Datasheet

Configuration Registers
3-56 Intel
®
E8870 Scalable Node Controller (SNC) Datasheet
19:13 RW 0
Threshold Comparison
Value compared against number of entries in the selected queue of buffer.
Clocks are counted (utilization), if the number of entries in the queue are greater
than the value in the Threshold Comparison field.
12 RW 0
TRDY Utilization
Number of clocks TRDY# is active
11 RW 0
DRDY Utilization
Number of clocks DRDY# is active
10 RW 0
DBSY Utilization
Number of clocks DBSY# is active
9RW0
BNR Utilization
Number of clocks BNR# is active
8RW0
BPRI Utilization
Number of clocks BPRI# is active
7RW0
Processor bus Data Bus Utilization
This is the number of clocks when DBSY# or DRDY# are active.
6RW0
Processor Bus Address Bus Utilization
Selected by “Bus Select.” Approximated by three clocks for the Itanium 2
processor per ADS, plus BNR# utilization.
5RW0
Memory Row Address Busy
Utilization count due to the memory row address bus in use.
4RW0
Memory Column Address Busy
Utilization count due to the memory column address bus in use.
3RW0
Memory Data Bus Busy
Utilization of actual data transfers on the memory data bus.
2RW0
Memory Precharge Stall
Utilization count during time RAS is held off due to precharge conditions.
1RW0
Read or Copy Queue Stall
Utilization count when the number of read queue entries available are below the
processor bus stall threshold of the copy queue is full – BNR# is issued to the
system bus.
0RW0
Write Buffer Stall
Utilization count when the number of write posting buffer entries available are
below the processor bus stall threshold – BNR# is issued to the system bus.
Device: NodeID
Function: 3
Offset: B8h (FSBPMEU0), F8h (FSBPMEU1) (Continued)
Bit Attr Default Description