Michael R Hamilton

US Patent:

6701420, Mar 2, 2004

Filed:

Feb 1, 1999

Appl. No.:

09/241469

Inventors:

Michael T Hamilton - Fort Collins CO
Brett Edward Johnson - Windsor CO

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G06F 1200

US Classification:

711170, 711156, 711165, 707205

Abstract:

A memory management system and method that quickly allocates and reuses memory for storage of data, such as display lists in a graphics system. The memory manager allocates memory without information regarding the amount of memory that is to be required while minimizing system-level memory allocation calls and maximizing the contiguity of the allocated memory which is used. The memory manager acquires from system memory a memory block that is of a predetermined size that is significantly larger than the anticipated memory size required to store a display list. The memory manager allocates to the display list that portion of the acquired memory block necessary for storing the display list, maintaining control over the unused portion of the acquired memory in a memory pool of available memory for future allocation to another display list without performing subsequent system-level calls.

US Patent:

6914607, Jul 5, 2005

Filed:

Feb 8, 2003

Appl. No.:

10/361739

Inventors:

Jeffrey Joel Walls - Fort Collins CO, US
Michael T. Hamilton - Fort Collins CO, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G06F013/00
G06F015/16

US Classification:

345536, 345503, 345522, 345520, 709226

Abstract:

A data buffering apparatus comprises a plurality of sessions and buffer logic. The plurality of session are respectively associated with session identifiers. Each of the sessions is configured to identify entries in a queue having the session's associated identifier and to pull, from the queue, the identified entries. Each of the sessions is further configured to retrieve data from the buffers pointed to by the identified entries that have the session's associated identifier. The buffer logic is configured to store a set of data to one of a plurality of buffers. The buffer logic is further configured to store, in the queue, for each expected retrieval of the set of data from the one buffer by the sessions, an entry that points to the one buffer and has a different session identifier associated with a different one of the sessions.

US Patent:

7233573, Jun 19, 2007

Filed:

Feb 8, 2003

Appl. No.:

10/361878

Inventors:

Jeffrey Joel Walls - Fort Collins CO, US
Michael T. Hamilton - Fort Collins CO, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

H04L 1/00
G08C 25/02

US Classification:

370236, 370235, 370466, 714748

Abstract:

An apparatus for receiving data from a network comprises a network interface and logic. The network interface is configured to receive a sequence of data packets from a network. The logic is configured to detect when a data packet is missing from the sequence. The logic is configured to initiate at least one retransmission of the missing data packet via a first transport protocol. The logic is further configured to initiate another retransmission of the missing data packet via a second transport protocol in response to a determination that an attempt to access the missing data packet is imminent.

US Patent:

7298755, Nov 20, 2007

Filed:

Feb 8, 2003

Appl. No.:

10/361747

Inventors:

Jeffrey Joel Walls - Fort Collins CO, US
Michael T Hamilton - Fort Collins CO, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

H04L 12/28
H04L 12/56
H04L 12/26

US Classification:

370414, 370217, 370418

Abstract:

An apparatus for communicating with a network comprises a data packet pipeline and a monitoring element. The data packet pipeline is configured to transfer data between a buffer and a network socket. The monitoring element is configured to provide an indication of an operational performance parameter for at least one component of the data packet pipeline thereby enabling an operational problem within the pipeline may be isolated based on the indication.

US Patent:

7319670, Jan 15, 2008

Filed:

Feb 8, 2003

Appl. No.:

10/361738

Inventors:

Jeffrey Joel Walls - Fort Collins CO, US
Michael T Hamilton - Fort Collins CO, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

H04L 1/00
H04L 12/26
H04L 12/28
H04L 12/56

US Classification:

370236, 3702301, 370231, 370414, 370416

Abstract:

An apparatus for transmitting to a network comprises a queue, packetization logic, interface logic, and queue logic. The packetization logic is configured to packetize data into a plurality of data packets and to store, to the queue, entries pointing to the data packets. The interface logic is configured to read the entries from the queue. The interface logic, for each of the read entries, is configured to retrieve one of the packets pointed to by the read entry and to transmit the retrieved packet to a network socket. The queue logic is configured to limit, based on a number of retransmission requests detected by the queue logic, a number of entries that the packetization logic may store to the queue during a particular time period thereby controlling a transmission rate of the apparatus.

US Patent:

7330187, Feb 12, 2008

Filed:

Jul 29, 2003

Appl. No.:

10/629930

Inventors:

Kevin T. Lefebvre - Fort Collins CO, US
Don B. Hoffman - Fort Collins CO, US
Michael T Hamilton - Fort Collins CO, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G06T 15/00

US Classification:

345522, 345537, 703 2, 703 6, 715760, 715763

Abstract:

A hybrid method or apparatus for processing OpenGL display list commands. A deamon intercepts display list commands issued by a client to an OpenGL stack. Responsive to a newList [list commands] endList sequence: the daemon stores a representation of a first subset of the list commands; and creates, in the stack, a display list corresponding to a second subset of the list commands. Responsive to a callList command: the daemon issues to the stack at least one immediate mode command corresponding to the first subset of the list commands and at least one callList command invoking the display list corresponding to the second subset of the list commands. The daemon may also store a representation of an expression or function. Responsive to the callList command, the daemon may evaluate the expression or function and conditionally change the step of invoking the display list based on the outcome.

US Patent:

7373408, May 13, 2008

Filed:

Feb 8, 2003

Appl. No.:

10/361737

Inventors:

Jeffrey Joel Walls - Fort Collins CO, US
Michael T Hamilton - Fort Collins CO, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G06F 15/16

US Classification:

709227, 37039552

Abstract:

A network communication apparatus comprises an application, a plurality of communication sessions, a transport manager, and buffer logic. The application is configured to initiate a session request specifying a set of receiving units and a transport protocol. The transport manager is configured to allocate at least one of the communication sessions to the application in response to the session request. The transport manager is further configured to provide a session identifier that identifies the allocated session. The transport manager configures, based on the session request, the allocated session to communicate with the specified set of receiving units via the specified protocol. The buffer logic is configured to store data produced by the application into the shared memory accessible to each of the communication sessions and to associate the stored data with the session identifier. The allocated session is configured to retrieve the data based on the session identifier and to transmit the retrieved data through a network to the specified set of receiving units via the specified protocol.

US Patent:

7430623, Sep 30, 2008

Filed:

Feb 8, 2003

Appl. No.:

10/361742

Inventors:

Jeffrey Joel Walls - Fort Collins CO, US
Michael T Hamilton - Fort Collins CO, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G06F 3/00
G06F 15/16
H04L 12/28
H04L 12/56

US Classification:

710 52, 710 53, 710 56, 709250, 370412

Abstract:

A system for buffering data received from a network comprises a network socket, a plurality of buffers, a buffer pointer pool, receive logic, and packet delivery logic. The buffer pointer pool has a plurality of entries respectively pointing to the buffers. The receive logic is configured to pull an entry from the pool and to perform a bulk read of the network socket. The entry points to one of the buffers, and the receive logic is further configured to store data from the bulk read to the one buffer based on the entry. The packet delivery logic is configured to read, based on the entry, the one buffer and to locate a missing packet sequence in response to a determination, by the packet delivery logic, that the one buffer is storing an incomplete packet sequence. The packet delivery logic is further configured to form a complete packet sequence based on the incomplete packet sequence and the missing packet sequence.