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We describe an experimental system for parallel distributed processing of numerical algorithms. Computations are performed on GPUs, and communication is facilitated using FPGA-adapters and self-developed interconnects. As case study we have implemented a conjugate gradient solver for the Poisson problem in three dimensions. The work focuses on machine architecture and distributed processing with special...
This note presents the first experimental results about the application of a sensor switching policy to the estimation of the pose of a mobile robot. We assume that only a fraction of the available sensors can be used, to the sake of saving robot's batteries, and investigate sensors' better switching rule with respect to the reliability of the estimated pose under the usual hypotheses of Gaussian...
DISC (Data-Intensive Super Computing) is gaining strong research momentum. DISC systems differ from conventional supercomputers in their focus on data, as they acquire and maintain continually changing massive data sets, in addition to performing large-scale computations over the data. Towards this end, we consider the problem of real-time text indexing and search with high input data rates (10 GB/s...
This paper introduces the module linkage diagram (MLD). This diagram identifies communication bottlenecks between development teams in the release-planning phase. Managers can relieve these bottlenecks by reorganizing the team, and programmers, by modifying the code. Additionally, MLDs can indicate opportunities for releasing "loosely linked" software modules independently from the rest...
This paper presents the performance of the Myrinet Gb/s LAN with the TCP/IP communication protocol in a cluster of Pentium based workstations. We systematically measured the bandwidth and latency of the different layers of the TCP/IP software and the Myrinet firmware/hardware, in order to expose bottlenecks in different levels of the communication protocol stack. Our study identified several bottlenecks...
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