Sun Microsystems, Inc.

Terrence Barr

Peter Strarup Jensen

Darryl J Mocek

Behfar Razavi

William Finlay McWalter

Eran Davidov

Shahriar Vaghar

Shivakumar Govindarajapuram

Michael J Parks

Jamie D Riggs

David C Gurchinoff

Dianna L Decristo

Lisa M Kelly

David J Proulx

A telematics system is provided. The system includes a telematics client framework having an interface to client applications and being integrated with a client communications framework. The client communications framework has a client stream manager, a client data pump, a client policy manager, and a client channel monitor. The channel monitor detects availability of channels for communication with a telematics server framework. The telematics server framework includes an interface to server applications and is integrated with a server communications framework. The client channel monitor is configured to communicate availability of channels to connection objects of the client data pump. Switching between channels is triggered based on information obtained from the client policy manager.

Adaptive connection routing over multiple communication channels

A method for managing access to service entities (e.g., such as a devices, resources, and services, which are limited resources) is provided. The method includes requesting a priority level. In response, a priority object with an assigned priority level is returned. A service is then requested from a service manager, and the request includes data for carrying out the requested service and the priority object. The service manager is configured to identify at least one service entity that is required to carry out the requested service. Access is then requested to at least one service entity. A determination is made as to whether the at least one service entity is in-use. If at least one service entity is in-use, a further determination is made as to whether at least one service entity that is in-use has an assigned priority level that is higher than the assigned priority level, which is associated with a current request. The requester, such as a carlet, which has the higher assigned priority will gain control of the requested entity.

Manager level device/service arbitrator and methods

A method for arbitrating channel bandwidth among a plurality of logical connections desiring access over a communication channel to transmit data is provided. The method includes detecting a connection desiring access through the communication channel and assigning the connection to a group having arbitration parameters. Then, the method packetizes the data to be transmitted and transmits each packet of the data in time slices. In each time slice, data is transmitted using the arbitration parameters of the group.

Arbitration of communication channel bandwidth

A method for testing performance of a constrained resources computing device (CRCD) is provided which includes determining that a data sample was generated and generating a time stamp corresponding to when the data sample was generated. The method also includes determining a defined time interval corresponding to the time stamp and incrementing a counter associated with the defined time interval corresponding to the time stamp.

Method for collecting and reducing performance-related data in constrained environments

A test apparatus including a data interface configured to couple with at least one of a test device and a baseline device, and a computing device configured to perform a method including performing a first benchmark on a baseline device for a predetermined time interval, resulting in a first dataset representing work performed by the baseline devices, performing a second benchmark on a test device for the predetermined time interval resulting in a second dataset representing work performed by the test device, and using a heuristic including a number of tests to determine whether the test device has an acceptable level of performance relative to the baseline device.

Apparatus for comparing performance of electronic devices

A method for evaluating portable electronic devices includes performing a first benchmark on a baseline device for a predetermined time interval, resulting in a first dataset representing work performed by the baseline device. The method further includes performing a second benchmark on a test device for the predetermined time interval resulting in a second dataset representing work performed by the test device. Finally, the test device is determined to be initially acceptable if the total amount of work performed by the test device and the total amount of work performed by the baseline device differ by less than an acceptance threshold, and is determined to be finally acceptable by performing a quotient test on the data.

Method and apparatus for comparing performance of electronic devices

An invention is provided for affording asynchronous fault-tolerant and adaptive communication in a distributed computing environment. The invention includes periodically updating a stored connection state value, which is received from an application. The connection state value indicates the number of data elements processed by the application. An interruption in a digital connection is then detected on a network between two endpoints. Upon detection, the stored connection state value is exchanged with the opposite endpoint over the network. In this manner, remaining data elements of the transaction can be received sequentially over the network from the opposite endpoint. In particular, the remaining data elements begin with a data element at a point indicated by the connection state value plus one.

Method for asynchronous support of fault-tolerant and adaptive communication

An invention is provided for fault-tolerant and adaptive communication in a distributed computing environment. The invention includes detecting an interruption in a digital connection on a network between two endpoints. Upon detection, a connection state value indicating a number of data elements processed by the application is obtained. The connection state value is then exchanged with the opposite endpoint over the network. In this manner, remaining data elements of the transaction can be received sequentially over the network from the opposite endpoint. In particular, the remaining data elements begin with a data element at a point indicated by the connection state value plus one.

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Cupertino, CA, United States of America

Terrence Barr