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. 08, 2014
Filed:
Aug. 24, 2009
Christophe DE Dinechin, Valbonne, FR;
Karen Lee Noel, Pembroke, NH (US);
Jonathan Ross, Woodinville, WA (US);
Christophe De Dinechin, Valbonne, FR;
Karen Lee Noel, Pembroke, NH (US);
Jonathan Ross, Woodinville, WA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A system and corresponding method virtualizes a real-time clock in the presence of a time-disrupting event. The real-time clock is used with physical machines and includes a single time source within each of the physical machines. The system is implemented in one or more programmable devices, which may be hardware and/or software devices, or a combination of hardware and software devices. The physical machines include one or more virtual machines. The system includes an offset module that determines a time difference offset between a virtual interrupt timer counter (ITC) associated with a virtual machine and a physical interrupt timer counter (ITC) associated with a physical machine. The system also includes a virtual machine monitor that computes one or more first time adjustments based on the offset and applies the adjustments to eliminate at least a first part of the offset.