System independent and scalable packet buffer management...

Details System independent and scalable packet buffer management... System independent and scalable packet buffer management...

2002-11-08

2008-12-23

Abelson, Ronald (Department: 2619)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S429000, C709S245000, C711S200000, C711S216000

Reexamination Certificate

active

07468985

ABSTRACT:
A circular buffer storing packets for processing by one or more network processors employs an empty buffer address register identifying where a next received packet should be stored, a next packet address register identifying the next packet to be processed, and a packet-processing address register within each network processor identifying the packet being processed by that network processor. The n-bit addresses to the buffer are mapped or masked from/to the m-bit packet-processing address registers by software, allowing the buffer size to be fully scalable. A dedicated packet retrieval instruction supported by the network processor(s) retrieves a new packet for processing using the next packet address register and copies that into the associated packet-processing address register for use in subsequent accesses. Buffer management is thus independent of the network processor architecture.

REFERENCES:
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patent: 5454089 (1995-09-01), Nguyen et al.
patent: 5826041 (1998-10-01), Ogus
patent: 6434148 (2002-08-01), Park
patent: 2001/0020941 (2001-09-01), Reynolds
patent: 2002/0156990 (2002-10-01), Chen

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