IBM Intel Xeon E5504 46D1351 User Manual

Intel® Xeon® Processor 5500 Series Datasheet, Volume 2

51

Maximum requests expected from the sibling (number of TAD home trackers allocated 
to sibling). The maximum RTID value that may be used is one less than this number. 
Home Trackers are allocated in groups of 8, so bits 2:0 of the register may not be 
written, and bits 5:3 indicate how many groups of 8 are allocated. 

Maximum requests expected from local accesses (number of TAD home trackers 
allocated to the local queue). The maximum RTID value that may be used is one less 
than this number. Home Trackers are allocated in groups of 8, so bits 2:0 of the register 
may not be written, and bits 5:3 indicate how many groups of 8 are allocated.

Maximum number of RTIDs other homes have. How many requests can this caching 
agent send to the other home agents. This number is one more than the highest 
numbered RTID to use. Note these values reset to 2, and need to be increased by BIOS 
to whatever the home agents can support.

5:3

RW

2

VALUE. Maximum TAD requests from sibling (allocated in groups of 8). 

5:3

RW

3

VALUE. Maximum TAD requests from local accesses (allocated in groups of 

8). 

21:16

RW

2

LOCAL_MC. Maximum number of RTIDs for the local home agent.

13:8

RW

2

SIBLING. Maximum number of RTIDs for the sibling home agent.

5:0

RW

2

CHIPSET. Maximum number of RTIDs for the IOH home agent.