Eric W 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:

7515596, Apr 7, 2009

Filed:

Jun 30, 2006

Appl. No.:

11/480069

Inventors:

Sunay Tripathi - San Jose CA, US
Nicolas G. Droux - Rio Rancho NM, US
Eric T. Cheng - San Mateo CA, US

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

H04L 12/28
H04L 12/66

US Classification:

370401, 370419, 370463

Abstract:

A system for processing a packet, including a network interface card (NIC), including a plurality of hardware receive rings, a classifier configured to classify the packet and send the packet to one of the plurality of hardware receive rings, and a host, operatively connected to the NIC, including a virtual network stack including a virtual serialization queue, a virtual network interface card (VNIC) associated with the virtual serialization queue, a device driver associated with the VNIC and configured to store a function pointer and a token associated with one of the plurality of hardware receive rings, where the VNIC is configured to perform at least one selected from a group consisting of enabling bypass mode and disabling bypass mode by changing the function pointer stored in the device driver, where the function pointer is used to send the packet to the virtual serialization queue if the bypass mode is enabled.

US Patent:

7591011, Sep 15, 2009

Filed:

Apr 22, 2005

Appl. No.:

11/112947

Inventors:

Nicolas G. Droux - San Jose CA, US
Sunay Tripathi - San Jose CA, US
Eric T. Cheng - San Mateo CA, US

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

G06F 9/00
G06F 15/16
G06F 17/00

US Classification:

726 13, 380200

Abstract:

A computing system is configured to receive incoming packets at a first priority designated for use when receiving packets that are not associated with specific subscription levels. Incoming packets are examined to determine whether they are associated with a particular subscription level. Responsive to a determination that a given packet received over a particular connection is associated with a particular subscription level, the computing system is reconfigured to process packets subsequently received over the same connection at a different priority associated with the particular subscription level.

US Patent:

7675920, Mar 9, 2010

Filed:

Apr 22, 2005

Appl. No.:

11/112228

Inventors:

Nicolas G. Droux - San Jose CA, US
Sunay Tripathi - San Jose CA, US
Eric T. Cheng - San Mateo CA, US

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

H04L 12/28

US Classification:

3703955, 37039541, 37039542, 37039521

Abstract:

A system that includes a network interface for receiving a packets from a network, a classifier operatively connected to the network interface that analyzes each of the packets and determines to which temporary data structure to forward each of packets, wherein the classifier analyzes each packet to determine with which of a plurality of protocols the packet is associated with. Each temporary data structure within the system is configured to receive packets from the classifier, wherein each of the temporary data structures is associated with at least one virtual serialization queue and wherein each of the temporary data structures is configured to store packets associated with at least one of the plurality of protocols. The at least one virtual serialization queue is configured to queue packets from the one of the temporary data structures associated with the at least one virtual serialization queue.