Tracking current time on multiprocessor hosts and virtual...

Details Tracking current time on multiprocessor hosts and virtual... Tracking current time on multiprocessor hosts and virtual...

2011-01-11

2011-01-11

Suryawanshi, Suresh K (Department: 2115)

Electrical computers and digital processing systems: support

Synchronization of plural processors

C713S400000, C709S248000

Reexamination Certificate

active

07870411

ABSTRACT:
An operating system in a virtual environment can obtain the current time of the processor that the OS is utilizing through a method for synchronizing timers on multiple processors with a standard reference time, such as the Coordinated Universal Time (UTC). A hypervisor controlling the processors obtains a number of synchronization values that, together with a local timer counter value, are utilized by the guest operating system to determine the physical processor time.

REFERENCES:
patent: 5636373 (1997-06-01), Glendening et al.
patent: 6446254 (2002-09-01), Chapman et al.
patent: 6785886 (2004-08-01), Lim et al.
patent: 7023816 (2006-04-01), Couillard
patent: 7058838 (2006-06-01), Xu
patent: 7084810 (2006-08-01), Kitatani
patent: 7310721 (2007-12-01), Cohen
patent: 7487229 (2009-02-01), Ohly
patent: 7512826 (2009-03-01), Armstrong et al.
patent: 2002/0078243 (2002-06-01), Rich et al.
patent: 2004/0003123 (2004-01-01), Kwon
patent: 2004/0128555 (2004-07-01), Saitoh et al.
patent: 2005/0097298 (2005-05-01), Cohen
patent: 2005/0160151 (2005-07-01), Rawson
patent: 2006/0047974 (2006-03-01), Alpern et al.
patent: 2006/0095689 (2006-05-01), Peinado et al.
patent: 2006/0117169 (2006-06-01), Peinado et al.
patent: 2006/0190752 (2006-08-01), Lee
patent: 2007/0006226 (2007-01-01), Hendel
patent: 2007/0179955 (2007-08-01), Croft et al.
patent: 2008/0244301 (2008-10-01), Shih
International Search Report for PCT/US07/16205 (Jun. 19, 2008), 1 page.
Written Opinion for PCT/US07/16205 (Jun. 19, 2008), 3 pages.
International Search Report for PCT/US07/16205 (Jun. 2008).
Written Opinion for PCT/US07/16205 (Jun. 2008).
International Search Report for PCT/US07/14309 (Aug. 2008).
Written Opinion for PCT/US07/14309 (Aug. 2008).
Office Action for U.S. Appl. No. 11/487945 (Jun. 20, 2008).

Affiliated with

Also associated with

Rating

Tracking current time on multiprocessor hosts and virtual... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tracking current time on multiprocessor hosts and virtual..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tracking current time on multiprocessor hosts and virtual... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2704226