Intel E7-8891 v2 CM8063601377422 Manual De Usuario

Intel

®

 Xeon

® 

Processor E7-2800/4800/8800 v2 Product Family

395

Datasheet Volume Two: Functional Description, February 2014

63:34

RV

-

Reserved.

33:30

RW_L

0x8

fifo_cdt_threshold:

The IRP has a FIFO on the inbound path feeding the R2PCIe. This is only a 

staging FIFO to assist in the flow of inbound traffic. This field specifies the 

number of FIFO entries to use in this IRP staging FIFO.

29:28

RW_L

0x1

ncbncs_cdt_threshold:

Number of credits allocated for IIO to UBox NCB and NCS combined. Uses 

entries in R2PCIe BL Pool B.

27:24

RW_L

0x8

idi_cdt_threshold:

Specifies the credits used for
I2U data for VC0
I2U data VC1/VCm
I2U data VCp
DRS to CBox

These use R2PCIe BL Pool A entries.

23:22

RW_L

0x1

qpi_drs_cdt_threshold:

21:20

RW_L

0x1

vc1_cdt_threshold:

Specifies the credits used for VC1 and VCm combined. Uses R2PCIe AD Pool 

A credits.

19:18

RW_L

0x1

vcp_cdt_threshold:

17:14

RW_L

0x9

vc0_wr_cdt_threshold:

13:10

RW_L

0xb

vc0_rd_cdt_threshold:

These are the total credits allocated for read requests for VC0. There are 

three transaction types that can use this pool:

Non-posted read requests (used for remote peer-to-peer)
A credit from this pool will be used to send these.

Posted read requests (used for read requests to HA, either local or remote)
A credit from this pool will be used to send these.
A credit from the vc0_rdp0_cdt_threshold pool will be used.

NDR to Intel

®

QPI requests

A credit from the qpi_ndr_cdt_threshold will be used.
If more than one credit is used, then a credit will be used from this pool too.

The total number of credits reserved for all three types is 12, regardless of 

how these registers are programmed.

9:6

RW_L

0x7

vc0_rd_p0_cdt_threshold:

These represent how many of the vc0_rd_cdt_threshold credits may be used 

for non-posted reads (remote peer-to-peer).

Posted read requests (used for read requests to HA, either local or remote)
A credit from this pool will be used to send these.
A credit from the vc0_rd_cdt_threshold pool will be used.