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:
Jul. 28, 2015
Filed:
Jul. 10, 2012
Harold W. Cain, Iii, Katonah, NY (US);
Vijayalakshmi Srinivasan, New York, NY (US);
Jason Zebchuk, Toronto, CA;
Harold W. Cain, III, Katonah, NY (US);
Vijayalakshmi Srinivasan, New York, NY (US);
Jason Zebchuk, Toronto, CA;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A scheme referred to as a 'Region-based cache restoration prefetcher' (RECAP) is employed for cache preloading on a partition or a context switch. The RECAP exploits spatial locality to provide a bandwidth-efficient prefetcher to reduce the 'cold' cache effect caused by multiprogrammed virtualization. The RECAP groups cache blocks into coarse-grain regions of memory, and predicts which regions contain useful blocks that should be prefetched the next time the current virtual machine executes. Based on these predictions, and using a simple compression technique that also exploits spatial locality, the RECAP provides a robust prefetcher that improves performance without excessive bandwidth overhead or slowdown.