycles.",
 227         "CounterHTOff": "0,1,2,3,4,5,6,7"
 228     },
 229     {
 230         "PEBS": "1",
 231         "EventCode": "0xC6",
 232         "MSRValue": "0x11",
 233         "Counter": "0,1,2,3",
 234         "UMask": "0x1",
 235         "EventName": "FRONTEND_RETIRED.DSB_MISS",
 236         "MSRIndex": "0x3F7",
 237         "SampleAfterValue": "100007",
 238         "BriefDescription": "Retired Instructions who experienced decode stream buffer (DSB - the decoded instruction-cache) miss.",
 239         "TakenAlone": "1",
 240         "CounterHTOff": "0,1,2,3"
 241     },
 242     {
 243         "PEBS": "1",
 244         "EventCode": "0xC6",
 245         "MSRValue": "0x12",
 246         "Counter": "0,1,2,3",
 247         "UMask": "0x1",
 248         "EventName": "FRONTEND_RETIRED.L1I_MISS",
 249         "MSRIndex": "0x3F7",
 250         "SampleAfterValue": "100007",
 251         "BriefDescription": "Retired Instructions who experienced Instruction L1 Cache true miss.",
 252         "TakenAlone": "1",
 253         "CounterHTOff": "0,1,2,3"
 254     },
 255     {
 256         "PEBS": "1",
 257         "EventCode": "0xC6",
 258         "MSRValue": "0x13",
 259         "Counter": "0,1,2,3",
 260         "UMask": "0x1",
 261         "EventName": "FRONTEND_RETIRED.L2_MISS",
 262         "MSRIndex": "0x3F7",
 263         "SampleAfterValue": "100007",
 264         "BriefDescription": "Retired Instructions who experienced Instruction L2 Cache true miss.",
 265         "TakenAlone": "1",
 266         "CounterHTOff": "0,1,2,3"
 267     },
 268     {
 269         "PEBS": "1",
 270         "EventCode": "0xC6",
 271         "MSRValue": "0x14",
 272         "Counter": "0,1,2,3",
 273         "UMask": "0x1",
 274         "EventName": "FRONTEND_RETIRED.ITLB_MISS",
 275         "MSRIndex": "0x3F7",
 276         "SampleAfterValue": "100007",
 277         "BriefDescription": "Retired Instructions who experienced iTLB true miss.",
 278         "TakenAlone": "1",
 279         "CounterHTOff": "0,1,2,3"
 280     },
 281     {
 282         "PEBS": "1",
 283         "EventCode": "0xC6",
 284         "MSRValue": "0x15",
 285         "Counter": "0,1,2,3",
 286         "UMask": "0x1",
 287         "EventName": "FRONTEND_RETIRED.STLB_MISS",
 288         "MSRIndex": "0x3F7",
 289         "SampleAfterValue": "100007",
 290         "BriefDescription": "Retired Instructions who experienced STLB (2nd level TLB) true miss.",
 291         "TakenAlone": "1",
 292         "CounterHTOff": "0,1,2,3"
 293     },
 294     {
 295         "PEBS": "1",
 296         "EventCode": "0xC6",
 297         "MSRValue": "0x400206",
 298         "Counter": "0,1,2,3",
 299         "UMask": "0x1",
 300         "EventName": "FRONTEND_RETIRED.LATENCY_GE_2",
 301         "MSRIndex": "0x3F7",
 302         "SampleAfterValue": "100007",
 303         "BriefDescription": "Retired instructions that are fetched after an interval where the front-end delivered no uops for a period of 2 cycles which was not interrupted by a back-end stall.",
 304         "TakenAlone": "1",
 305         "CounterHTOff": "0,1,2,3"
 306     },
 307     {
 308         "PEBS": "1",
 309         "EventCode": "0xC6",
 310         "MSRValue": "0x200206",
 311         "Counter": "0,1,2,3",
 312         "UMask": "0x1",
 313         "EventName": "FRONTEND_RETIRED.LATENCY_GE_2_BUBBLES_GE_2",
 314         "MSRIndex": "0x3F7",
 315         "SampleAfterValue": "100007",
 316         "BriefDescription": "Retired instructions that are fetched after an interval where the front-end had at least 2 bubble-slots for a period of 2 cycles which was not interrupted by a back-end stall.",
 317         "TakenAlone": "1",
