19-56 Vol. 3B

PERFORMANCE-MONITORING EVENTS

Table 19-16.  Non-Architectural Performance Events In the Processor Uncore for 2nd Generation 

Intel® Core™ i7-2xxx, Intel® Core™ i5-2xxx, Intel® Core™ i3-2xxx Processor Series

Event

Num.

1

Umask

Value

Event Mask Mnemonic

Description

Comment

22H

01H

UNC_CBO_XSNP_RESPONSE.M

ISS

A snoop misses in some processor core.

Must combine with 

one of the umask 

values of 20H, 40H, 

80H.

22H

02H

UNC_CBO_XSNP_RESPONSE.I

NVAL

A snoop invalidates a non-modified line in some 

processor core.

22H

04H

UNC_CBO_XSNP_RESPONSE.H

IT

A snoop hits a non-modified line in some processor 

core.

22H

08H

UNC_CBO_XSNP_RESPONSE.H

ITM

A snoop hits a modified line in some processor core.

22H

10H

UNC_CBO_XSNP_RESPONSE.I

NVAL_M

A snoop invalidates a modified line in some processor 

core.

22H

20H

UNC_CBO_XSNP_RESPONSE.E

XTERNAL_FILTER

Filter on cross-core snoops initiated by this Cbox due 

to external snoop request. 

Must combine with at 

least one of 01H, 02H, 

04H, 08H, 10H.

22H

40H

UNC_CBO_XSNP_RESPONSE.X

CORE_FILTER

Filter on cross-core snoops initiated by this Cbox due 

to processor core memory request. 

22H

80H

UNC_CBO_XSNP_RESPONSE.E

VICTION_FILTER

Filter on cross-core snoops initiated by this Cbox due 

to LLC eviction. 

34H

01H

UNC_CBO_CACHE_LOOKUP.M

LLC lookup request that access cache and found line in 

M-state.

Must combine with 

one of the umask 

values of 10H, 20H, 

40H, 80H.

34H

02H

UNC_CBO_CACHE_LOOKUP.E

LLC lookup request that access cache and found line in 

E-state.

34H

04H

UNC_CBO_CACHE_LOOKUP.S

LLC lookup request that access cache and found line in 

S-state.

34H

08H

UNC_CBO_CACHE_LOOKUP.I

LLC lookup request that access cache and found line in 

I-state.

34H

10H

UNC_CBO_CACHE_LOOKUP.RE

AD_FILTER

Filter on processor core initiated cacheable read 

requests. Must combine with at least one of 01H, 02H, 

04H, 08H.

34H

20H

UNC_CBO_CACHE_LOOKUP.WR

ITE_FILTER

Filter on processor core initiated cacheable write 

requests. Must combine with at least one of 01H, 02H, 

04H, 08H.

34H

40H

UNC_CBO_CACHE_LOOKUP.EX

TSNP_FILTER

Filter on external snoop requests. Must combine with 

at least one of 01H, 02H, 04H, 08H.

34H

80H

UNC_CBO_CACHE_LOOKUP.AN

Y_REQUEST_FILTER

Filter on any IRQ or IPQ initiated requests including 

uncacheable, non-coherent requests. Must combine 

with at least one of 01H, 02H, 04H, 08H.

80H

01H

UNC_ARB_TRK_OCCUPANCY.A

LL

Counts cycles weighted by the number of requests 

waiting for data returning from the memory controller. 

Accounts for coherent and non-coherent requests 

initiated by IA cores, processor graphic units, or LLC.

Counter 0 only.

81H

01H

UNC_ARB_TRK_REQUEST.ALL Counts the number of coherent and in-coherent 

requests initiated by IA cores, processor graphic units, 

or LLC.

81H

20H

UNC_ARB_TRK_REQUEST.WRI

TES

Counts the number of allocated write entries, include 

full, partial, and LLC evictions. 

81H

80H

UNC_ARB_TRK_REQUEST.EVIC

TIONS

Counts the number of LLC evictions allocated.