Intel E7-8891 v2 CM8063601377422 사용자 설명서

Intel

®

 Xeon

® 

Processor E7-2800/4800/8800 v2 Product Family

145

Datasheet Volume Two: Functional Description, February 2014

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.

31:29

RV

-

Reserved.