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:
Jan. 20, 2004
Filed:
Apr. 20, 2000
Jason N. Dale, Austin, TX (US);
Jim A. Kahle, Austin, TX (US);
Douglas R. Logan, Austin, TX (US);
Alex E. Mericas, Austin, TX (US);
William J. Starke, Round Rock, TX (US);
Philip L. Vitale, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method, system and apparatus for instruction execution tracing with out of order speculative processors. Information corresponding to the state of an instruction cache and a data cache is stored in a trace storage device along with information corresponding to instructions sequenced and executed by the processor. When a cache load is necessary, updated cache information is stored in the trace storage device. Thereby, the state of the cache at all times during execution of instructions may be known from the information stored in the trace storage device. Additionally, the particular instructions sequenced and executed is known from the sequenced instructions information and the executed instructions information stored in the trace storage device. Hence the instruction execution stream may be reconstructed from the information stored in the trace storage device.