System for delaying dequeue of commands received prior to fence

Details System for delaying dequeue of commands received prior to fence System for delaying dequeue of commands received prior to fence

1997-06-17

2000-04-04

Lee, Thomas C.

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output command process

710 6, 710 24, 710 58, 712225, 712245, 713401, 709 3, G06F 1314, G06F 940

Patent

active

060473347

ABSTRACT:
A method and apparatus for fencing the execution of commands. A fence command and an executable command are received in succession. The executable command is enqueued in a first queue together with an indication that the executable command succeeded the fence command. A synchronization value is enqueued in a second queue. The executable command is then delayed from being dequeued from the first queue until the synchronization value is advanced to the head of the second queue.

REFERENCES:
patent: 5418971 (1995-05-01), Carlson
patent: 5517611 (1996-05-01), Deering
patent: 5603063 (1997-02-01), Au
patent: 5758051 (1998-05-01), Moreno et al.
patent: 5765037 (1998-06-01), Morrison et al.
patent: 5911051 (1999-06-01), Carson et al.
"Accelerated Graphics Port Interface Specification Revision 1.0", Published by Intel Corporation, Jul. 31, 1996, pp. 1-151.

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