Abstract: Methods and systems for providing a virtual network are disclosed. At least one layer of abstraction is created between network service applications and conventional network protocols by inserting an adaptive dispatcher between applications and network transport services on each machine in a network. The message protocol in the virtual network is extensible, allowing application programs to create new headers within any message as needed. The adaptive dispatcher contains handlers that route and dispatch messages within the virtual network based on arbitrary content within each message, including any combination of headers and/or data content. Each device on the virtual network has a virtual address to which messages are directed, allowing devices to move within the network without reconfiguring routing tables.

Abstract: Methods and systems for providing a virtual network are disclosed. At least one layer of abstraction is created between network service applications and conventional network protocols by inserting an adaptive dispatcher between applications and network transport services on each machine in a network. The message protocol in the virtual network is extensible, allowing application programs to create new headers within any message as needed. The adaptive dispatcher contains handlers that route and dispatch messages within the virtual network based on arbitrary content within each message, including any combination of headers and/or data content. Each device on the virtual network has a virtual address to which messages are directed, allowing devices to move within the network without reconfiguring routing tables.

Abstract: Methods and systems for providing a virtual network are disclosed. At least one layer of abstraction is created between network service applications and conventional network protocols by inserting an adaptive dispatcher between applications and network transport services on each machine in a network. The message protocol in the virtual network is extensible, allowing application programs to create new headers within any message as needed. The adaptive dispatcher contains handlers that route and dispatch messages within the virtual network based on arbitrary content within each message, including any combination of headers and/or data content. Each device on the virtual network has a virtual address to which messages are directed, allowing devices to move within the network without reconfiguring routing tables.

Abstract: A method and apparatus for analyzing the performance of a data processing system, particularly a distributed data processing system, provide a system user with tools for analyzing an application running thereon. Information about the flow and performance of the application can be specified, captured, and analyzed, without modifying it or degrading its performance or data security characteristics, even if it is distributed across multiple machines. The user interface permits the system user to filter the performance information, to set triggers which the performance analyzer is able to reduce and/or combine, to observe multiple time-synchronized displays of performance data either in real time or post mortem, and to play and re-play the operation of an automatically generated application model. The invention is implemented in part by providing suitable Application Program Interfaces (APIs) in the operating system of the data processing system.

Abstract: A method and apparatus for analyzing the performance of a data processing system, particularly a distributed data processing system, provide a system user with tools for analyzing an application running thereon. Information about the flow and performance of the application can be specified, captured, and analyzed, without modifying it or degrading its performance or data security characteristics, even if it is distributed across multiple machines. The user interface permits the system user to filter the performance information, to set triggers which the performance analyzer is able to reduce and/or combine, to observe multiple time-synchronized displays of performance data either in real time or post mortem, and to play and re-play the operation of an automatically generated application model. The invention is implemented in part by providing suitable Application Program Interfaces (APIs) in the operating system of the data processing system.

Abstract: A method and apparatus for analyzing the performance of a data processing system, particularly a distributed data processing system, provide a system user with tools for analyzing an application running thereon. Information about the flow and performance of the application can be specified, captured, and analyzed, without modifying it or degrading its performance or data security characteristics, even if it is distributed across multiple machines. The user interface permits the system user to filter the performance information, to set triggers which the performance analyzer is able to reduce and/or combine, to observe multiple time-synchronized displays of performance data either in real time or post mortem, and to play and re-play the operation of an automatically generated application model. The invention is implemented in part by providing suitable Application Program Interfaces (APIs) in the operating system of the data processing system.

Abstract: A method and apparatus for analyzing the performance of a data processing system, particularly a distributed data processing system, provide a system user with tools for analyzing an application running thereon. Information about the flow and performance of the application can be specified, captured, and analyzed, without modifying it or degrading its performance or data security characteristics, even if it is distributed across multiple machines. The user interface permits the system user to filter the performance information, to set triggers which the performance analyzer is able to reduce and/or combine, to observe multiple time-synchronized displays of performance data either in real time or post mortem, and to play and re-play the operation of an automatically generated application model. The invention is implemented in part by providing suitable Application Program Interfaces (APIs) in the operating system of the data processing system.

Abstract: A method and apparatus for analyzing the performance of a data processing system, particularly a distributed data processing system, provide a system user with tools for analyzing an application running thereon. Information about the flow and performance of the application can be specified, captured, and analyzed, without modifying it or degrading its performance or data security characteristics, even if it is distributed across multiple machines. The user interface permits the system user to filter the performance information, to set triggers which the performance analyzer is able to reduce and/or combine, to observe multiple time-synchronized displays of performance data either in real time or post mortem, and to play and re-play the operation of an automatically generated application model. The invention is implemented in part by providing suitable Application Program Interfaces (APIs) in the operating system of the data processing system.

