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libpmc: add support for Intel N100/N150 #1911

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31fccb3
libpmc: import alderlaken metrics
leahneukirchen Dec 1, 2025
9b2cfea
libpmc: define Intel N100/N150 to be alderlaken
leahneukirchen Dec 1, 2025
8074411
hwpmc: detect Intel N100/N150 as alderlake
leahneukirchen Dec 1, 2025
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604 changes: 604 additions & 0 deletions lib/libpmc/pmu-events/arch/x86/alderlaken/adln-metrics.json
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638 changes: 638 additions & 0 deletions lib/libpmc/pmu-events/arch/x86/alderlaken/cache.json
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35 changes: 35 additions & 0 deletions lib/libpmc/pmu-events/arch/x86/alderlaken/floating-point.json
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[
{
"BriefDescription": "Counts the number of cycles the floating point divider is in the loop stage.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xcd",
"EventName": "ARITH.FPDIV_ACTIVE",
"SampleAfterValue": "1000003",
"UMask": "0x2"
},
{
"BriefDescription": "Counts the number of floating point divider uops executed per cycle.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xcd",
"EventName": "ARITH.FPDIV_UOPS",
"SampleAfterValue": "1000003",
"UMask": "0x8"
},
{
"BriefDescription": "Counts the number of floating point operations retired that required microcode assist.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xc3",
"EventName": "MACHINE_CLEARS.FP_ASSIST",
"PublicDescription": "Counts the number of floating point operations retired that required microcode assist, which is not a reflection of the number of FP operations, instructions or uops.",
"SampleAfterValue": "20003",
"UMask": "0x4"
},
{
"BriefDescription": "Counts the number of floating point divide uops retired (x87 and SSE, including x87 sqrt).",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xc2",
"EventName": "UOPS_RETIRED.FPDIV",
"SampleAfterValue": "2000003",
"UMask": "0x8"
}
]
29 changes: 29 additions & 0 deletions lib/libpmc/pmu-events/arch/x86/alderlaken/frontend.json
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[
{
"BriefDescription": "Counts the total number of BACLEARS due to all branch types including conditional and unconditional jumps, returns, and indirect branches.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xe6",
"EventName": "BACLEARS.ANY",
"PublicDescription": "Counts the total number of BACLEARS, which occur when the Branch Target Buffer (BTB) prediction or lack thereof, was corrected by a later branch predictor in the frontend. Includes BACLEARS due to all branch types including conditional and unconditional jumps, returns, and indirect branches.",
"SampleAfterValue": "100003",
"UMask": "0x1"
},
{
"BriefDescription": "Counts the number of requests to the instruction cache for one or more bytes of a cache line.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0x80",
"EventName": "ICACHE.ACCESSES",
"PublicDescription": "Counts the total number of requests to the instruction cache. The event only counts new cache line accesses, so that multiple back to back fetches to the exact same cache line or byte chunk count as one. Specifically, the event counts when accesses from sequential code crosses the cache line boundary, or when a branch target is moved to a new line or to a non-sequential byte chunk of the same line.",
"SampleAfterValue": "200003",
"UMask": "0x3"
},
{
"BriefDescription": "Counts the number of instruction cache misses.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0x80",
"EventName": "ICACHE.MISSES",
"PublicDescription": "Counts the number of missed requests to the instruction cache. The event only counts new cache line accesses, so that multiple back to back fetches to the exact same cache line and byte chunk count as one. Specifically, the event counts when accesses from sequential code crosses the cache line boundary, or when a branch target is moved to a new line or to a non-sequential byte chunk of the same line.",
"SampleAfterValue": "200003",
"UMask": "0x2"
}
]
169 changes: 169 additions & 0 deletions lib/libpmc/pmu-events/arch/x86/alderlaken/memory.json
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[
{
"BriefDescription": "Counts the number of cycles that the head (oldest load) of the load buffer is stalled due to any number of reasons, including an L1 miss, WCB full, pagewalk, store address block or store data block, on a load that retires.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0x05",
