Learn More
An increasing number of applications are being developed using distributed object computing middleware, such as CORBA. Many of these applications require the underlying middleware, operating systems, and networks to provide end-to-end quality of service (QoS) support to enhance their efficiency, predictability, scalability, and fault tolerance. The Object(More)
Commercial off-the-shelf (COTS) distribution middleware is gaining acceptance in the distributed real-time and embedded (DRE) community. Existing COTS specifications, however, do not effectively separate quality of service (QoS) policy configurations and adaptations from application functionality. DRE application developers therefore often intersperse code(More)
Quality assurance (QA) tasks, such as testing, profiling,and performance evaluation, have historically been donein-house on developer-generated workloads and regressionsuites. Since this approach is inadequate for many systems,tools and processes are being developed to improve softwarequality by increasing user participation in the QA process.A limitation(More)
Performance-intensive software is increasingly being used on heterogeneous combinations of OS, compiler, and hardware platforms. Examples include reusable middleware that forms the basis for scientific computing grids and distributed real-time and embedded systems. Since this software has stringent quality of service (QoS) requirements, it often provides a(More)
This paper describes a technique for improving separation of concerns at the level of domain modeling. A contribution of this new approach is the construction of support tools that facilitate the elevation of crosscutting modeling concerns to first-class constructs in a type-system. The key idea is the application of a variant of the OMG Object Constraint(More)
This paper presents three contributions to the challenges of applying the OMG Model Driven Architecture (MDA) to develop and deploy distributed real-time and embedded (DRE) applications. First, we motivate our MDA tool called CoSMIC, which is based on the Model Integrated Computing (MIC) paradigm that provides the intellectual foundation for MDA. Second, we(More)
The Object Management Group (OMG) has adopted the Model Driven Architecture (MDA) to standardize the integration of the modeling and simulation paradigm with middleware technology platforms. The MDA defines platform-independent models (PIMs) and platform-specific models (PSMs) that streamline platform integration issues and protect investments against the(More)
Feedback control real-time scheduling (FCS) aims at satisfying performance specifications of real-time systems based on adaptive resource management. Existing FCS algorithms often rely on the existence of continuous control variables in real-time systems. A number of real-time systems, however, support only a finite set of discrete configurations that limit(More)
In today's competitive, fast-paced computing industry, successful software must increasingly be: (1) extensible to support successions of quick updates and additions to address new requirements and take advantage of emerging markets; (2) flexible to support a growing range of multimedia data types, traffic flows, and end-to-end QoS (quality of service)(More)