Method, apparatus, and computer program product for...

Details Method, apparatus, and computer program product for... Method, apparatus, and computer program product for...

2007-09-04

2007-09-04

Song, Jasmine (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S109000, C711S110000, C710S054000

Reexamination Certificate

active

10988232

ABSTRACT:
A method, apparatus, and computer program product are provided for implementing an enhanced circular queue using loop counts for command processing. A circular queue includes a plurality of entries for storing commands. As command entries are added to the queue at the head of the queue, a head loop count is stored with each command entry. A head pointer is updated to the head of the queue. When the head pointer wraps from a last queue entry to a first queue entry, the head loop count is incremented. A tail pointer points to an oldest command entry, and is updated when the oldest command entry is executed. When the tail pointer advances and wraps from a last queue entry to a first queue entry, the tail pointer loop count is incremented.

REFERENCES:
patent: 6131113 (2000-10-01), Ellsworth et al.
patent: 6785862 (2004-08-01), Zhang
patent: 6988186 (2006-01-01), Eickemeyer et al.
patent: 2003/0163660 (2003-08-01), Lam
patent: 2005/0283577 (2005-12-01), Sivaram et al.

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