Datasheet

Configuration Registers
3-54 Intel
®
E8870 Scalable Node Controller (SNC) Datasheet
3.10.10 FSBPMER[1:0]: Processor Bus Performance Monitor
Resource Events
This register is used to select resource events. Use of this event register is mutually exclusive with
other processor bus event registers. Match results from each field of this register are OR’ed to
select the event.
8:4 RW 0
Agent IDs (AND’ed Group)
1xxxx SNC
x1xxx CPU/Package 3
xx1xx CPU/Package 2
xxx1x CPU/Package 1
xxxx1 CPU/Package 0
3:0 RW 0
Extended Functions (AND’ed Group)
Note: “0000” will match anything.
1xxx EXF4
x1xx EXF3
xx1x EXF2
xxx1 EXF1
Device: NodeID
Function: 3
Offset: B0h (FSBPMEH0), F0h(FSBPMEH1) (Continued)
Bit Attr Default Description
Device: NodeID
Function: 3
Offset: B4h (FSBPMER0), F4h(FSBPMER1)
Bit Attr Default Description
31:11 RV 0 Reserved
10 RW 0
Copy Hit
Indicates a Read transaction hit an entry in the Write Buffer and was copied
rather than accessing memory.
9RW0
Snoop Stall Event
This is the event of a processor bus snoop stall, i.e. HIT and HITM active
concurrently.
Note: Only one event is recorded when HIT and HITM continue to be active
every other clock, indicating one snoop stall event.
8RW0
BNR Event
This is the event of a BNR activation on the bus.
Note only one event is recorded when BNR is continuously active for multiple
clocks.