The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 09, 2008
Filed:
Aug. 04, 2005
Mehdi Entezari, Collegeville, PA (US);
Justin A. Refice, Norristown, PA (US);
Mehdi Entezari, Collegeville, PA (US);
Justin A. Refice, Norristown, PA (US);
Unisys Corporation, Blue Bell, PA (US);
Abstract
A method and apparatus for capturing and logging activities of a state machine prior to error. The state machine receives a packet and processes the packet. A state machine monitor is provided for each state machine. The state machine monitor logs activities of its associated state machine in a trace buffer when the state machine changes its state. The changes of the states in the state machine are traced to create a record in the trace buffer. Optionally, a snooper may be provided to determine whether a predetermined condition exists in the received packet. The snooper attaches a trigger tag to the received packet when the predetermined condition exists. The state machine monitor stops tracing the changes of the states of the state machine when the state machine monitor detects the trigger tag in a packet forwarded to its associated state machine.