Vol. 3B 19-111

PERFORMANCE-MONITORING EVENTS

34H

08H

UNC_QHL_SLEEPS.IOH_CONFLI

CT

Counts number of occurrences a request was put to 

sleep due to IOH address conflicts. While in the sleep 

state, the request is not eligible to be scheduled to the 

QMC.

34H

10H

UNC_QHL_SLEEPS.REMOTE_C

ONFLICT

Counts number of occurrences a request was put to 

sleep due to remote socket address conflicts. While in 

the sleep state, the request is not eligible to be 

scheduled to the QMC.

34H

20H

UNC_QHL_SLEEPS.LOCAL_CON

FLICT

Counts number of occurrences a request was put to 

sleep due to local socket address conflicts. While in the 

sleep state, the request is not eligible to be scheduled 

to the QMC.

35H

01H

UNC_ADDR_OPCODE_MATCH.I

OH

Counts number of requests from the IOH, 

address/opcode of request is qualified by mask value 

written to MSR 396H. The following mask values are 

supported:
0: NONE
40000000_00000000H:RSPFWDI
40001A00_00000000H:RSPFWDS
40001D00_00000000H:RSPIWB

Match opcode/address 

by writing MSR 396H 

with mask supported 

mask value.

35H

02H

UNC_ADDR_OPCODE_MATCH.R

EMOTE

Counts number of requests from the remote socket, 

address/opcode of request is qualified by mask value 

written to MSR 396H. The following mask values are 

supported:
0: NONE
40000000_00000000H:RSPFWDI
40001A00_00000000H:RSPFWDS
40001D00_00000000H:RSPIWB

Match opcode/address 

by writing MSR 396H 

with mask supported 

mask value.

35H

04H

UNC_ADDR_OPCODE_MATCH.L

OCAL

Counts number of requests from the local socket, 

address/opcode of request is qualified by mask value 

written to MSR 396H. The following mask values are 

supported:
0: NONE
40000000_00000000H:RSPFWDI
40001A00_00000000H:RSPFWDS
40001D00_00000000H:RSPIWB

Match opcode/address 

by writing MSR 396H 

with mask supported 

mask value.

40H

01H

UNC_QPI_TX_STALLED_SINGL

E_FLIT.HOME.LINK_0

Counts cycles the Quickpath outbound link 0 HOME 

virtual channel is stalled due to lack of a VNA and VN0 

credit. 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.

40H

02H

UNC_QPI_TX_STALLED_SINGL

E_FLIT.SNOOP.LINK_0

Counts cycles the Quickpath outbound link 0 SNOOP 

virtual channel is stalled due to lack of a VNA and VN0 

credit. 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.

Table 19-20.  Non-Architectural Performance Events In the Processor Uncore for 

Processors Based on Intel® Microarchitecture Code Name Westmere (Contd.)

Event

Num.

Umask

Value

Event Mask Mnemonic

Description

Comment