Roberto Vaccaro

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Combinatorial optimization problems require computing efforts which grow at least exponentially with the problem dimension. Therefore, the use of the remarkable power of massively parallel systems constitutes an opportunity to be considered for solving significant applications in reasonable times. In this paper, starting from Tabu Search, a general(More)
This paper presents an easy and straightforward routing algorithm for WK-Recursive topologies. The algorithm, based on adaptive routing, takes advantage of the geometric properties of such topologies. Once a source node S and destination node D have been determined for a message communication, they characterize, at some level l, two virtual nodes hl vn(S D)(More)
The ambitious challenges posed by next exascale computing systems may require a critical re-examination of both architecture design and consolidated wisdom in terms of programming style and execution model, because such systems are expected to be constituted by thousands of processors with thousands of cores per chip. But how to build exascale architectures(More)
Configurable computing has become a subject of a great deal of research given its potential to greatly accelerate a wide variety of applications that require high throughput. In this context, the dataflow approach is still promising to accelerate the kernel of applications in the field of HPC. That tanks to a computational dataflow engine able to execute(More)
This paper presents a static dataflow graph model, where only data tokens are allowed to flow. The proposed model is formally described, and the dataflow graph is obtained by employing only actors with homogeneous I/O conditions. Each actor, which executes an elemental operation, is characterized by having one output and two input arcs. Even though no(More)
A High Level Dataaow System. This paper presents a new dataaow graph model, where only data tokens are allowed to ow. First we introduce a High-Level Dataaow System (HLDS) to describe a formal dataaow graph model, then we present a homogeneous HLDS (hHLDS) that formally describes our proposal. In this proposal the dataaow graph is obtained by employing only(More)