19-76 Vol. 3B

PERFORMANCE-MONITORING EVENTS

06H

20H

UNC_SNP_RESP_TO_LOCAL_H

OME.WB

Number of responses to code or data read snoops to 

the local home that the L3 has the referenced line 

cached in the M state. 

07H

01H

UNC_SNP_RESP_TO_REMOTE

_HOME.I_STATE

Number of snoop responses to a remote home that L3 

does not have the referenced cache line. 

07H

02H

UNC_SNP_RESP_TO_REMOTE

_HOME.S_STATE

Number of snoop responses to a remote home that L3 

has the referenced line cached in the S state.

07H

04H

UNC_SNP_RESP_TO_REMOTE

_HOME.FWD_S_STATE

Number of responses to code or data read snoops to a 

remote home that the L3 has the referenced cache 

line in the E state. The L3 cache line state is changed 

to the S state and the line is forwarded to the remote 

home in the S state.

07H

08H

UNC_SNP_RESP_TO_REMOTE

_HOME.FWD_I_STATE

Number of responses to read invalidate snoops to a 

remote home that the L3 has the referenced cache 

line in the M state. The L3 cache line state is 

invalidated and the line is forwarded to the remote 

home in the M state.

07H

10H

UNC_SNP_RESP_TO_REMOTE

_HOME.CONFLICT

Number of conflict snoop responses sent to the local 

home.

07H

20H

UNC_SNP_RESP_TO_REMOTE

_HOME.WB

Number of responses to code or data read snoops to a 

remote home that the L3 has the referenced line 

cached in the M state. 

07H

24H

UNC_SNP_RESP_TO_REMOTE

_HOME.HITM

Number of HITM snoop responses to a remote home.

08H

01H

UNC_L3_HITS.READ

Number of code read, data read and RFO requests that 

hit in the L3.

08H

02H

UNC_L3_HITS.WRITE

Number of writeback requests that hit in the L3. 

Writebacks from the cores will always result in L3 hits 

due to the inclusive property of the L3.

08H

04H

UNC_L3_HITS.PROBE

Number of snoops from IOH or remote sockets that hit 

in the L3.

08H

03H

UNC_L3_HITS.ANY

Number of reads and writes that hit the L3. 

09H

01H

UNC_L3_MISS.READ

Number of code read, data read and RFO requests that 

miss the L3.

09H

02H

UNC_L3_MISS.WRITE

Number of writeback requests that miss the L3. 

Should always be zero as writebacks from the cores 

will always result in L3 hits due to the inclusive 

property of the L3.

09H

04H

UNC_L3_MISS.PROBE

Number of snoops from IOH or remote sockets that 

miss the L3.

09H

03H

UNC_L3_MISS.ANY

Number of reads and writes that miss the L3. 

0AH

01H

UNC_L3_LINES_IN.M_STATE

Counts the number of L3 lines allocated in M state. The 

only time a cache line is allocated in the M state is 

when the line was forwarded in M state is forwarded 

due to a Snoop Read Invalidate Own request.

0AH

02H

UNC_L3_LINES_IN.E_STATE

Counts the number of L3 lines allocated in E state.

0AH

04H

UNC_L3_LINES_IN.S_STATE

Counts the number of L3 lines allocated in S state.

Table 19-18.  Non-Architectural Performance Events In the Processor Uncore for 

Intel® Core™ i7 Processor and Intel® Xeon® Processor 5500 Series (Contd.)

Event

Num.

Umask

Value

Event Mask Mnemonic

Description

Comment