Oracle International Corporation

Bea Systems, Inc.

Marcus Lagergren

Mikael Vidstedt

Patrik Torstensson

Staffan Friberg

Attila Szegedi

Patrik Tortensson

A system and method for reconfiguring a virtual server image suitable for cloud deployment. In accordance with an embodiment, the system comprises providing a virtual server image, which can be executed on one or a plurality of hypervisors, and which contains a bootable part of a virtual machine, a non-bootable part of the virtual machine, a software application code for a software application, and a software application data for the software application. Information in a virtual server image patch can be used to reconfigure the contents of the virtual server image from its original content to a reconfigured content, to create a reconfigured virtual server image. In a particular embodiment, the virtual machine can be a Java Virtual Machine.

System and method to reconfigure a virtual machine image suitable for cloud deployment

Optimistically type assumptions in a dynamically typed language may involve a compiler parsing code and detecting a program element that results from an operation of the code that has an unspecified type. In response, the compiler may make a first type assumption treating the element as a first type. The assumed type may be selected from multiple types as expected to have a lowest performance cost of the multiple types. The compiler may generate compiled code using the first (assumed) type. During runtime of the compiled code, it may be detected that the first type assumption is invalid for the compiled code and in response a portion of the compiled code may be replaced with other compiled code. The other compiled code may treat the element according to a second type assumption that may be selected as a type expected to have the second lowest performance cost.

Optimistically assuming types in a dynamically typed language

A system and method to convert a software application, such as a Java application into a virtual server image that is suitable for cloud deployment. In accordance with an embodiment, the system and method allows for building a hypervisor appliance containing a virtual machine running an application. In particular, the hypervisor appliance can be compatible with any hypervisor for server virtualization and the application virtual machine can be a Java Virtual Machine (JVM).

System and method for creating or reconfiguring a virtual server image for cloud deployment

A system and method for redundant array copy removal in a virtual machine (VM), or other runtime environment, and particularly for use in a system that includes a Java Virtual Machine (JVM). In pointer free languages array copy operations are common and time consuming. Embodiments of the present invention enable the compiler to detect situations where the compiled code can safely use the source array as the destination array without performing any copy operation. By avoiding array copy operations, the performance of the application is improved.

System and method for redundant array copy removal in a pointer-free language

System and method for converting a Java application into a virtual server image for cloud deployment

A system and method for partial object dematerialization within a virtual machine (VM), and particularly Java Virtual Machines. In accordance with an embodiment, the system allows for applying partial object dematerialization to situations where the object is either created locally, or is retrieved from external code where it might have already escaped. In accordance with an embodiment, the system comprises a computer; a virtual machine for executing a software application; memory space for the application byte code and the generated machine code; and a compiler with an object dematerializer, and dematerializer injector. Runtime partial object dematerialization code is injected into the intermediate code representation in such a way that additional or standard optimizer techniques can be applied to it.

System and method for using partial software object dematerialization in a virtual machine

A system and method for early platform dependency preparation of intermediate code representation during bytecode compilation in a virtual machine (VM), or other runtime environment, and particularly for use in a system that includes a Java Virtual Machine (JVM). Current techniques for separating the platform dependent intermediate representation from the platform independent intermediate representation using a watertight abstraction layer gives non-optimal side effects (such as compiler source code duplication or inefficiency in the generated code). Embodiments of the present invention enable the compiler to construct platform dependent idioms using medium level intermediate code, and maintain the platform dependent construct all the way to the final native code.

System and method for early platform dependency preparation of intermediate code representation during bytecode compilation

A system and method for efficient string concatenation in a virtual machine (VM), or other runtime environment, and particularly for use in a system that includes a Java Virtual Machine (JVM). An embodiment improves the performance of string concatenation significantly by analysing the string concatenation chains during bytecode compilation and replacing the dynamic string concatenation code with fixed size structures without bounds checks or locks. The resulting code is also more suitable for inlining.

System and method for efficient string concatenation in a virtual machine environment

A system and method for generation of efficient calls from compiled byte code within a virtual machine (VM) or Java Virtual Machine (JVM) environment. Current techniques used to interface dynamically compiled byte code with native libraries using stubs are unsatisfactory due to non-optimal performance and the large amount of manual work needed to maintain the stub generation code. An embodiment of the present invention addresses this by providing a system and a method for automatic stub generation based on a small set of parameters stored in a ParamInfo structure. In accordance with an embodiment, the system comprises a computer with native libraries; a virtual machine for executing a software application; a memory space for the compiled byte code; and a compiler with a calling convention adaptor that integrates native calls into the high level analysis step of the compilation of byte codes, so that the overhead for the native call is reduced.

System and method for efficiently generating native code calls from byte code in virtual machines

A system and method for iterative code optimization using adaptive or dynamic size metrics, for use with run-time software systems and virtual machines. The dynamic size metric may be calculated both for a set of predetermined factors (together with associated weights), and also for a set of variable factors determined during the runtime code introspection process. The predetermined factors, and their associated weights, may be varied to reflect the overall performance of the code in each optimization instance.

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Stockholm, Sweden

Marcus Lagergren