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Download ECE5465/Intel arch reference/Intel 64 and 32 Arch Sw Dev Man V3B
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PERFORMANCE-MONITORING EVENTS Table A-3. Non-Architectural Performance Events In the Processor Uncore for Intel Core i7 Processor and Intel Xeon Processor 5500 Series Event Num. Umask Value Event Mask Mnemonic 41H 38H UNC_QPI_TX_STALL ED_MULTI_FLIT.LINK _1 42H 02H UNC_QPI_TX_HEADE Number of cycles that the header R.BUSY.LINK_0 buffer in the Quickpath Interface outbound link 0 is busy. 42H 08H UNC_QPI_TX_HEADE Number of cycles that the header R.BUSY.LINK_1 buffer in the Quickpath Interface outbound link 1 is busy. 43H 01H UNC_QPI_RX_NO_PP Number of cycles that snoop T_CREDIT.STALLS.LIN packets incoming to the Quickpath K_0 Interface link 0 are stalled and not sent to the GQ because the GQ Peer Probe Tracker (PPT) does not have any available entries. 43H 02H UNC_QPI_RX_NO_PP Number of cycles that snoop T_CREDIT.STALLS.LIN packets incoming to the Quickpath K_1 Interface link 1 are stalled and not sent to the GQ because the GQ Peer Probe Tracker (PPT) does not have any available entries. 60H 01H UNC_DRAM_OPEN.C H0 Counts number of DRAM Channel 0 open commands issued either for read or write. To read or write data, the referenced DRAM page must first be opened. 60H 02H UNC_DRAM_OPEN.C H1 Counts number of DRAM Channel 1 open commands issued either for read or write. To read or write data, the referenced DRAM page must first be opened. Description Comment Counts cycles the Quickpath outbound link 1 virtual channels are stalled due to lack of VNA and VN0 credits. Note that this event does not filter out when a flit would not have been selected for arbitration because another virtual channel is getting arbitrated. Vol. 3 A-53
