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Posts

Jun, 26

Effect And Analysis of Elastic Fidelity Computing On GPUs

The graphics processing unit (GPU) has become an integral part and plays a very vital role in high-end computing. Though GPU can easily reduce the execution time, it comes at the expense of power and energy consumption. There are various ways and approaches to reduce the power and energy consumption, Elastic Fidelity Computing (EFC) in […]
Jun, 26

Fast LBP Face Detection on low-power SIMD architectures

This paper presents an embedded implementation of a face detection method based on boosted LBP features for Single Instruction Multiple Data (SIMD) architectures. The implementation exploits parallelism and data reuse in the detection algorithm and is integrated into CogniVue’s Gen-1 APEX platform, which uses a SIMD design and is extremely energy efficient. The proposed embedded […]
Jun, 26

Multi-GPU Implementation of a Hybrid Thermal Lattice Boltzmann Solver using the TheLMA Framework

In this contribution, a single-node multi-GPU thermal lattice Boltzmann solver is presented. We implement a simplified version of the hybrid model developed by Lallemand and Luo in 2003, which combines multiple-relaxation-time lattice Boltzmann for the fluid flow with a finite-difference method for temperature. The program is based on the TheLMA framework which was developed for […]
Jun, 26

C and CUDA Implementation for SIRT and SART Reconstruction Algorithms

Tomographic reconstruction techniques deserve studying because of its plenty of application in interdisciplinary fields. With outstanding features of no need to set of uniformly distributed projections for precise reconstruction, easy provide a priori knowledge about the reconstructed object, good image quality, we chose Simultaneous Iterative Reconstruction Technique (SIRT) and Simultaneous Algebraic Reconstruction Technique (SART) as […]
Jun, 25

Customizing Driving Directions with GPUs

Computing driving directions interactively on continental road networks requires preprocessing. This step can be costly, limiting our ability to incorporate new optimization functions, including traffic information or personal preferences. We show how the performance of the state-of-the-art customizable route planning (CRP) framework is boosted by GPUs, even though it has highly irregular structure. Our experimental […]
Jun, 25

Concurrent Analytical Query Processing with GPUs

In current databases, GPUs are used as dedicated accelerators to process each individual query. Sharing GPUs among concurrent queries is not supported, causing serious resource underutilization. Based on the profiling of an open-source GPU query engine running commonly used single-query data warehousing workloads, we observe that the utilization of main GPU resources is only up […]
Jun, 25

GPU-Parallel simulation of rigid fibers in Stokes flow

The simulation of a fiber suspension requires that all interactions between the fibers involved are computed. This is a compute-intensive N-body problem that is highly data parallel. Using the GPU for these types of computations can be very beneficial. In this thesis an extension to a simulator, written in MATLAB, for rigid fibers in Stokes […]
Jun, 25

GPU accelerated Hybrid Tree Algorithm for Collision-less N-body Simulations

We propose a hybrid tree algorithm for reducing calculation and communication cost of collision-less N-body simulations. The concept of our algorithm is that we split interaction force into two parts: hard-force from neighbor particles and soft-force from distant particles, and applying different time integration for the forces. For hard-force calculation, we can efficiently reduce the […]
Jun, 25

Preemptive Thread Block Scheduling with Online Structural Runtime Prediction for Concurrent GPGPU Kernels

Recent NVIDIA Graphics Processing Units (GPUs) can execute multiple kernels concurrently. On these GPUs, the thread block scheduler (TBS) uses the FIFO policy to schedule their thread blocks. We show that FIFO leaves performance to chance, resulting in significant loss of performance and fairness. To improve performance and fairness, we propose use of the preemptive […]
Jun, 24

AES encryption on modern consumer architectures

Specialized cryptographic processors target professional applications and offer both low latency and high throughput at the expense of cost. At the consumer level, a modern SoC embodies several accelerators and vector extensions (e.g. SSE, AES-NI), having a high degree of programmability through multiple APIs (OpenMP, OpenCL, etc). This work explains how a modern x86 system […]
Jun, 24

GPU-driven Parallel Processing for Realtime Creation of Tree Animation

The technological demand for graphically generating natural plants in real time recently have been more and more increasing in a variety of interactive content-creating areas such as computer games. In this paper, we propose a GPU-driven high-speed parallel processing algorithm for generating trees and their branches and leaves in real time. The method that we […]
Jun, 23

GPU-based ray-casting of non-rigid deformations: a comparison between direct and indirect approaches

For ray-casting of non-rigid deformations, the direct approach (as opposed to the traditional indirect approach) does not require the computation of an intermediate volume to be used for the rendering step. The aim of this study was to compare the two approaches in terms of performance (speed) and accuracy (image quality). The direct and the […]

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