this paper describes a preliminary investigation into the effect of multicore technology on the performance of real-time systems. In particular, it investigates the impact of varying the number of cores on multitaskin...
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this paper describes a preliminary investigation into the effect of multicore technology on the performance of real-time systems. In particular, it investigates the impact of varying the number of cores on multitasking performance and on different task configurations. Experimental results are presented for a real-time game application executing with several different hardware and software configurations.
Currently, the real-time Specification for Java (RTSJ) is silent on multiprocessor issues It attempts not to preclude multiprocessor implementations but provides no direct support. this paper discusses the issues that...
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Currently, the real-time Specification for Java (RTSJ) is silent on multiprocessor issues It attempts not to preclude multiprocessor implementations but provides no direct support. this paper discusses the issues that need to be addressed if the RTSJ is to be better defined for execution on a multiprocessor system. It proposes new dispatching and allocation models. Issues of cost enforcement, interrupts affinity and processor failure are covered.
In object-orientedreal-timecomputing scenarios, particularly where Corba is used in embedded systems with resource constraints, developers and system architects often utilize Corba object references as authorization...
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In object-orientedreal-timecomputing scenarios, particularly where Corba is used in embedded systems with resource constraints, developers and system architects often utilize Corba object references as authorization tokens. this paper investigates the security of this method in principle, and it presents the results of the analysis of the work and computing effort necessary for a potential attacker to fabricate Corba object references to existing objects for the purpose of illegitimately gaining access to these objects at the instance of seven widely used Corba products
In this paper, we propose a method to verify software executed on RTOS which conforms to mulTRON with a model checking tool Spin. the RTOS provides facilities such as priorities and service calls to control the execut...
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ISBN:
(纸本)9780769531328
In this paper, we propose a method to verify software executed on RTOS which conforms to mulTRON with a model checking tool Spin. the RTOS provides facilities such as priorities and service calls to control the execution of tasks, however, Spin does not provide them. thus, we implemented a middleware which allows us to use the facilities and simulate the execution of the tasks in Spin. the paper shows how it is implemented and its evaluation.
In this paper we present a new approach to distribute tasks connected by causal dependencies within a heterogeneous environment, e.g. several resources communicating with each other or a processor grid. Our approach u...
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In this paper we present a new approach to distribute tasks connected by causal dependencies within a heterogeneous environment, e.g. several resources communicating with each other or a processor grid. Our approach uses an artificial hormone system for task distribution which is able to meet real-time constraints. Several enhancements of the artificial hormone system are made such as partial suppressing of tasks and distributed task termination.
Several real-time executable software specification languages and techniques exist. However, there are aspects among these languages that are preventing these languages from being widely accepted and adopted. the pape...
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ISBN:
(纸本)9780769531328
Several real-time executable software specification languages and techniques exist. However, there are aspects among these languages that are preventing these languages from being widely accepted and adopted. the paper identifies three key areas contributing to this non-acceptability. the paper also suggests future directions and advancements needed in the identified areas.
the real-time specification for Java extends the Java platform to support real-time processing and introduces a region-based memory model, called scoped memory, which side-steps the Java garbage collector. While scope...
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ISBN:
(纸本)9780769531328
the real-time specification for Java extends the Java platform to support real-time processing and introduces a region-based memory model, called scoped memory, which side-steps the Java garbage collector. While scoped memory succeeds in protecting real-time tasks from execution time jitter, practical experience points to shortcomings. this paper takes stock of the state of the art in memory management for RTSJ programs.
Several approaches for scalable interest management (IM) within real-timedistributed virtual environments (DVEs) have been proposed based upon some division of the data-space in to disjoint volumes or cells. Any such...
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ISBN:
(纸本)9780769531328
Several approaches for scalable interest management (IM) within real-timedistributed virtual environments (DVEs) have been proposed based upon some division of the data-space in to disjoint volumes or cells. Any such approach, however, must implement some mechanism for propagating the query and update messages around the distributed system. the efficiency of this process can greatly effect the scalability of such systems. In this paper we evaluate an adaptive approach to this problem.
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