Methods and structure for state preservation to improve...

Details Methods and structure for state preservation to improve... Methods and structure for state preservation to improve...

2005-06-14

2005-06-14

Vo, Tim (Department: 2112)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus interface architecture

C710S240000

Reexamination Certificate

active

06907491

ABSTRACT:
Methods and structure for enhanced bus arbitration providing a hybrid arbitration technique combining priority-based arbitration with round-robin arbitration within a priority level with improved fairness for all devices participating the a round-robin arbitration at a particular priority level. In particular, the invention provides a state retention technique and structure such that the present state of round-robin arbitration at each priority level is saved and restored when a higher priority master device interrupts the round-robin arbitration at a lower level. The restoration of saved state information allows the round-robin arbitration at a lower priority to resume at the saved state to thereby improve fairness of arbitration among devices at a given priority level.

REFERENCES:
patent: 6606676 (2003-08-01), Deshpande et al.
patent: 6738845 (2004-05-01), Hadwiger et al.
patent: 2004/0103231 (2004-05-01), Zhu

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