Next-generationhard real-time systemswill require new, flexible functionality and guaranteed, predictable performance. This paper describes the UMass Spring threads package, designed specifically for multiprocessing in dynamic, hard real-time environments. This package is unique because of its support for new thread semantics for real-time processing. Predictable creation and execution of threa...

This paper examines implementation techniques for future generations of microprocessors. While the wide superscalar approach, which issues 8 and more instructions per cycle from a single thread, fails to yield a satisfying performance, its combination with techniques that utilize more coarse-grained parallelism is very promising. These techniques are multithreading and multiprocessing. Multi-th...

We are dealing here with the parallelization of fire spreading simulations following detailed physical experiments. The proposal presented in this paper has been tested and evaluated in collaboration with physicists to meet their requirements in terms of both performance and precision. For this purpose, an object-oriented framework using two abstraction levels has been developed. A first level ...

The concept of multimedia metacomputing involves the formation of a large scale loosely coupled multiprocessing environment capable of performing complex transformations on media objects. The transformations are provided in the form of operations integrated in special media processing components. The components are described by signatures that denote the runtime environments required for compon...

This paper details our current research project on the efficient utilization of many-core systems by utilizing applications based on a novel kind of software pipelines. These pipelines form malleable applications that can change their degree of parallelism at runtime. This allows not only for a well-balanced load, but also for an efficient distribution of the cores to the individual, competing ...

A virtualized multi-core environment is a multi-core machine running virtual machines with multiple virtual cpus. Previous research has demonstrated that the performance of multi-threaded, disk intensive, and network intensive applications in such an environment can be greatly improved by correctly tuning certain simple multiprocessing related system parameters like cpu affinity and interrupt a...

Embedded signal processing system designers need to be able to prototype their designs quickly and validate them early. This must be done in a manner that avoids premature commitment to the implementation target, especially when that target includes costly COTS parallel multiprocessing hardware. A new specification and design methodology known as MAGIC enables the designer to move from an execu...

Unfortunately, current introspection mechanisms usually impose a high performance overhead or are difficult for programmers to use. For example, a 1000x slowdown using Valgrind for application debugging is not uncommon, and the lack of precise instruction counters has complicated research in deterministic multiprocessing [1, 7, 2]. However, with careful hardware support, introspection can be ma...

Conventional processing infrastructures have been challenged by huge demand of stream-based applications. The industry responded by introducing traditional stream processing engines along-with emerged technologies. The ongoing paradigm embraces parallel computing as the most-suitable proposition. Pipelining and Parallelism have been intensively studied in recent years, yet parallel programming ...