19-124 Vol. 3B
PERFORMANCE-MONITORING EVENTS
2B
H
See
and
L2_LOCK.(Core, Cache Line
State)
L2 locked accesses.
This event counts all locked accesses to cache lines that
miss the L1 data cache.
The event can count occurrences for this core or both cores.
It can also count accesses to cache lines at different MESI
states.
2E
H
See
and
L2_RQSTS.(Core, Prefetch,
Cache Line State)
L2 cache requests.
This event counts all completed L2 cache requests. This
includes L1 data cache reads, writes, and locked accesses,
L1 data prefetch requests, instruction fetches, and all L2
hardware prefetch requests.
This event can count occurrences:
• For this core or both cores.
• Due to demand requests and L2 hardware prefetch
requests together, or separately.
• Of accesses to cache lines at different MESI states.
2E
H
41
H
L2_RQSTS.SELF.
DEMAND.I_STATE
L2 cache demand
requests from this
core that missed the
L2.
This event counts all completed L2 cache demand requests
from this core that miss the L2 cache. This includes L1 data
cache reads, writes, and locked accesses, L1 data prefetch
requests, and instruction fetches.
This is an architectural performance event.
2E
H
4F
H
L2_RQSTS.SELF.
DEMAND.MESI
L2 cache demand
requests from this
core.
This event counts all completed L2 cache demand requests
from this core. This includes L1 data cache reads, writes,
and locked accesses, L1 data prefetch requests, and
instruction fetches.
This is an architectural performance event.
30
H
See
and
L2_REJECT_BUSQ.(Core,
Prefetch, Cache Line State)
Rejected L2 cache
requests.
This event indicates that a pending L2 cache request that
requires a bus transaction is delayed from moving to the bus
queue. Some of the reasons for this event are:
• The bus queue is full.
• The bus queue already holds an entry for a cache line in
the same set.
The number of events is greater or equal to the number of
requests that were rejected.
• For this core or both cores.
• Due to demand requests and L2 hardware prefetch
requests together, or separately.
• Of accesses to cache lines at different MESI states.
32
H
See
L2_NO_REQ.(Core)
Cycles no L2 cache
requests are pending.
This event counts the number of cycles that no L2 cache
requests were pending from a core. When using the
BOTH_CORE modifier, the event counts only if none of the
cores have a pending request. The event counts also when
one core is halted and the other is not halted.
The event can count occurrences for this core or both cores.
3A
H
00
H
EIST_TRANS
Number of Enhanced
Intel SpeedStep
Technology (EIST)
transitions.
This event counts the number of transitions that include a
frequency change, either with or without voltage change.
This includes Enhanced Intel SpeedStep Technology (EIST)
and TM2 transitions.
The event is incremented only while the counting core is in
C0 state. Since transitions to higher-numbered CxE states
and TM2 transitions include a frequency change or voltage
transition, the event is incremented accordingly.
Table 19-23. Non-Architectural Performance Events in Processors Based on Intel® Core™ Microarchitecture (Contd.)
Event
Num
Umask
Value
Event Name
Definition
Description and
Comment