"EventName": "LD_HEAD.ANY_AT_RET",
"SampleAfterValue": "1000003",
"UMask": "0xff"
},
{
"BriefDescription": "Counts the number of cycles that the head (oldest load) of the load buffer is stalled due to a core bound stall including a store address match, a DTLB miss or a page walk that detains the load from retiring.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0x05",
"EventName": "LD_HEAD.L1_BOUND_AT_RET",
"SampleAfterValue": "1000003",
"UMask": "0xf4"
},
{
"BriefDescription": "Counts the number of cycles that the head (oldest load) of the load buffer and retirement are both stalled due to a DL1 miss.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0x05",
"EventName": "LD_HEAD.L1_MISS_AT_RET",
"SampleAfterValue": "1000003",
"UMask": "0x81"
},
{
"BriefDescription": "Counts the number of cycles that the head (oldest load) of the load buffer and retirement are both stalled due to other block cases.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0x05",
"EventName": "LD_HEAD.OTHER_AT_RET",
"PublicDescription": "Counts the number of cycles that the head (oldest load) of the load buffer and retirement are both stalled due to other block cases such as pipeline conflicts, fences, etc.",
"SampleAfterValue": "1000003",
"UMask": "0xc0"
},
{
"BriefDescription": "Counts the number of cycles that the head (oldest load) of the load buffer and retirement are both stalled due to a pagewalk.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0x05",
"EventName": "LD_HEAD.PGWALK_AT_RET",
"SampleAfterValue": "1000003",
"UMask": "0xa0"
},
{
"BriefDescription": "Counts the number of cycles that the head (oldest load) of the load buffer and retirement are both stalled due to a store address match.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0x05",
"EventName": "LD_HEAD.ST_ADDR_AT_RET",
"SampleAfterValue": "1000003",
"UMask": "0x84"
},
{
"BriefDescription": "Counts the number of machine clears due to memory ordering caused by a snoop from an external agent. Does not count internally generated machine clears such as those due to memory disambiguation.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xc3",
"EventName": "MACHINE_CLEARS.MEMORY_ORDERING",
"SampleAfterValue": "20003",
"UMask": "0x2"
},
{
"BriefDescription": "Counts demand instruction fetches and L1 instruction cache prefetches that were supplied by DRAM.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xB7",
"EventName": "OCR.DEMAND_CODE_RD.DRAM",
"MSRIndex": "0x1a6,0x1a7",
"MSRValue": "0x784000004",
"PublicDescription": "Counts demand instruction fetches and L1 instruction cache prefetches that were supplied by DRAM. Available PDIST counters: 0",
"SampleAfterValue": "100003",
"UMask": "0x1"
},
{
"BriefDescription": "Counts demand instruction fetches and L1 instruction cache prefetches that were not supplied by the L3 cache.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xB7",
"EventName": "OCR.DEMAND_CODE_RD.L3_MISS",
"MSRIndex": "0x1a6,0x1a7",
"MSRValue": "0x3F84400004",
"PublicDescription": "Counts demand instruction fetches and L1 instruction cache prefetches that were not supplied by the L3 cache. Available PDIST counters: 0",
"SampleAfterValue": "100003",
"UMask": "0x1"
},
{
"BriefDescription": "Counts demand data reads that were supplied by DRAM.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xB7",
"EventName": "OCR.DEMAND_DATA_RD.DRAM",
"MSRIndex": "0x1a6,0x1a7",
"MSRValue": "0x784000001",
"PublicDescription": "Counts demand data reads that were supplied by DRAM. Available PDIST counters: 0",
"SampleAfterValue": "100003",
"UMask": "0x1"
},
{
"BriefDescription": "Counts demand data reads that were not supplied by the L3 cache.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xB7",
"EventName": "OCR.DEMAND_DATA_RD.L3_MISS",
"MSRIndex": "0x1a6,0x1a7",
"MSRValue": "0x3F84400001",
"PublicDescription": "Counts demand data reads that were not supplied by the L3 cache. Available PDIST counters: 0",
"SampleAfterValue": "100003",
"UMask": "0x1"
},
{
"BriefDescription": "Counts demand data reads that were not supplied by the L3 cache. [L3_MISS_LOCAL is alias to L3_MISS]",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xB7",
"EventName": "OCR.DEMAND_DATA_RD.L3_MISS_LOCAL",
"MSRIndex": "0x1a6,0x1a7",
"MSRValue": "0x3F84400001",
"PublicDescription": "Counts demand data reads that were not supplied by the L3 cache. [L3_MISS_LOCAL is alias to L3_MISS] Available PDIST counters: 0",
"SampleAfterValue": "100003",
"UMask": "0x1"
},
{
