Eric Y Cheng

US Patent:

6769071, Jul 27, 2004

Filed:

Jan 23, 2001

Appl. No.:

09/768859

Inventors:

Eric Cheng - San Ramon CA
Yafu Ding - Milpitas CA
Chang-Tying Wu - San Jose CA

Assignee:

Adaptec, Inc. - Milpitas CA

International Classification:

G06F 1100

US Classification:

714 4, 714 26

Abstract:

A invention is disclosed that provides intelligent failover in a multi-path computer system. Initially, a plurality of data paths to a computer input/output (I/O) device is provided, wherein the plurality of data paths to the computer I/O device are represented as a single logical computer I/O device. Then, during operation, an I/O request to access the computer I/O device is intercepted. A data path from the plurality of data paths to the computer I/O device is then selected, and the computer I/O device is accessed using the selected data path.

US Patent:

6802021, Oct 5, 2004

Filed:

Jan 23, 2001

Appl. No.:

09/768957

Inventors:

Eric Cheng - San Ramon CA
Yafu Ding - Milpitas CA
Chang-Tying Wu - San Jose CA

Assignee:

Adaptec, Inc. - Milpitas CA

International Classification:

G06F 1100

US Classification:

714 4, 710316

Abstract:

An invention is disclosed for intelligent load balancing in a mult-path computer system. Initially, an input/output (I/O) request to access the computer I/O device is intercepted. Then, to properly balance data path traffic, the number of I/O requests that have been sent along each data path of a plurality of data paths providing access to the computer I/O device is detected, and a failure probability is calculated for each data path paths based on the number of I/O requests that have been sent along each data path. A data path is then selected that has a failure probability lower than the failure probability of other data paths of the plurality of data paths and the computer I/O device is accessed using the selected data path.

US Patent:

6823477, Nov 23, 2004

Filed:

Jan 23, 2001

Appl. No.:

09/768860

Inventors:

Eric Cheng - San Ramon CA
Yafu Ding - Milpitas CA
Chang-Tying Wu - San Jose CA

Assignee:

Adaptec, Inc. - Milpitas CA

International Classification:

G06F 1100

US Classification:

714 26, 714 4, 714 3, 710316

Abstract:

An invention is disclosed for a segregated user interface for parameter configuration in a multi-path failover system. The segregated user interface includes a user interface module capable of receiving configuration parameters for the multi-path failover system from a user. Further included is an object module that is capable of receiving the configuration parameters from the user interface module. The object module provides functionality and can detect the current controller status of controllers and the current device status of devices. In addition, the object module is capable of configuring a failover driver using the configuration parameters received from the user interface module.

US Patent:

7167999, Jan 23, 2007

Filed:

Oct 27, 2004

Appl. No.:

10/975275

Inventors:

Eric Cheng - San Ramon CA, US
Yafu Ding - Milpitas CA, US
Chang-Tying Wu - San Jose CA, US

Assignee:

Adaptec, Inc. - Milpitas CA

International Classification:

G06F 11/00

US Classification:

714 4, 710316

Abstract:

An invention is disclosed for a segregated user interface for parameter configuration in a multi-path failover system. The segregated user interface includes a user interface module capable of receiving configuration parameters for the multi-path failover system from a user. Further included is an object module that is capable of receiving the configuration parameters from the user interface module. The object module provides functionality and can detect the current controller status of controllers and the current device status of devices. In addition, the object module is capable of configuring a failover driver using the configuration parameters received from the user interface module.

US Patent:

7472311, Dec 30, 2008

Filed:

Oct 14, 2005

Appl. No.:

11/251360

Inventors:

Hsiao-Keng J. Chu - Palo Alto CA, US
Eric T. Cheng - San Mateo CA, US
Sunay Tripathi - San Jose CA, US

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

G06F 11/00

US Classification:

714 30, 714 28, 703 23

Abstract:

One embodiment of the present invention provides a system that can test an interface between a TCP (Transmission Control Protocol) Offload Engine (TOE) and an OS (Operating System) that has a TCP software stack. Note that the TOE is a specialized integrated circuit which allows TCP-related computations to be offloaded from the processor that executes the OS. During operation, the system receives a request from the OS to perform a TCP-related computation on the TOE, wherein the TCP-related computation is associated with a portion of the TCP software stack. The system then performs the TCP-related computation by executing the portion of the TCP software stack on a processor, which can either be the same as the one that is executing the OS, or it can be a different processor. Note that performing the TCP-related computation on a processor, instead of the TOE, allows the interface between the TOE and the OS to be tested without requiring an actual TOE chip.

