Posts
Nov, 8
A Class of Hybrid LAPACK Algorithms for Multicore and GPU Architectures
Three out of the top four supercomputers in the November 2010 TOP500 list of the world’s most powerful supercomputers use NVIDIA GPUs to accelerate computations. Ninety-five systems from the list are using processors with six or more cores. Three-hundred-sixty-five systems use quad-core processor-based systems. Thirty-seven systems are using dual-core processors. The large-scale enabling of hybrid […]
Nov, 8
High performance massively parallel direct N-body simulations on large GPU clusters
We present direct astrophysical N-body simulations with up to six million bodies using our parallel MPI/CUDA code on large GPU clusters in China, with different kinds of GPU hardware. These clusters are directly linked under the Chinese Academy of Sciences special GPU cluster program. We reach about one third of the peak GPU performance for […]
Nov, 8
The Infrared behavior of SU(3) Nf=12 gauge theory -about the existence of conformal fixed point-
Incorporated with twisted boundary condition, Polyakov loop correlators can give a definition of the renormalized coupling. We employ this scheme for the step scaling method (with step size s = 2) in the search of conformal fixed point of SU(3) gauge theory with 12 massless flavors. Staggered fermion and plaquette gauge action are used in […]
Nov, 8
Speculative Parallel Evaluation Of Classification Trees On GPGPU Compute Engines
We examine the problem of optimizing classification tree evaluation for on-line and real-time applications by using GPUs. Looking at trees with continuous attributes often used in image segmentation, we first put the existing algorithms for serial and data-parallel evaluation on solid footings. We then introduce a speculative parallel algorithm designed for single instruction, multiple data […]
Nov, 7
Flocking Implementation for the Blender Game Engine
In this thesis, we discuss the development of a new Boids system that simulates flocking behavior inside the Blender Game Engine and within the framework of the Real-Time Particles System (RTPS) library developed by Ian Johnson. The collective behavior of Boids is characterized as an emergent behavior caused by following three steering behaviors: separation, alignment, […]
Nov, 7
High-Level Design for FPGA-based Multiprocessor Accelerators
Field programmable gate arrays (FPGAs) have the potential to accelerate scientific computing applications due to their highly parallel architecture. However, for programming these architectures efficiently, hardware description languages (HDL), such as Verilog or VHDL, have to be used. Many application developers are not familiar with these HDL languages, because they traditionally develop their applications using […]
Nov, 7
GPUinspiral – a low-latency, high-performance implementation of the matched-filter gravitational wave search algorithm
A very high performance search pipeline has been developed for the search for gravitational wave signals originating from coalescing compact binary systems in the M<35 MSUN mass range. The goal of this research is to provide a solution to some of the so far computationally unfeasible data analysis methods such as for example the filtering […]
Nov, 7
MELT-a Translated Domain Specific Language Embedded in the GCC Compiler
The GCC free compiler is a very large software, compiling source in several languages for many targets on various systems. It can be extended by plugins, which may take advantage of its power to provide extra specific functionality (warnings, optimizations, source refactoring or navigation) by processing various GCC internal representations (Gimple, Tree, …). Writing plugins […]
Nov, 7
Functional Programming for High-Performance Computing on Heterogeneous Architectures
Heterogeneous architectures become dominant in high-performance computing platforms but programming them remains really hard, especially because high-performance programs are usually written using low-level languages (C, Fortran, OpenMP…) and frameworks (CUDA, OpenCL…). Mid-level frameworks have been introduced to automatically perform management of distributed memory and scheduling on different devices, allowing applications to only submit tasks and […]
Nov, 7
Fast TV-L1 Optical Flow for Interactivity
Vision is a natural tool for human-computer interaction, since it pro- vides visual feedback to the user and mimics some human behaviors. It requires however the fast and robust computation of motion primi- tives, which remains a difficult problem. In this work, we propose to apply some recent mathematical results about convex optimization to the […]
Nov, 7
Keeneland: Bringing heterogeneous GPU computing to the computational science community
The Keeneland project’s goal is to develop and deploy an innovative, GPU-based high-performance computing system for the NSF computational science community.
Nov, 7
A GPU accelerated interactive interface for exploratory functional connectivity analysis of fMRI data
Functional connectivity analysis is a way to investigate how different parts of the brain are connected and interact. A common measure of connectivity is the temporal correlation between a reference voxel time series and all the other time series in a functional MRI data set. An fMRI data set generally contains more than 20,000 within-brain […]
