high performance computing on graphics processing units: hgpu.org

We present a fast and user friendly exoplanet transit light curve modelling package PyTransit, implementing optimised versions of the Gimen’ez and the Mandel & Agol transit models. The package offers an object-oriented Python interface to access the two models implemented natively in Fortran with OpenMP parallelisation. A partial OpenCL version of the quadratic Mandel-Agol model […]

The implementation of parallel genetic algorithms on a graphic processor GPU to solve the Travelling Salesman Problem instances is presented. Two versions of parallel genetic algorithms are implemented, a Parallel Genetic Algorithm with Islands Model and a Parallel Genetic Algorithm with Elite Island; the two versions were executed on a GPU. In both cases, each […]

Sparse matrix-vector multiplication (SpMV) is a central building block for scientific software and graph applications. Recently, heterogeneous processors composed of different types of cores attracted much attention because of their flexible core configuration and high energy efficiency. In this paper, we propose a compressed sparse row (CSR) format based SpMV algorithm utilizing both types of […]

In this thesis we present a state-of-the-art approach to accelerate Monte Carlo valuations of embedded options. Due to regulations and improved risk management, nested simulations (scenarios in scenarios) are becoming increasingly important for institutional investors like: insurance companies, pension funds and housing corporations. Preferably one wishes to use a framework in which multiple related problems […]

The present work is an analysis of the performance of the AXPY, DOT and SpMV functions using OpenCL. The code was tested on the NVIDIA Tesla S2050 GPU and Intel Xeon Phi 3120A coprocessor. Due to nature of the AXPY function, only two versions were implemented, the routine to be executed by the CPU and […]

Real-world optimization problems are very complex and NP-hard. The modeling of such problems is in constant evolution in term of constraints and objectives and their resolution is expensive in computation time. With all this change, even metaheuristics, well known for their efficiency, begin to be overtaken by data explosion. Recently, Thanks to the publication of […]

Sparse matrix factorization involves a mix of regular and irregular computation, which is a particular challenge when trying to obtain high-performance on the highly parallel general-purpose computing cores available on graphics processing units (GPUs). We present a sparse multifrontal QR factorization method that meets this challenge, and is up to eleven times faster than a […]

The ever increasing complexity of scientific applications has led to utilization of new HPC paradigms such as Graphical Processing Units (GPUs). However, modifying applications to run on GPU is challenging. Furthermore, the speedup achieved by using GPUs has added a huge heterogeneity to HPC clusters. In this dissertation, we enabled NPAIRS, a neuro-imaging application, to […]

Today, GPUs and other parallel accelerators are widely used in high performance computing, due to their high computational power and high performance per watt. Still, one of the main bottlenecks of GPU-accelerated cluster computing is the data transfer between distributed GPUs. This not only affects performance, but also power consumption. Often, a data transfer between […]

To aid application characterization and architecture design space exploration, researchers and engineers have developed a wide range of tools for CPUs, including simulators, profilers, and binary instrumentation tools. With the advent of GPU computing, GPU manufacturers have developed similar tools leveraging hardware profiling and debugging hooks. To date, these tools are largely limited by the […]

In this paper, we propose a new very simple numerical method for solving liquid-gas compressible flows on two dimensional cartesian meshes. For achieving high performance, the scheme is tested on recent multi-core processors and Graphics Processing Units (GPU), using the OpenCL environment. We describe how to install and to run the code CLBUBBLE for computing […]

Submission Deadline: 2015-07-10 Topics: Communications, Information and Network Security Access control Anti-malware Anonymity Applied cryptography Authentication and authorization Biometric security Data and system integrity Database security Distributed systems security Electronic commerce Fraud control Grid security Information hiding and watermarking Intellectual property protection Intrusion detection Key management and key recovery Language-based security Operating system security Network […]