high performance computing on graphics processing units: hgpu.org

This whitepaper aims to discuss first experiences with porting an MPI-based real-world geophysical application to the new Intel Many Integrated Core (MIC) architecture. The selected code SeisSol is an application written in Fortran that can be used to simulate earthquake rupture and radiating seismic wave propagation in complex 3-D heterogeneous materials. The PRACE prototype cluster […]

Direct numerical simulation (DNS) and large eddy simulation (LES) were performed on the wall-bounded flow at Re_tau = 180 using lattice Boltzmann method (LBM) and multiple Graphic Processing Units (GPUs). In the DNS, 8 K20M GPUs were adopted. The maximum number of meshes is 6.7×10^7, which results in the non-dimensional mesh size of Delta+=1.41 for […]

In this work, a speed comparison between GPU-based CUDA k-NN implementation and the ANN implementation has been tested on three sets of medical imaging data. The results show that with higher dimensional data, CUDA-based k-NN approach could have up to two orders of magnitude of speed up. Otherwise, ANN would be a better implementation to […]

The Characteristic Basis Function Method (CBFM) is a popular technique for efficiently solving the Method of Moments (MoM) matrix equations. In this work, we address the adaptation of this method to a relatively new computing infrastructure provided by NVIDIA, the Compute Unified Device Architecture (CUDA), and take into account some of the limitations which appear […]

Data race detection is an important problem in GPU programming. The paper presents a novel solution. It uses the compiler support to privatize shared data and then at run time parallelizes the race checking. It has two distinct features. First, there is no per access monitoring, so the race detection has a low overhead and […]

High performance of modern Graphics Processing Units may be utilized not only for graphics related application but also for general computing. This computing power has been utilized in new variants of many algorithms from almost every computer science domain. Unfortunately, while other application domains strongly benefit from utilizing the GPUs, databases related applications seem not […]

High-Performance Graphics is the leading international forum for performance-oriented graphics and imaging systems research including innovative algorithms, efficient implementations, languages, parallelism, compilers, parallelism, hardware and architectures for high-performance graphics. High-Performance Graphics was founded in 2009 to synthesize and broaden two important and well-respected conferences in computer graphics: Graphics Hardware and Interactive Ray Tracing. The conference […]

Finding the shortest paths from a single source to all other vertices is a fundamental method used in a variety of higher-level graph algorithms. We present three parallel-friendly and work-efficient methods to solve this Single-Source Shortest Paths (SSSP) problem: Workfront Sweep, Near-Far and Bucketing. These methods choose different approaches to balance the tradeoff between saving […]

GPGPUs are increasingly used in several domains, from gaming to different kinds of computationally intensive applications. In some cases, their reliability is becoming a serious issue and several research activities are focusing on its evaluation. This paper aims at overviewing some major results in the area. First, it shows and analyzes the results of some […]

Galois field (GF) expressions are polynomials used as representations of multiple-valued logic (MVL) functions. For this purpose, MVL functions are considered as functions defined over a finite (Galois) field of order p – GF(p). The problem of computing these functional expressions has an important role in areas such as digital signal processing and logic design. […]

Betweenness centrality is an important metric in the study of network analysis. This report discusses the problem of exact computation of betweenness cenrality index in network analysis. BC is an important metric in small world network analysis which is expensive to compute. A new strategy is presented to parallelize the best known serial algorithm for […]

Recently MPI implementations have been extended to support accelerator devices, Intel Many Integrated Core (MIC) and nVidia GPU. This has been accomplished by changes to different levels of the software stacks and MPI implementations. In order to evaluate performance and scalability of accelerator aware MPI libraries, we developed portable micro-benchmarks to identify factors that influence […]