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Alder Lake - P-Core Offcore Events

Microarchitectures

  • Intel® Microarchitecture Code Named Golden Cove and Raptor Cove (Performance Core)
  • Intel® Microarchitecture Code Named Gracemont (Efficient Core)

P-Core Offcore Events

Event Name Description Programming Info
OCR.READS_TO_CORE.L3_HIT Counts all data read, code read, RFO and ITOM requests including demands and prefetches to the core caches (L1 or L2) that hit in the L3 or were snooped from another core's caches. EventSel={2AH,2BH} UMask=01H MSR_OFFCORE_RSPx{1A6H,1A7H}=1F803C4477H
OCR.DEMAND_DATA_RD.L3_MISS Counts demand data reads that were not supplied by the L3 cache. EventSel={2AH,2BH} UMask=01H MSR_OFFCORE_RSPx{1A6H,1A7H}=3FBFC00001H
OCR.DEMAND_RFO.L3_MISS Counts demand read for ownership (RFO) requests and software prefetches for exclusive ownership (PREFETCHW) that were not supplied by the L3 cache. EventSel={2AH,2BH} UMask=01H MSR_OFFCORE_RSPx{1A6H,1A7H}=3FBFC00002H
OCR.COREWB_M.L3_HIT Counts writebacks of modified cachelines that hit in the L3 or were snooped from another core's caches. EventSel={2AH,2BH} UMask=01H MSR_OFFCORE_RSPx{1A6H,1A7H}=1F803C0008H
OCR.COREWB_NONM.L3_HIT Counts writebacks of non-modified cachelines that hit in the L3 or were snooped from another core's caches. EventSel={2AH,2BH} UMask=01H MSR_OFFCORE_RSPx{1A6H,1A7H}=1F803C1000H
OCR.DEMAND_DATA_RD.ANY_RESPONSE Counts demand data reads that have any type of response. EventSel={2AH,2BH} UMask=01H MSR_OFFCORE_RSPx{1A6H,1A7H}=10001H
OCR.STREAMING_WR.ANY_RESPONSE Counts streaming stores that have any type of response. EventSel={2AH,2BH} UMask=01H MSR_OFFCORE_RSPx{1A6H,1A7H}=10800H
OCR.DEMAND_RFO.ANY_RESPONSE Counts demand read for ownership (RFO) requests and software prefetches for exclusive ownership (PREFETCHW) that have any type of response. EventSel={2AH,2BH} UMask=01H MSR_OFFCORE_RSPx{1A6H,1A7H}=10002H
OCR.DEMAND_DATA_RD.L3_HIT.SNOOP_HITM Counts demand data reads that resulted in a snoop hit in another cores caches, data forwarding is required as the data is modified. EventSel={2AH,2BH} UMask=01H MSR_OFFCORE_RSPx{1A6H,1A7H}=10003C0001H
OCR.DEMAND_DATA_RD.L3_HIT.SNOOP_HIT_WITH_FWD Counts demand data reads that resulted in a snoop hit in another cores caches which forwarded the unmodified data to the requesting core. EventSel={2AH,2BH} UMask=01H MSR_OFFCORE_RSPx{1A6H,1A7H}=8003C0001H
OCR.DEMAND_RFO.L3_HIT.SNOOP_HITM Counts demand read for ownership (RFO) requests and software prefetches for exclusive ownership (PREFETCHW) that resulted in a snoop hit in another cores caches, data forwarding is required as the data is modified. EventSel={2AH,2BH} UMask=01H MSR_OFFCORE_RSPx{1A6H,1A7H}=10003C0002H
OCR.DEMAND_DATA_RD.DRAM Counts demand data reads that were supplied by DRAM. EventSel={2AH,2BH} UMask=01H MSR_OFFCORE_RSPx{1A6H,1A7H}=184000001H