Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
145
Datasheet Volume Two: Functional Description, February 2014
Processor Uncore Configuration Registers
13.2.4.29 RDIMMTIMINGCNTL
RDIMM Timing Control. 
28:28
RW
0x1
ADAPT_PG_CLSE (adapt_pg_clse):
This register is programmed in conjunction with MCMTR.CLOSEPG to enable three 
different modes:
1: Closed Page Mode = Mode -1 MCMTR.CLOSE_PG = 1 and ADAPT_PG_CLSE = 0
2: Open Page Mode = Mode -1 MCMTR.CLOSE_PG = 0 and ADAPT_PG_CLSE = 0
3: Adaptive Open = Open -1 MCMTR.CLOSE_PG = 0 and ADAPT_PG_CLSE = 1
MCMTR.CLOSE_PG = 1 and ADAPT_PG_CLSE = 1 is illegal.
When ADAPT_PG_CLSE = 0, the page close idle timer gets set with 
IDLE_PAGE_RST_VAL times 4.
27:21
RW
0x6
OPC_TH (opc_th):
Overdue Page Close (OPC) Threshold
If the number of OPCs in a given window is larger than this threshold, we 
decrease the RV.
20:14
RW
0x6
PPC_TH (ppc_th):
Premature Page Close (PPC) Threshold
If the number of PPCs in a given window is larger than this threshold, we increase 
the RV
13:6
RW
0x40
WIN_SIZE (win_size):
Window Size (WS): The number of requests that we track before making a 
decision to adapt the RV.
5:0
RW
0x8
IDLE_PAGE_RST_VAL (idle_page_rst_val):
Idle Counter Reset Value (RV): This is the value that effectively adapts. It 
determines what value the various ICs are set to whenever they are reset. It 
therefore controls the number of cycles before an automatic page close is 
triggered for an entire channel.
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
Type:
CFG
PortID: N/A
Bus:
1
Device: 16
Function:
0,1,4,5
Bus:
1
Device: 30
Function:
0,1,4,5
Offset:
0x23c
Bit
Attr
Default
Description
31:29
RV
-
Reserved.
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