Sun Microsystems, Inc.

David W Gibbs

Nathaniel David Naegle

David C Kehlet

Wayne Eric Burk

A computer system may include several integrated circuits and a routing circuit configured to route several data streams between the integrated circuits. The routing circuit includes several input ports, several output ports, and a signature analysis register coupled to one of the output ports. The signature analysis register is configured to collect data conveyed via the output port dependent upon whether the signature analysis register receives a tag identifying one of the plurality of data streams.

System and method for performing predictable signature analysis in the presence of multiple data streams

In one embodiment, a computer system includes a first component configured to output data on a bus in response to a request for data from a second component. The data output by the first component may include both the requested data and unrequested data, and the unrequested data may have an unpredictable value. A controller coupled to the bus may be configured to replace the unrequested data with data that has a predictable value. A signature analysis register included in the second component is configured to capture the requested data and the predictable data output by the controller. Thus, the signature captured in the second component may be predictable, despite the unpredictable data output by the first component.

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Oxnard, CA, United States of America

David W Gibbs