US Patent:

7502395, Mar 10, 2009

Filed:

Aug 8, 2006

Appl. No.:

11/500661

Inventors:

Eric Chiu-Tat Cheng - Torrance CA, US
Robert Rex Rice - Simi Valley CA, US
Michael Gordon Wickham - Rancho Palos Verdes CA, US
Mark Ernest Weber - Hawthorne CA, US

Assignee:

Northrop Grumman Space & Mission Systems Corp. - Los Angeles CA

International Classification:

G01B 9/02
H01S 3/13

US Classification:

372 32, 356477

Abstract:

A pulsed coherent fiber array laser system that includes a beam generating sub-system that provides a signal pulse beam having pulses of the desired duration that is split into several fiber channels. Optical leakage between the pulses in each split beam is measured and locked to a reference beam by a phase sensing circuit and phase adjusters so that the phase of each fiber pulsed beam is aligned with the phase of the reference beam. A pulse clipper or filter is employed to remove the pulses in the fiber beams so that they do not saturate the phase sensing circuit. The beam generating sub-system can employ any suitable combination of devices to generate the signal beam and the reference beam, including continuous wave master oscillators, amplitude modulators, frequency shifters, injection seed oscillators, Q-switched lasers, reference oscillators, frequency lockers, wavelength division multiplexers, time gated switches, etc.

US Patent:

7779132, Aug 17, 2010

Filed:

Nov 14, 2005

Appl. No.:

11/274600

Inventors:

Hsiao-Keng J. Chu - Palo Alto CA, US
Darrin P. Johnson - Mountain View CA, US
Eric T. Cheng - San Mateo CA, US

Assignee:

Oracle America, Inc. - Redwood Shores CA

International Classification:

G06F 15/173
G06F 15/16

US Classification:

709227, 709223, 709228

Abstract:

One embodiment of the present invention provides a system for communicating data using a socket interface with multiple transport layer implementations. During operation the system creates a socket which can be used with a set of transport layer implementations. Next, the system binds the socket to a local port without specifying a particular transport layer implementation. The system then receives a request to connect to a target port that is associated with a target address. Next, the system selects a protocol implementation from the set of transport layer implementations using the target port and the target address. The system then sends a connection request to the target port using the selected protocol implementation. Note that the present invention does not require changing a networking application because the transport layer implementation is selected automatically by the system, instead of requiring the application to possess the knowledge to select the appropriate transport layer implementation.

US Patent:

7843821, Nov 30, 2010

Filed:

Dec 21, 2006

Appl. No.:

11/644561

Inventors:

Rajagopal Kunhappan - Fremont CA, US
Kais Belgaied - Sunnyvale CA, US
Eric T. Cheng - San Mateo CA, US

Assignee:

Oracle America, Inc. - Redwood Shores CA

International Classification:

G01R 31/08
G06F 11/00
G06F 9/455
G06F 15/16
G06F 9/26
G06F 9/34
G08C 15/00
H04J 1/16
H04J 3/14
H04L 1/00
H04L 12/26
H04L 12/28
H04L 12/56

US Classification:

370230, 370409, 703 23, 709229, 711203

Abstract:

Apparatus, methods and computer program products are disclosed for specifying a MAC identifier for a network-interface-device that includes multiple universally administered MAC identifiers and connects to a network through a port. The network-interface-device accepts data packets received through the port if the data packets contain a destination address that matches any active MAC identifier. The method includes reserving a first and second universally administered MAC identifiers from the available universally administered MAC identifiers. The first universally administered MAC identifier and the second universally administered MAC identifier are respectively associated with a first and second resource of the network-interface-device. The MAC identifier is assigned to one of the first or second resource and activated. Other aspects include apparatus logics and program products that perform the method.