This paper analyses the effectiveness of a hybrid multiprocessing/multicomputing architecture that is based upon a single-board-computer multiprocessor (SBCM) architecture. Based upon empirical analysis using discrete event simulations and Monte Carlo techniques, this hybrid architecture, called the enhanced single-board-computer multiprocessor (ESBCM), is shown to have improved performance and...

The current trend of using multiprocessor computers for server applications require operating system adaptations to take advantage of more powerful hardware. However, modifying large bodies of software is very costly and time-consuming, and the cost of porting an operating system to a multiprocessor might not be motivated by the potential performance benefits. In this paper we present a novel m...

This paper describes the development and use of recursively generated multithreaded process modules for process scheduling evaluation purposes. For this purpose specific executable modules were developed emulating in this way different computation-intensive workloads in Linux operating system and virtual environments such as User Mode Linux. An extensive number of iterative simulation tests hav...

Ideally, the most meaningful learning experience for students in an undergraduate OS course would be to develop fully-functional OS’s on their own. This can be accomplished using μMPS, a hardware simulator for a pedagogically undergraduate-appropriate hardware architecture, along with Kaya, a specification for a multi-layer OS supporting multiprocessing, VM, thread synchronization, external dev...

A multiprocessing system composed of identical units is considered. This system is executing a set of partially ordered tasks, with known execution times, using a non-preemptive scheduling strategy. Lower bounds on the number of processors required to compute the tasks before a deadline, and on the minimum time to execute the tasks with a fixed number of processors, are of great value for the d...

Thus, the information below describes substantive capabilities and benefits that are exemplified by the selected application areas and problems addressed. None have been empirically demonstrated in commercial products. Naturally, the specific commercial benefits for each Boundary Math commercial research application are highly sensitive to the technical and marketing context they are embedded i...

Adam is an experimental language derived from Ada. it was developed to facilitate study of issues in Ada implementation. The two primary objectives which motivated the development of Adam were. to program supervisory packages for multitask scheduling, and to formulate algorithms for compilation of Ada tasking. Adam Is a subset of the sequential program constructs of Ada combined with a set of p...

This paper examines the argument for dataflow architectures in “Two Fundamental Issues in Multiprocessing[5].” We observe two key problems. First, the justification of extensive multithreading is based on an overly simplistic view of the storage hierarchy. Second, the local greedy scheduling policy embodied in dataflow is inadequate in many circumstances. A more realistic model of the storage h...

Traffic monitoring and analysis based on general purpose systems with high speed interfaces, such as Gigabit Ethernet and 10 Gigabit Ethernet, requires carefully designed software in order to achieve the needed performance. One approach to attain such a performance relies on deploying multiple processors. This work analyses some general issues in multiprocessor systems that are particularly cri...