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:
Apr. 01, 2014
Filed:
Oct. 15, 2010
Matthew Accapadi, Austin, TX (US);
Robert H. Bell, Jr., Austin, TX (US);
Hong Lam Hua, Austin, TX (US);
Ram Raghavan, Austin, TX (US);
Mysore Sathyanarayana Srinivas, Austin, TX (US);
Matthew Accapadi, Austin, TX (US);
Robert H. Bell, Jr., Austin, TX (US);
Hong Lam Hua, Austin, TX (US);
Ram Raghavan, Austin, TX (US);
Mysore Sathyanarayana Srinivas, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method, system and computer-usable medium are disclosed for managing prefetch streams in a virtual machine environment. Compiled application code in a first core, which comprises a Special Purpose Register (SPR) and a plurality of first prefetch engines, initiates a prefetch stream request. If the prefetch stream request cannot be initiated due to unavailability of a first prefetch engine, then an indicator bit indicating a Prefetch Stream Dispatch Fault is set in the SPR, causing a Hypervisor to interrupt the execution of the prefetch stream request. The Hypervisor then calls its associated operating system (OS), which determines prefetch engine availability for a second core comprising a plurality of second prefetch engines. If a second prefetch engine is available, then the OS migrates the prefetch stream request from the first core to the second core, where it is initiated on an available second prefetch engine.