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:
Mar. 25, 2003
Filed:
Oct. 28, 1999
James Allan Kahle, Austin, TX (US);
Alexander Erik Mericas, Austin, TX (US);
Kevin Franklin Reick, Austin, TX (US);
Joel M. Tendler, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The present invention discloses a system and method for implementing instruction tracing in a computer system and in particular a computer system with a tightly coupled shared processor central processor unit (CPU). Each of the processors are generally purpose processors that have been modified by design to allow an instruction to execute and simultaneously to be stored and forwarded to shared memory operable as a trace buffer. Since each processor is general purpose, the trace routine necessary for tracing, can by one of the routines or programs that can be written and executed on either of the processors. One of the processors can run, collect and analyze the executed and store instructions of the other processor. Since the processors can be on a single chip the shared memory bus that writes and reads the executed instructions can operate at high speed. Also since the trace function is part of the multiprocessor architecture its speed of operation will scale with the speed of the processors without modification.