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:
Oct. 22, 2013
Filed:
Jan. 30, 2008
John Forecast, Newton, MA (US);
Michael Evans, Upton, MA (US);
John Forecast, Newton, MA (US);
Michael Evans, Upton, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A device for providing a plurality of virtual machines utilizes a multi-core processor having a plurality of cores, each with a memory cache, and a shared memory resource in communication with the cores. The device utilizes a cooperative, multi-level scheduler. The multi-level scheduler includes a primary scheduler and a plurality of secondary schedulers, each supporting a subset of the physical cores. The primary scheduler assigns a group of threads to one of the processor cores. The secondary scheduler associated with the processor core to which the group of threads was assigned schedules execution of individual ones of the threads. The secondary scheduler also provides an indication of lock status to the primary scheduler. The lock status information can be used by the primary scheduler to avoid preempting a thread that holds a lock.