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:
Feb. 27, 2001
Filed:
Nov. 26, 1997
George Z. Chrysos, Marlborough, MA (US);
Jeffrey Dean, Menlo Park, CA (US);
James E. Hicks, Newton, MA (US);
Carl A. Waldspurger, Atherton, CA (US);
William E. Weihl, San Francisco, CA (US);
Daniel L. Leibholz, Cambridge, MA (US);
Edward J. McLellan, Holliston, MA (US);
Compaq Computer Corporation, Houston, TX (US);
Abstract
An apparatus is provided for sampling instructions in a processor pipeline of a computer system. The pipeline has a plurality of processing stages. Instructions are fetched into a first stage of the pipeline. A subset of the fetched instructions are identified as selected instructions. Event, latency, and state information of the system is sampled while any of the selected instructions are in any stage of the pipeline. Software is informed whenever any of the selected instructions leaves the pipeline to read the event and latency information.