In dynamic bulk synchronous computations, processors may change their workloads from phase to phase. Such workload change will possibly increase the duration of a phase and the overall parallel execution time. Therefo...
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ISBN:
(纸本)0769521320
In dynamic bulk synchronous computations, processors may change their workloads from phase to phase. Such workload change will possibly increase the duration of a phase and the overall parallel execution time. Therefore, it is necessary to redistribute workload at runtime to reduce the parallel time. However, such workload redistribution at runtime can be expensive and the overhead of frequent runtime workload redistribution may exceed the benefit of workload redistribution and balancing. The problem of finding the optimal period of runtime workload redistribution for dynamic bulk synchronous computations is motivated by the combined consideration of parallel execution time and system overhead for workload redistribution and balancing. We develop an analytical method to solve the problem in heterogeneous computing systems. We also demonstrate numerical data of the analytical method and simulation results that verify the analytical data.
The proceeding contains 33 papers. The topics discussed include: the distinctive challenges of pervasive games as distributed real-time applications;a steering environment for online parallel visualization of legacy p...
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ISBN:
(纸本)0769526977
The proceeding contains 33 papers. The topics discussed include: the distinctive challenges of pervasive games as distributed real-time applications;a steering environment for online parallel visualization of legacy parallelsimulations;EGRESS: environment for generating realistic scenarios for simulations;a peer-to-peer architecture for collaborative haptic assembly;real time P2P network simulation for very large virtual environment;a peer-to-peer simulation technique for instanced massively multiplayer games;distributed load balancing in heterogeneous peer-to-peer networks for web computing libraries;comparison of head gaze and head and eye gaze within an immersive environment;exploring the effect of curvature on the consistency of dead reckoned paths for different error threshold metrics;multi-level modeling and simulation in systems biology-promises and challenges;and a capture and access mechanism for accurate recording and playing of 3D virtual environment simulations.
The "priority-based directed minimum? spanning tree" (PST) is designed for distributed Interactive Applications (DIAs) in which the data are delivered to the receiver node according to their priority;however...
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ISBN:
(纸本)0769526977
The "priority-based directed minimum? spanning tree" (PST) is designed for distributed Interactive Applications (DIAs) in which the data are delivered to the receiver node according to their priority;however PST can not balance the bandwidth usage among the nodes and the system will be unstable when its scale, increases. This paper proposes a novel overlay multicast protocol named Priority Based Overlay Multicast (POM), which uses the priority, delay and available bandwidth to construct the multicast tree, besides a filtering mechanism is proposed to rebuild the tree when the available bandwidth shortage appears. The effectiveness of our protocol is demonstrated in the simulation results, showing that POM uses the available bandwidth efficiently, besides it keeps the system stable when its scale increases.
simulation is a low cost alternative to experimentation on real-world physical systems. Grid technology enables coordinated use of and secure access to distributed computing resources and data sources. The service-ori...
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This paper presents the parallel numerical simulation of 3-D compressible strongly rotating viscous flows by solving Navier-Stokes equations using meshless Least Square Kinetic Upwind Method (LSKUM) solver. The paper ...
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This paper presents the parallel numerical simulation of 3-D compressible strongly rotating viscous flows by solving Navier-Stokes equations using meshless Least Square Kinetic Upwind Method (LSKUM) solver. The paper describes the LSKUM solver and also addresses the various issues that arise while parallelisation is carried out for LSKUM-NS code for viscous compressible flows using a typical distributed memory architecture. The computational fluid dynamic (CFD) simulation showed a large sized subsonic pocket with a vortex ahead of the stationary body. The parallel meshless CFD code coupled with diffusion and optimization code is capable of solving many viscous rotating flows.
This paper addresses issues in interconnecting military command and control (C2) and simulation systems, using Web technologies and mediation via a common representation, the Command and Control Information Exchange D...
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ISBN:
(纸本)0769526977
This paper addresses issues in interconnecting military command and control (C2) and simulation systems, using Web technologies and mediation via a common representation, the Command and Control Information Exchange Data Model (C2IEDM). The authors supported a NATO Exploratory Team that designed an experimental program to assess the approach and prepare for its use by coalitions. As part of. that activity, the United States and France implemented an international demonstration of C2 and simulation systems interoperating using Web Services and C2IEDM This paper reports on how C2 and simulation systems were employed with Web technologies to achieve a successful demonstration in a very short time period, including experience gained in the process and plans for future development of C-BML capabilities.
simulation-based planning by emergency management agencies for region-scale evacuation scenarios requires fast execution of large vehicular traffic models. The planning problem is characterized by the need to capture ...
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Multi-resolution models can be statically (i.e., before simulation) or dynamically (i.e., during simulation) abstracted to accelerate the simulations without compromising the analysis goals. However, abstractions must...
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We propose a peer-to-peer event ordering and simulation technique aimed at networked real-time action games. Partially based on replicated simulators, its goal is to support decentralized playout in small-scale game s...
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Multiprocessor system-on-chip (MP-SoC) platforms represent an emerging trend for embedded multimedia applications. To enable MP-SoC platforms, scalable communication-centric interconnect fabrics, such as networks-on-c...
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ISBN:
(纸本)1424401550
Multiprocessor system-on-chip (MP-SoC) platforms represent an emerging trend for embedded multimedia applications. To enable MP-SoC platforms, scalable communication-centric interconnect fabrics, such as networks-on-chip (NoC), have been recently proposed. The shared memory represents one of the key elements in designing MP-SoCs, since its function is to provide data exchange and synchronization support. In this paper, a distributed shared memory architecture has been explored, that is suitable for low-power on-chip multiprocessors based on NoC. In particular, the paper focuses on the energy/delay exploration of on-chip physically distributed and logically shared memory address space for MP-SoCs based on a parameterizable NoC. The data allocation on the physically distributed shared memory space is dynamically managed by an on-chip Hardware Memory Management Unit. Experimental results show the impact of different NoC topologies and distributed shared memory configurations for a selected set of parallel benchmark applications from the power/performance perspective.
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