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Prediction-based Power-Performance Adaptation of Multithreaded Scientific Codes
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2007), TR-07-21
Computing is currently at an inflection point, with the degree of on-chip thread-level parallelism doubling every one to two years. The number of cores has become one of the most important architectural parameters that ...
RAxML-Cell: Parallel Phylogenetic Tree Inference on the Cell Broadband Engine
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2006), TR-06-23
Phylogenetic tree reconstruction is one of the grand challenge problems in Bioinformatics. The search for a best-scoring tree with 50 organisms, under a reasonable optimality criterion, creates a topological search space ...
A Framework to Analyze the Performance of Load Balancing Schemes for Ensembles of Stochastic Simulations
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2012), TR-12-06
Ensembles of simulations are employed to estimate the statistics of possible future states of a system, and are widely used in important applications such as climate change and biological modeling. Ensembles of runs can ...
GPU-based Streaming for Parallel Level of Detail on Massive Model Rendering
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2011), TR-11-12
Rendering massive 3D models in real-time has long been recognized as a very challenging problem because of the limited computational power and memory space available in a workstation. Most existing rendering techniques, ...
Structural Design using Cellular Automata
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2001), TR-01-02
Traditional parallel methods for structural design do not scale well. This paper discusses the application of massively scalable cellular automata (CA) techniques to structural design. There are two sets of CA rules, one ...
Architectural Refactoring for Fast and Modular Bioinformatics Sequence Search
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2006-09-01), TR-06-20
Bioinformaticists use the Basic Local Alignment Search Tool (BLAST) to characterize an unknown sequence by comparing it against a database of known sequences, thus detecting evolutionary relationships and biological ...
CoreTSAR: Task Scheduling for Accelerator-aware Runtimes
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2012), TR-12-20
Heterogeneous supercomputers that incorporate computational accelerators such as GPUs are increasingly popular due to their high peak performance, energy efficiency and comparatively low cost. Unfortunately, the programming ...
Dynamic Multigrain Parallelization on the Cell Broadband Engine
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2006), TR-06-24
This paper addresses the problem of orchestrating and scheduling parallelism at multiple levels of granularity on heterogeneous multicore processors. We present policies and mechanisms for adaptive exploitation and ...
Design and Implementation of a Massively Parallel Version of DIRECT
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2006), TR-06-02
This paper describes several massively parallel implementations for a global search algorithm DIRECT. Two parallel schemes take different approaches to address DIRECT's design challenges imposed by memory requirements and ...
The Cost of Numerical Integration in Statistical Decision-theoretic Methods for Robust Design Optimization
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2006), TR-06-27
The Bayes principle from statistical decision theory provides a conceptual framework for quantifying uncertainties that arise in robust design optimization. The difficulty with exploiting this framework is computational, ...