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. 01, 2015
Filed:
Apr. 22, 2011
Steven L. Scott, Eau Claire, WI (US);
Gregory B. Titus, Albuquerque, NM (US);
Sung-eun Choi, Kirkland, WA (US);
Troy A. Johnson, Eagan, MN (US);
David Mizell, Sammamish, WA (US);
Michael F. Ringenburg, Seattle, WA (US);
Karlon West, Pflugerville, TX (US);
Steven L. Scott, Eau Claire, WI (US);
Gregory B. Titus, Albuquerque, NM (US);
Sung-Eun Choi, Kirkland, WA (US);
Troy A. Johnson, Eagan, MN (US);
David Mizell, Sammamish, WA (US);
Michael F. Ringenburg, Seattle, WA (US);
Karlon West, Pflugerville, TX (US);
Cray Inc., Seattle, WA (US);
Abstract
A method and system for software emulation of hardware support for multi-threaded processing using virtual hardware threads is provided. A software threading system executes on a node that has one or more processors, each with one or more hardware threads. The node has access to local memory and access to remote memory. The software threading system manages the execution of tasks of a user program. The software threading system switches between the virtual hardware threads representing the tasks as the tasks issue remote memory access requests while in user privilege mode. Thus, the software threading system emulates more hardware threads than the underlying hardware supports and switches the virtual hardware threads without the overhead of a context switch to the operating system or change in privilege mode.