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. 15, 2011
Filed:
Jan. 20, 2005
Lee Evan Eisen, Round Rock, TX (US);
David Stephen Levitan, Austin, TX (US);
Francis Patrick O'connell, Austin, TX (US);
Wolfram M. Sauer, Nufingen, DE;
Lee Evan Eisen, Round Rock, TX (US);
David Stephen Levitan, Austin, TX (US);
Francis Patrick O'Connell, Austin, TX (US);
Wolfram M. Sauer, Nufingen, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and logical apparatus for managing processing system resource use for speculative execution reduces the power and performance burden associated with inefficient speculative execution of program instructions. A measure of the efficiency of speculative execution is used to reduce resources allocated to a thread while the speculation efficiency is low. The resource control applied may be the number of instruction fetches allocated to the thread or the number of execution time slices. Alternatively, or in combination, the size of a prefetch instruction storage allocated to the thread may be limited. The control condition may be comparison of the number of correct or incorrect speculations to a threshold, comparison of the number of correct to incorrect speculations, or a more complex evaluator such as the size of a ratio of incorrect to total speculations.