Abstract: A method and apparatus for analyzing the performance of a data processing system, particularly a distributed data processing system, provide a system user with tools for analyzing an application running thereon. Information about the flow and performance of the application can be specified, captured, and analyzed, without modifying it or degrading its performance or data security characteristics, even if it is distributed across multiple machines. The user interface permits the system user to filter the performance information, to set triggers which the performance analyzer is able to reduce and/or combine, to observe multiple time-synchronized displays of performance data either in real time or post mortem, and to play and re-play the operation of an automatically generated application model. The invention is implemented in part by providing suitable Application Program Interfaces (APIs) in the operating system of the data processing system.

Abstract: A method and apparatus for analyzing the performance of a data processing system, particularly a distributed data processing system, provide a system user with tools for analyzing an application running thereon. Information about the flow and performance of the application can be specified, captured, and analyzed, without modifying it or degrading its performance or data security characteristics, even if it is distributed across multiple machines. The user interface permits the system user to filter the performance information, to set triggers which the performance analyzer is able to reduce and/or combine, to observe multiple time-synchronized displays of performance data either in real time or post mortem, and to play and re-play the operation of an automatically generated application model. The invention is implemented in part by providing suitable Application Program Interfaces (APIs) in the operating system of the data processing system.

Abstract: Methods and systems for providing a virtual network are disclosed. At least one layer of abstraction is created between network service applications and conventional network protocols by inserting an adaptive dispatcher between applications and network transport services on each machine in a network. The message protocol in the virtual network is extensible, allowing application programs to create new headers within any message as needed. The adaptive dispatcher contains handlers that route and dispatch messages within the virtual network based on arbitrary content within each message, including any combination of headers and/or data content. Each device on the virtual network has a virtual address to which messages are directed, allowing devices to move within the network without reconfiguring routing tables.

Abstract: Methods and systems for using a compensable network messaging protocol are disclosed. A complete set of attributes and characteristics of a messaging protocol are broken down into independent pieces, or protocolettes. When a network application sends a message across the network, the network application selects the set of services that are needed for that specific message (e.g., reliability). A code generator composes a messaging protocol using the preconstructed protocolettes, based on the network application's needs and/or request. The message is forwarded to a router, which transmits the message using the uniquely composed messaging protocol for delivery to the recipient(s).

Abstract: A method and apparatus for analyzing the performance of a data processing system, particularly a distributed data processing system, provide a system user with tools for analyzing an application running thereon. Information about the flow and performance of the application can be specified, captured, and analyzed, without modifying it or degrading its performance or data security characteristics, even if it is distributed across multiple machines. The user interface permits the system user to filter the performance information, to set triggers which the performance analyzer is able to reduce and/or combine, to observe multiple time-synchronized displays of performance data either in real time or post mortem, and to play and re-play the operation of an automatically generated application model. The invention is implemented in part by providing suitable Application Program Interfaces (APIs) in the operating system of the data processing system.

Abstract: A method and apparatus for analyzing the performance of a data processing system, particularly a distributed data processing system, provide a system user with tools for analyzing an application running thereon. Information about the flow and performance of the application can be specified, captured, and analyzed, without modifying it or degrading its performance or data security characteristics, even if it is distributed across multiple machines. The user interface permits the system user to filter the performance information, to set triggers which the performance analyzer is able to reduce and/or combine, to observe multiple time-synchronized displays of performance data either in real time or post mortem, and to play and re-play the operation of an automatically generated application model. The invention is implemented in part by providing suitable Application Program Interfaces (APIs) in the operating system of the data processing system.

Abstract: A safe general purpose virtual machine computing system having a general purpose memory protection model that is hardware architecture and programming language independent. The safe general purpose virtual machine computing system is software based to facilitate operation on hardware architectures that otherwise would prevent the exchange and successful execution of mobile code programs from one computer system to another. The safe general purpose virtual machine computing system also facilitates generating Bytecode Reduced Instruction Set Computer (BRISC) compressed mobile code that can be compiled or translated into executable code very quickly in addition to being compact for transmission purposes, and that is prevented from accessing unauthorized memory locations due to Software Fault Isolation techniques implemented in the code.

Abstract: An efficient method for implementing a safe virtual machine, in software, that embodies a general purpose memory protection model. The present invention runs on any general purpose computer architecture and will run an executable that has been developed for the virtual machine. The present invention compiles the executable into the native instructions of the hardware. During the compilation, specialized code sequences are added to the code using a technique called software fault isolation. A set of allowed behaviors and a set of responses to the undesirable actions will be created and written to memory. A series of optimizations are applied so that the translated code executes at nearly the native speed of the architecture, but the fault isolation sequences prevent it from engaging in undesirable actions. In particular, the memory protection model is enforced, providing the same level of protection that customarily requires hardware support to enforce efficiently.