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Intel® Xeon® Processor E7-2800/4800/8800 v2 Product Family

3

Datasheet Volume Two: Functional Description, February 2014

Contents

Overview ................................................................................................................. 17
1.1

Introduction ..................................................................................................... 17

Terminology ..................................................................................................... 18

Related Documents ........................................................................................... 21

State of Data .................................................................................................... 22

The Processor Architecture Overview ...................................................................... 23
2.1

Core Features 2 ................................................................................................ 23
2.1.1

Frequency ............................................................................................. 24

Caching Hierarchy .................................................................................. 24

Addressing Space ................................................................................... 24

Multi-threaded Cores .............................................................................. 24

Power Management ................................................................................ 24

Technologies ................................................................................ 24

Uncore Features................................................................................................ 25
2.2.1

The Ring ............................................................................................... 25

Last Level Cache (LLC)............................................................................ 25

Caching Agent (Cbo)............................................................................... 25

QuickPath Interconnect (Intel

QPI)................................................ 25

Home Agent (HA) ................................................................................... 26

Integrated Memory Controller (iMC).......................................................... 27

Power Control Unit (PCU) ........................................................................ 27

Integrated I/O module (IIO) .................................................................... 27

Config Agent (Ubox) ............................................................................... 28

2.2.10 Performance Monitor (PerfMon) ................................................................ 28

Cbo Functional Description ...................................................................................... 29
3.1

Basic Flows....................................................................................................... 29
3.1.1

Handling Core/IIO Request ...................................................................... 29

Source Address Decoder..................................................................................... 30
3.2.1

System Address Spaces .......................................................................... 30

Uncore SAD Relationship to Other Address Decoders................................... 30

SAD Address Spaces............................................................................... 31

DRAM/MMIO Decoders ............................................................................ 32

Legacy Decoder ..................................................................................... 32

TSEG Range (CSR_TSEG <= addr) ........................................................... 33

Configuration Address Space.................................................................... 33

NO_EGO Range...................................................................................... 33

I/O Address Space.................................................................................. 33

3.2.10 SAD Glossary......................................................................................... 33

Viral Support .................................................................................................... 34

Home Agent Functional Description ......................................................................... 35
4.1

Home Agent Architecture Overview...................................................................... 35
4.1.1

Ring Interface for Home Agent ................................................................. 35

Backup Tracker and Home Tracker ........................................................... 35

Intel QPI Home Logic .............................................................................. 36

Home Agent Data Buffer (HADB) .............................................................. 36

Memory Controller Interface .................................................................... 36

Directory Support.............................................................................................. 36

RTID Allocation ................................................................................................. 36

Backup Tracker (BT) .......................................................................................... 36
4.4.1

Backup Tracker Mode.............................................................................. 36

NodeID Conventions .......................................................................................... 36