high performance computing on graphics processing units: hgpu.org

GPGPU architectures (applications) have several different characteristics compared to traditional CPU architectures (applications): highly multithreaded architectures and SIMD-execution behavior are the two important characteristics of GPGPU computing. In this paper, we propose a potential function that models the DRAM behavior in GPGPU architectures and a DRAM scheduling policy, Alpha-SJF policy to minimize the potential function. […]

This work presents the application of parallel computing techniques using Graphic Processing Units to improve the efficiency of scheduling heuristics for heterogeneous computing systems. The experimental evaluation of the proposed methods demonstrates that a significant reduction on the computing times can be attained, allowing to tackle large scheduling scenarios in reasonable execution times.

The Finite-Difference Time-Domain (FDTD) solution of Maxwell’s equations, a grid-based differential time-domain numerical modeling method, is an approach for the direct modelling of the penetration of structures by continuous plane waves. Although FDTD techniques are considered to be relatively easy to understand and to implement in software, such modelling methods require a high level of […]

In this work, we explore heterogeneous computing hardware, including CPUs, GPUs and FPGAs, for scientific computing. We study system metrics such as throughput, energy efficiency and temperature, and formulate the problem of workload allocation among computing hardware in mathematical models with regards to the three metrics. The workload allocation approach is evaluated using Linpack on […]

Application demands and grand challenges in numerical simulation require for both highly capable computing platforms and efficient numerical solution schemes. Power constraints and further miniaturization of modern and future hardware give way for multi- and manycore processors with increasing fine-grained parallelism and deeply nested hierarchical memory systems — as already exemplified by recent graphics processing […]

In this thesis we investigate techniques and methods for parallel simulation of equation-based, object-oriented (EOO) Modelica models on graphics processing units (GPUs). Modelica is being developed through an international effort via the Modelica Association. With Modelica it is possible to build computationally heavy models; simulating such models however might take a considerable amount of time. […]

The Morse-Smale complex is a useful topological data structure for the analysis and visualization of scalar data. This paper describes an algorithm that processes all mesh elements of the domain in parallel to compute the Morse-Smale complex of large twodimensional data sets at interactive speeds. We employ a reformulation of the Morse-Smale complex using Forman’s […]

Open Computing Language (OpenCL) is an open standard for writing portable software for heterogeneous architectures such as Central Processing Units (CPUs) and Graphic Processing Units (GPUs). Programs written in OpenCL are functionally portable across architectures. However, due to the architectural differences, OpenCL does not warrant performance portability. As previous research shows, different architectures are sensitive […]

Real-life city-traffic simulation presents a good example of multi-agent simulations involving a large number of agents (each human modelled as an individual agent). Analysis of emergent behaviors in social simulations largely depends on the number of agents involved (more than 100,000 agents at least). Due to large number of agents involved, it takes several seconds […]

PETSc is a scalable solver library developed at Argonne National Laboratory (ANL). It is widely used for solving system of equations arising from discretisation of partial differential equations (PDEs). GPU support has recently been added to PETSc to exploit the performance of GPUs. This support is quite new and currently only available in the PETSc […]

As the scale of modern high end computing systems continues to grow rapidly, system failure has become an issue that requires a better solution than the commonly used scheme of checkpoint and restart (C/R). While hard errors have been studied extensively over the years, soft errors are still under-studied especially for modern HPC systems, and […]

Tsunamis need to be studied more carefully and quantitatively to fully understand their destructive impact on coastal areas. Numerical modeling provides an accurate and useful method to model tsunami inundations on a coastline. However, models must undergo a detailed verification and validation process to be used as an accurate hazard assessment tool. Using standards and […]