Using hardware methods to improve time-predictable performance in real-time Java systems

Whitham, Jack; Audsley, Neil; Schoeberl, Martin

doi:10.1145/1620405.1620424

Cited by 8 publications

(7 citation statements)

References 20 publications

(27 reference statements)

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“…An Enclosing_Operation includes also the list of all the protected methods that may be invoked during its execution. For more details about the semantics of this element see [12]. The model of an «executorTask» method must also be established per instance.…”

Section: B Logical Modelmentioning

confidence: 99%

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Framework for the Design of Java Firm Real-time Systems Oriented to the Generation of Timing Behaviour Models

Martínez

Lanza

Drake

et al. 2013

2013 39th Euromicro Conference on Software Engineering and Advanced Applications

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This work proposes a framework for the design of complex Java firm real-time applications that run on embedded systems. The framework simplifies the real-time patterns included in the Real-Time Specification for Java (RTSJ) with the aim of systematizing the process of modelling and configuring the scheduling of real-time object-oriented applications. Moreover, with the proposed strategy, the designer of a real-time application can automatically obtain the timing behaviour model of the application, which is used to analyse and/or configure its schedulability so that it can be executed on an embedded system meeting its firm real-time requirements. The framework supports the design of applications whose real-time tasks interact asynchronously with non real-time ones.

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Section: B Logical Modelmentioning

confidence: 99%

“…Some of the mechanisms required by Java, such as virtual dispatching and dynamic memory management, are beyond the reach of current tools. A relevant effort to address this problem is presented in [12].…”

Section: Introductionmentioning

confidence: 99%

Framework for the Design of Java Firm Real-time Systems Oriented to the Generation of Timing Behaviour Models

Martínez

Lanza

Drake

et al. 2013

2013 39th Euromicro Conference on Software Engineering and Advanced Applications

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“…The semantics within ToucHMore are that the offloaded function is executed synchronously. Within a Java context, the offloaded method is a pure function (which also aids offloading of a software function to a hardware implementation of that function in hardware [12]). Also, it:…”

Section: A Customisation With the Touchmore Projectmentioning

confidence: 99%

ToucHMore toolchain and system software for energy and variability customisation

Audsley

Gray

Acquaviva

et al. 2012

2012 IEEE International High Level Design Validation and Test Workshop (HLDVT)

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Run-time platform variability presents a number of challenges to the system software in order that a run-time environment is presented to applications that sufficiently masks dynamic platform variability (including fabrication variability), whilst allowing applications to tune overall system performance to exploit key aspects of dynamic energy usage and platform variability. The approach taken within the Touchmore project is to model key aspects of the platform in order that performance and variability can be understood and exploited by the system software. In turn, the system software (comprising OS and run-time) utilises the model so that aspects of variability and energy usage are abstracted from the platform, then monitored and controlled in order to meet policy goals, eg. energy minimisation. This paper documents aspects of the modeling and system software structure to show how the Touchmore project is managing energy and platform variability using customisation of the application, system software and toolchain.

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“…Java virtual machines have been implemented in hardware many times with different design goals [19], [13], [14] indicating the plausibility of this approach. Further work has since built on JOP to enable the processor to interface with external hardware accelerators through 'hardware objects' [22] and 'hardware methods' [29]. The first abstracts hardware as objects where fields are mapped to registers in the external device, and the second interfaces with hardware by representing interaction as native methods in a similar way to the Java Native Interface (JNI) [6] in software JVMs.…”

Section: Background and Related Workmentioning

confidence: 99%

Extending Java for heterogeneous embedded system description

Plumbridge

Audsley

2011

6th International Workshop on Reconfigurable Communication-Centric Systems-on-Chip (ReCoSoC)

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This paper introduces Machine Java, a framework of classes for the Java programming language that enable the description of software for systems with heterogeneous processing elements (such as CPUs, microcontrollers and function accelerators). Intended for the behavioural description of embedded systems, Machine Java encapsulates both the data and control aspects of computation into 'machine' objects that are appropriate for mapping onto architecturally diverse multiprocessors.System descriptions in Machine Java avoid the need for a separate programming language for each processing element, and makes explicit description of communications between processors unnecessary. Suitability for a wide variety of hardware platforms is enhanced by avoiding dependence on notions of shared memory or shared timing resources.

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Using hardware methods to improve time-predictable performance in real-time Java systems

Cited by 8 publications

References 20 publications

Framework for the Design of Java Firm Real-time Systems Oriented to the Generation of Timing Behaviour Models

Framework for the Design of Java Firm Real-time Systems Oriented to the Generation of Timing Behaviour Models

ToucHMore toolchain and system software for energy and variability customisation

Extending Java for heterogeneous embedded system description

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