Eric Robert Christensen

US Patent:

6366946, Apr 2, 2002

Filed:

Dec 16, 1998

Appl. No.:

09/213016

Inventors:

Eric R. Christensen - Redmond WA

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 900

US Classification:

709106, 707 8

Abstract:

A technique for processing a critical code section which cannot be executed concurrently by more than one executable unit (e. g. , a thread, a process, a fiber, etc. ). A first executable unit prepares a packet containing a âwork request,â which describes work to be performed by the critical section. If the critical section is not in use by a second executable unit, then the first executable unit enters the critical section and performs the work described in the packet. If the critical section is in use by a second executable unit, then the second executable unit performs the work described in the packet on behalf of the first executable unit, thereby alleviating the necessity for the first executable unit to enter the critical section. In addition to the work request, the packet may also contain: a status indicating whether the work request has been performed, an event to be signaled upon completion of the work request, and/or a list pointer that may be used to link packets together in a linked list.

US Patent:

6408313, Jun 18, 2002

Filed:

Dec 16, 1998

Appl. No.:

09/212173

Inventors:

David G. Campbell - Redmond WA
Eric R. Christensen - Redmond WA

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 1730

US Classification:

707205, 711118, 711170

Abstract:

A dynamic cache management mechanism determines the amount of memory available from a system on which a memory intensive application is running and dynamically manages the amount of cache for which real memory is associated or committed by the system. A background thread periodically queries the operating system to determine how much memory is available for use by applications. If the amount of memory, as identified in a free list is above a predetermined threshold, the application requests more memory for its use. If below the predetermined threshold, the application gives memory back to the operating system. The threshold used by the application to expand and shrink the memory it uses based upon system demand for memory.

US Patent:

7765361, Jul 27, 2010

Filed:

Nov 21, 2006

Appl. No.:

11/562053

Inventors:

Robin Dhananjay Dhamankar - Redmond WA, US
Vishal Kathuria - Woodinville WA, US
Sethu Kalavakur - Redmond WA, US
Gayathri Venkataraman - Redmond WA, US
Avraham Levy - Seattle WA, US
Hanumantha Rao Kodavalla - Sammamish WA, US
Chunjia Li - Issaquah WA, US
Eric Ray Christensen - Redmond WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 12/16

US Classification:

711135, 711113

Abstract:

To ensure that logs representative of data changes are durably written, localized storage media cache is flushed to force a write to stable storage. Log sequence number tracking is leveraged to determine if log data in a localized storage media cache is likely to have not been written to durable storage. When this condition is likely, a FLUSH_CACHE command is issued to a storage media controller to force a durable write. This allows recovery of data changes to a transactional system even when its associated storage media does not provide write-ordering guarantees. Moreover, flushing of the storage media cache can be accomplished at a frequency that provides an upper bound on a maximum time between a transaction commit and data being made durable.

Address:

10215 64 Pl W, Mukilteo, WA 98275

VIN:

2GTEK13M271584498

Make:

GMC

Model:

SIERRA 1500

Year:

2007