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:
Jun. 06, 2000
Filed:
Dec. 31, 1996
Joel S Emer, Acton, MA (US);
Rebecca Stamm, Wellesley, MA (US);
Trggve Fossum, Northborough, MA (US);
Robert H Halstead, Jr, Belmont, MA (US);
George Z Chrysos, Marlboro, MA (US);
Dean Tullsen, San Diego, CA (US);
Susan Eggers, Seattle, WA (US);
Henry M Levy, Seattle, WA (US);
Compaq Computer Corporation, Houston, TX (US);
Abstract
A technique is provided for selecting a preferred thread from a plurality of threads executing within a simultaneous multithreaded, out-of-order execution computer system, the preferred thread possessing those instructions which, while in flight within the pipeline of the computer system provide, in contrast to those instructions belonging to other threads, a more beneficial performance of the central processing unit of the computer system. To determine the preferred thread, a technique is provided to evaluate attributes of each thread which indicate whether the thread includes a number of instructions which are likely to be cancelled while in flight or whether a thread includes instructions which will remain in the instruction queue for a number of cycles, unable to execute, thus stalling the execution of the thread to which the instruction belongs.