Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
Processor Uncore Configuration Registers
144
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
Datasheet Volume Two: Functional Description, February 2014
13.2.4.27 RPQAGE
Read Pending Queue Age Counters. 
13.2.4.28 IDLETIME
At a high level, the goal of any page closing policy is to trade off some Premature Page 
Closes (PPCs) in order to avoid more Overdue Page Closes (OPCs). In other words, we 
want to avoid costly Page Misses and turn them into Page Empties at the expense of 
occasionally missing a Page Hit and instead getting a Page Empty. The scheme achieves 
this by tracking the number of PPCs and OPCs over a certain configurable window (of 
requests). It then compares the two values to configurable thresholds, and adjusts the 
amount of time before closing pages accordingly. 
Type:
CFG
PortID: N/A
Bus:
1
Device: 16
Function:
0,1,4,5
Bus:
1
Device: 30
Function:
0,1,4,5
Offset:
0x22c
Bit
Attr
Default
Description
31:12
RV
-
Reserved.
11:0
RW
0x0
MR0_SHADOW (mr0_shadow):
BIOS program this field for MR0 register A11:A0 for all DIMMs in this channel. 
iMC hardware is dynamically issuing MRS to MR0 to control the fast and slow 
exit PPD (MRS MR0 A12). Other address bits (A[11:0]) is defined by this 
register field. A15:A13 are always zero.
Type:
CFG
PortID: N/A
Bus:
1
Device: 16
Function:
0,1,4,5
Bus:
1
Device: 30
Function:
0,1,4,5
Offset:
0x234
Bit
Attr
Default
Description
31:26
RV
-
Reserved.
25:16
RW
0x0
IOCount (iocount):
This is the RPQ Age Counter for the Medium and Low priority (VC0) 
nonisochronous transactions issued from HA. The counter is increased by 
one every time there's a CAS command sent. When the RPQ Age Counter is 
equal to this configured field value, the nonisochronous transaction is aged 
to the next priority level. When programming this field, BIOS must set this 
field to nonzero value before setting the MCMTR.NORMAL = 1.
15:0
RV
-
Reserved
Type:
CFG
PortID: N/A
Bus:
1
Device: 16
Function:
0,1,4,5
Bus:
1
Device: 30
Function:
0,1,4,5
Offset:
0x238
Bit
Attr
Default Description
31:29
RV
-
Reserved.
downloadlike
ArtboardArtboardArtboard
Report Bug