Allen E Marshall

US Patent:

7228444, Jun 5, 2007

Filed:

Jan 30, 2006

Appl. No.:

11/342502

Inventors:

William J. Westerinen - Issaquah WA, US
Jason M. Anderson - Snoqualmie WA, US
Allen Marshall - Woodinville WA, US
Tony D. Pierce - Bellevue WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 1/30
G06F 1/28
G06F 1/26
H02J 7/35

US Classification:

713300, 713320, 713324, 713330, 713340, 713321, 713323, 307 66

Abstract:

A mechanism is provided for a personal computer to preserve user and system state data in the event of an AC power failure when the computer is in a standby state. When the AC power failure occurs, a switchover circuit connects a rechargeable energy storage medium, such as a rechargeable battery, to the power supply of the computer for powering components of computer, and the computer is awaken. A critical battery alarm is then issued to trigger the operating system of the computer to perform a transition into a hibernation state, during which the state data of the computer are persistently stored. The energy storage medium is disconnected from the power supply after the computer system has entered hibernation.

US Patent:

8392917, Mar 5, 2013

Filed:

Mar 30, 2009

Appl. No.:

12/414374

Inventors:

Shuvabrata Ganguly - Seattle WA, US
Jason S. Wohlgemuth - Duvall WA, US
Allen Marshall - Woodinville WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 9/455
G06F 9/46

US Classification:

718 1

Abstract:

A computing system in which a software component executing on a platform can reliably and efficiently obtain state information about a component supported by the platform through the use of a shared memory page. State information may be supplied by the platform, but any state translation information needed to map the state information as supplied to a format as used may be provided through the shared page. In a virtualized environment, the state translation information can be used to map the value of a virtual timer counter or other component from a value provided by a virtual processor to a normalized reference time that will yield the same result, regardless of whether the software component is migrated to or from another virtual processor. Use of a shared page avoids the inefficiency of an intercept into a virtualized environment or a system calls in native mode operation.

US Patent:

8635057, Jan 21, 2014

Filed:

Mar 30, 2009

Appl. No.:

12/414424

Inventors:

Shuvabrata Ganguly - Seattle WA, US
Jason S. Wohlgemuth - Duvall WA, US
Allen Marshall - Woodinville WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 9/455

US Classification:

703 27

Abstract:

A computing system in which a software component executing on a platform can reliably and efficiently obtain state information about a component supported by the platform through the use of a shared memory page. State information may be supplied by the platform, but any state translation information needed to map the state information as supplied to a format as used may be provided through the shared page. In a virtualized environment, the state translation information can be used to map the value of a virtual timer counter or other component from a value provided by a virtual processor to a normalized reference time that will yield the same result, regardless of whether the software component is migrated to or from another virtual processor. Use of a shared page avoids the inefficiency of an intercept into a virtualized environment or a system calls in native mode operation.