Method and apparatus for tracking processing of a command

Details Method and apparatus for tracking processing of a command Method and apparatus for tracking processing of a command

1996-12-09

2000-03-07

Wright, Norman Michael

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

714 47, 714 48, 714 16, G06F 1300

Patent

active

060354240

ABSTRACT:
An apparatus for tracking processing of commands between command sources and sinks includes a command directory. The command directory receives a command from at least one command source, receives signals from command sinks, generates status information corresponding to the command based on the command and the received signals, and stores the status information. The status information indicates to which command sink the command is to be routed, whether the command sink has accepted the command, and whether the command sink has completed processing the command. The command directory includes a command buffer having a plurality of directory entries. The command buffer stores a command and associated status information in a directory entry. The command buffer also includes free buffer logic which monitors the status information in each directory entry. Based on this monitoring, the free buffer logic determines whether a directory entry has been disabled or whether command tracking errors exist.

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