2108

Posts

Dec, 11

A GPU-based light hierarchy for real-time approximate illumination

Illumination rendering including environment lighting, indirect illumination, and subsurface scattering plays for many graphics applications such as games and VR systems. However, it is dificult to run in real-time due to its highly computational cost. We introduce a GPU-based light hierarchy for real-time approximation of the illumination. We store virtual point lights in images and […]
Dec, 11

Large calculation of the flow over a hypersonic vehicle using a GPU

Graphics processing units are capable of impressive computing performance up to 518 Gflops peak performance. Various groups have been using these processors for general purpose computing; most efforts have focussed on demonstrating relatively basic calculations, e.g. numerical linear algebra, or physical simulations for visualization purposes with limited accuracy. This paper describes the simulation of a […]
Dec, 11

A GPU persistent grid mapping for terrain rendering

In this paper we present persistent grid mapping (PGM), a novel framework for interactive view-dependent terrain rendering. Our algorithm is geared toward high utilization of modern GPUs, and takes advantage of ray tracing and mesh rendering. The algorithm maintains multiple levels of the elevation and color maps to achieve a faithful sampling of the viewed […]
Dec, 11

GPU-based rendering for deformable translucent objects

In this paper we introduce an approximate image-space approach for real-time rendering of deformable translucent models by flattening the geometry and lighting information of objects into textures to calculate multi-scattering in texture spaces. We decompose the process into two stages, called the gathering and scattering corresponding to the computations for incident and exident irradiance respectively. […]
Dec, 11

Particle-in-cell Simulations with Charge-Conserving Current Deposition on Graphic Processing Units

We present an implementation of a 2D fully relativistic, electromagnetic Particle-in-Cell code, with charge-conserving current deposition, on parallel graphics processors (GPU) with CUDA. The GPU implementation achieved a one particle-step process time of 2.52 ns for cold plasma runs and 9.15 ns for extremely relativistic plasma runs, which are respectively 81 and 27 times faster […]
Dec, 11

Value Prediction and Speculative Execution on GPU

GPUs and CPUs have fundamentally different architectures. It is conventional wisdom that GPUs can accelerate only those applications that exhibit very high parallelism, especially vector parallelism such as image processing. In this paper, we explore the possibility of using GPUs for value prediction and speculative execution: we implement software value prediction techniques to accelerate programs […]
Dec, 11

Volume and Isosurface Rendering with GPU-Accelerated Cell Projection

We present an efficient GPU-based implementation of the Projected Tetrahedra (PT) algorithm. By reducing most of the CPU-GPU data transfer, the algorithm achieves interactive frame rates (up to 2.0 M Tets/s) on current graphics hardware. Since no topology information is stored, it requires substantially less memory than recent interactive ray casting approaches. The method uses […]
Dec, 11

Distributed Texture Memory in a Multi-GPU Environment

In this paper we present a consistent, distributed, shared memory system for GPU texture memory. This model enables the virtualization of texture memory and the transparent, scalable sharing of texture data across multiple GPUs. Textures are stored as pages, and as textures are read or written, our system satisfies requests for pages on demand while […]
Dec, 11

Zippy: A Framework for Computation and Visualization on a GPU Cluster

Due to its high performance/cost ratio, a GPU cluster is an attractive platform for large scale general-purpose computation and visualization applications. However, the programming model for high performance general-purpose computation on GPU clusters remains a complex problem. In this paper, we introduce the Zippy frame-work, a general and scalable solution to this problem. It abstracts […]
Dec, 11

GPU accelerated radio astronomy signal convolution

The increasing array size of radio astronomy interferometers is causing the associated computation to scale quadratically with the number of array signals. Consequently, efficient usage of alternate processing architectures should be explored in order to meet this computational challenge. Affordable parallel processors have been made available to the general scientific community in the form of […]
Dec, 11

Program optimization carving for GPU computing?

Contemporary many-core processors such as the GeForce 8800 GTX enable application developers to utilize various levels of parallelism to enhance the performance of their applications. However, iterative optimization for such a system may lead to a local performance maximum, due to the complexity of the system. We propose program optimization carving, a technique that begins […]
Dec, 11

Accelerating molecular dynamics simulations using Graphics Processing Units with CUDA

Molecular dynamics is an important computational tool to simulate and understand biochemical processes at the atomic level. However, accurate simulation of processes such as protein folding requires a large number of both atoms and time steps. This in turn leads to huge runtime requirements. Hence, finding fast solutions is of highest importance to research. In […]

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