 318         "CounterHTOff": "0,1,2,3"
 319     },
 320     {
 321         "PEBS": "1",
 322         "EventCode": "0xC6",
 323         "MSRValue": "0x400406",
 324         "Counter": "0,1,2,3",
 325         "UMask": "0x1",
 326         "EventName": "FRONTEND_RETIRED.LATENCY_GE_4",
 327         "MSRIndex": "0x3F7",
 328         "SampleAfterValue": "100007",
 329         "BriefDescription": "Retired instructions that are fetched after an interval where the front-end delivered no uops for a period of 4 cycles which was not interrupted by a back-end stall.",
 330         "TakenAlone": "1",
 331         "CounterHTOff": "0,1,2,3"
 332     },
 333     {
 334         "PublicDescription": "Number of switches from DSB (Decode Stream Buffer) or MITE (legacy decode pipeline) to the Microcode Sequencer.",
 335         "EventCode": "0x79",
 336         "Counter": "0,1,2,3",
 337         "UMask": "0x30",
 338         "EdgeDetect": "1",
 339         "EventName": "IDQ.MS_SWITCHES",
 340         "SampleAfterValue": "2000003",
 341         "BriefDescription": "Number of switches from DSB (Decode Stream Buffer) or MITE (legacy decode pipeline) to the Microcode Sequencer",
 342         "CounterMask": "1",
 343         "CounterHTOff": "0,1,2,3,4,5,6,7"
 344     },
 345     {
 346         "PublicDescription": "This event counts the total number of uops delivered to Instruction Decode Queue (IDQ) while the Microcode Sequenser (MS) is busy. Counting includes uops that may 'bypass' the IDQ. Uops maybe initiated by Decode Stream Buffer (DSB) or MITE.",
 347         "EventCode": "0x79",
 348         "Counter": "0,1,2,3",
 349         "UMask": "0x30",
 350         "EventName": "IDQ.MS_UOPS",
 351         "SampleAfterValue": "2000003",
 352         "BriefDescription": "Uops delivered to Instruction Decode Queue (IDQ) while Microcode Sequenser (MS) is busy",
 353         "CounterHTOff": "0,1,2,3,4,5,6,7"
 354     },
 355     {
 356         "PEBS": "1",
 357         "EventCode": "0xC6",
 358         "MSRValue": "0x400806",
 359         "Counter": "0,1,2,3",
 360         "UMask": "0x1",
 361         "EventName": "FRONTEND_RETIRED.LATENCY_GE_8",
 362         "MSRIndex": "0x3F7",
 363         "SampleAfterValue": "100007",
 364         "BriefDescription": "Retired instructions that are fetched after an interval where the front-end delivered no uops for a period of 8 cycles which was not interrupted by a back-end stall.",
 365         "TakenAlone": "1",
 366         "CounterHTOff": "0,1,2,3"
 367     },
 368     {
 369         "PEBS": "1",
 370         "EventCode": "0xC6",
 371         "MSRValue": "0x401006",
 372         "Counter": "0,1,2,3",
 373         "UMask": "0x1",
 374         "EventName": "FRONTEND_RETIRED.LATENCY_GE_16",
 375         "MSRIndex": "0x3F7",
 376         "SampleAfterValue": "100007",
 377         "BriefDescription": "Retired instructions that are fetched after an interval where the front-end delivered no uops for a period of 16 cycles which was not interrupted by a back-end stall.",
 378         "TakenAlone": "1",
 379         "CounterHTOff": "0,1,2,3"
 380     },
 381     {
 382         "PEBS": "1",
 383         "EventCode": "0xC6",
 384         "MSRValue": "0x402006",
 385         "Counter": "0,1,2,3",
 386         "UMask": "0x1",
 387         "EventName": "FRONTEND_RETIRED.LATENCY_GE_32",
 388         "MSRIndex": "0x3F7",
 389         "SampleAfterValue": "100007",
 390         "BriefDescription": "Retired instructions that are fetched after an interval where the front-end delivered no uops for a period of 32 cycles which was not interrupted by a back-end stall.",
 391         "TakenAlone": "1",
