Globally unique transaction identifiers

Details Globally unique transaction identifiers Globally unique transaction identifiers

2011-04-05

2011-04-05

Knoll, Clifford H (Department: 2111)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus interface architecture

C711S141000

Reexamination Certificate

active

07921251

ABSTRACT:
In one embodiment of the present invention, a method includes identifying a transaction from a first processor to a second processor of a system with a transaction identifier. The transaction identifier may have a value that is less than or equal to a maximum number of outstanding transactions between the two processors. In such manner, a transaction field for the transaction identifier may be limited to n bits, where the maximum number of outstanding transactions is less than or equal to 2n. In various embodiments, such a transaction identifier combined with a source identifier and a home node identifier may form a globally unique transaction identifier.

REFERENCES:
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Co-Pending U.S. Appl. No. 10/832,607 filed Apr. 27, 2004, entitled “Transmitting Peer-to-Peer Transactions Through a Coherent Interface” by Kenneth C. Creta, et al.
Co-Pending U.S. Appl. No. 10/833,236 filed Apr. 27, 2004, entitled “Separating Transactions Into Different Virtual Channels” by Kenneth C. Creta, et al.

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