Extended fairness arbitration for chains of point-to -point...

Details Extended fairness arbitration for chains of point-to -point... Extended fairness arbitration for chains of point-to -point...

2005-01-18

2008-09-30

Park, Ilwoo (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Flow controlling

C710S036000

Reexamination Certificate

active

07430622

ABSTRACT:
Buffer-level arbitration is used to allocate released buffers, based on received flow control credits, between local packets and received packets on respective virtual channels in accordance with a determined insertion rate relative to a second number of received packets to be forwarded. Virtual channel arbitration also is performed to identify, from among the multiple virtual channels, the packets that should be sent next along the local and forwarded paths. Device arbitration is then performed to identify, from the insertion and forwarding paths, the packets that should be output onto an output transmission link, based on the determined insertion rate. Performing the arbitration at each step in accordance with the insertion rate maximizes packet bandwidth fairness among the multiple devices supplying packets across multiple virtual channels.

REFERENCES:
patent: 2002/0083233 (2002-06-01), Owen et al.
patent: 2003/0097514 (2003-05-01), Ennis et al.
patent: 2004/0030799 (2004-02-01), Gulati
“AMD-3181™ HyperTransport™ PCI-X® Tunnel Data Sheet”, 24637 Rev. 3.02, Aug. 10, 2004, pp. 1-87.

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