 392         "CounterHTOff": "0,1,2,3"
 393     },
 394     {
 395         "PEBS": "1",
 396         "EventCode": "0xC6",
 397         "MSRValue": "0x404006",
 398         "Counter": "0,1,2,3",
 399         "UMask": "0x1",
 400         "EventName": "FRONTEND_RETIRED.LATENCY_GE_64",
 401         "MSRIndex": "0x3F7",
 402         "SampleAfterValue": "100007",
 403         "BriefDescription": "Retired instructions that are fetched after an interval where the front-end delivered no uops for a period of 64 cycles which was not interrupted by a back-end stall.",
 404         "TakenAlone": "1",
 405         "CounterHTOff": "0,1,2,3"
 406     },
 407     {
 408         "PEBS": "1",
 409         "EventCode": "0xC6",
 410         "MSRValue": "0x408006",
 411         "Counter": "0,1,2,3",
 412         "UMask": "0x1",
 413         "EventName": "FRONTEND_RETIRED.LATENCY_GE_128",
 414         "MSRIndex": "0x3F7",
 415         "SampleAfterValue": "100007",
 416         "BriefDescription": "Retired instructions that are fetched after an interval where the front-end delivered no uops for a period of 128 cycles which was not interrupted by a back-end stall.",
 417         "TakenAlone": "1",
 418         "CounterHTOff": "0,1,2,3"
 419     },
 420     {
 421         "PEBS": "1",
 422         "EventCode": "0xC6",
 423         "MSRValue": "0x410006",
 424         "Counter": "0,1,2,3",
 425         "UMask": "0x1",
 426         "EventName": "FRONTEND_RETIRED.LATENCY_GE_256",
 427         "MSRIndex": "0x3F7",
 428         "SampleAfterValue": "100007",
 429         "BriefDescription": "Retired instructions that are fetched after an interval where the front-end delivered no uops for a period of 256 cycles which was not interrupted by a back-end stall.",
 430         "TakenAlone": "1",
 431         "CounterHTOff": "0,1,2,3"
 432     },
 433     {
 434         "PEBS": "1",
 435         "EventCode": "0xC6",
 436         "MSRValue": "0x420006",
 437         "Counter": "0,1,2,3",
 438         "UMask": "0x1",
 439         "EventName": "FRONTEND_RETIRED.LATENCY_GE_512",
 440         "MSRIndex": "0x3F7",
 441         "SampleAfterValue": "100007",
 442         "BriefDescription": "Retired instructions that are fetched after an interval where the front-end delivered no uops for a period of 512 cycles which was not interrupted by a back-end stall.",
 443         "TakenAlone": "1",
 444         "CounterHTOff": "0,1,2,3"
 445     },
 446     {
 447         "PEBS": "1",
 448         "EventCode": "0xC6",
 449         "MSRValue": "0x100206",
 450         "Counter": "0,1,2,3",
 451         "UMask": "0x1",
 452         "EventName": "FRONTEND_RETIRED.LATENCY_GE_2_BUBBLES_GE_1",
 453         "MSRIndex": "0x3F7",
 454         "SampleAfterValue": "100007",
 455         "BriefDescription": "Retired instructions that are fetched after an interval where the front-end had at least 1 bubble-slot for a period of 2 cycles which was not interrupted by a back-end stall.",
 456         "TakenAlone": "1",
 457         "CounterHTOff": "0,1,2,3"
 458     },
 459     {
 460         "PEBS": "1",
 461         "EventCode": "0xC6",
 462         "MSRValue": "0x300206",
 463         "Counter": "0,1,2,3",
 464         "UMask": "0x1",
 465         "EventName": "FRONTEND_RETIRED.LATENCY_GE_2_BUBBLES_GE_3",
 466         "MSRIndex": "0x3F7",
 467         "SampleAfterValue": "100007",
 468         "BriefDescription": "Retired instructions that are fetched after an interval where the front-end had at least 3 bubble-slots for a period of 2 cycles which was not interrupted by a back-end stall.",
 469         "TakenAlone": "1",
 470         "CounterHTOff": "0,1,2,3"
 471     }
 472 ]