"BriefDescription": "Counts demand reads for ownership (RFO) and software prefetches for exclusive ownership (PREFETCHW) that were supplied by DRAM.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xB7",
"EventName": "OCR.DEMAND_RFO.DRAM",
"MSRIndex": "0x1a6,0x1a7",
"MSRValue": "0x784000002",
"PublicDescription": "Counts demand reads for ownership (RFO) and software prefetches for exclusive ownership (PREFETCHW) that were supplied by DRAM. Available PDIST counters: 0",
"SampleAfterValue": "100003",
"UMask": "0x1"
},
{
"BriefDescription": "Counts demand reads for ownership (RFO) and software prefetches for exclusive ownership (PREFETCHW) that were not supplied by the L3 cache.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xB7",
"EventName": "OCR.DEMAND_RFO.L3_MISS",
"MSRIndex": "0x1a6,0x1a7",
"MSRValue": "0x3F84400002",
"PublicDescription": "Counts demand reads for ownership (RFO) and software prefetches for exclusive ownership (PREFETCHW) that were not supplied by the L3 cache. Available PDIST counters: 0",
"SampleAfterValue": "100003",
"UMask": "0x1"
},
{
"BriefDescription": "Counts demand reads for ownership (RFO) and software prefetches for exclusive ownership (PREFETCHW) that were not supplied by the L3 cache. [L3_MISS_LOCAL is alias to L3_MISS]",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xB7",
"EventName": "OCR.DEMAND_RFO.L3_MISS_LOCAL",
"MSRIndex": "0x1a6,0x1a7",
"MSRValue": "0x3F84400002",
"PublicDescription": "Counts demand reads for ownership (RFO) and software prefetches for exclusive ownership (PREFETCHW) that were not supplied by the L3 cache. [L3_MISS_LOCAL is alias to L3_MISS] Available PDIST counters: 0",
"SampleAfterValue": "100003",
"UMask": "0x1"
},
{
"BriefDescription": "Counts L1 data cache software prefetches which include T0/T1/T2 and NTA (except PREFETCHW) that were supplied by DRAM.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xB7",
"EventName": "OCR.SWPF_RD.DRAM",
"MSRIndex": "0x1a6,0x1a7",
"MSRValue": "0x784004000",
"PublicDescription": "Counts L1 data cache software prefetches which include T0/T1/T2 and NTA (except PREFETCHW) that were supplied by DRAM. Available PDIST counters: 0",
"SampleAfterValue": "100003",
"UMask": "0x1"
},
{
"BriefDescription": "Counts L1 data cache software prefetches which include T0/T1/T2 and NTA (except PREFETCHW) that were not supplied by the L3 cache.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xB7",
"EventName": "OCR.SWPF_RD.L3_MISS",
"MSRIndex": "0x1a6,0x1a7",
"MSRValue": "0x3F84404000",
"PublicDescription": "Counts L1 data cache software prefetches which include T0/T1/T2 and NTA (except PREFETCHW) that were not supplied by the L3 cache. Available PDIST counters: 0",
"SampleAfterValue": "100003",
"UMask": "0x1"
}
]
44 changes: 44 additions & 0 deletions lib/libpmc/pmu-events/arch/x86/alderlaken/other.json
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[
{
"BriefDescription": "This event is deprecated. [This event is alias to MISC_RETIRED.LBR_INSERTS]",
"Counter": "0,1,2,3,4,5",
"Deprecated": "1",
"EventCode": "0xe4",
"EventName": "LBR_INSERTS.ANY",
"SampleAfterValue": "1000003",
"UMask": "0x1"
},
{
"BriefDescription": "Counts streaming stores which modify a full 64 byte cacheline that have any type of response.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xB7",
"EventName": "OCR.FULL_STREAMING_WR.ANY_RESPONSE",
"MSRIndex": "0x1a6,0x1a7",
"MSRValue": "0x800000010000",
"PublicDescription": "Counts streaming stores which modify a full 64 byte cacheline that have any type of response. Available PDIST counters: 0",
"SampleAfterValue": "100003",
"UMask": "0x1"
},
{
"BriefDescription": "Counts streaming stores which modify only part of a 64 byte cacheline that have any type of response.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xB7",
"EventName": "OCR.PARTIAL_STREAMING_WR.ANY_RESPONSE",
"MSRIndex": "0x1a6,0x1a7",
"MSRValue": "0x400000010000",
"PublicDescription": "Counts streaming stores which modify only part of a 64 byte cacheline that have any type of response. Available PDIST counters: 0",
"SampleAfterValue": "100003",
"UMask": "0x1"
},
{
"BriefDescription": "Counts streaming stores that have any type of response.",
"Counter": "0,1,2,3,4,5",
"EventCode": "0xB7",
"EventName": "OCR.STREAMING_WR.ANY_RESPONSE",
"MSRIndex": "0x1a6,0x1a7",
"MSRValue": "0x10800",
"PublicDescription": "Counts streaming stores that have any type of response. Available PDIST counters: 0",
"SampleAfterValue": "100003",
"UMask": "0x1"
}
]
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