IHP: a dynamic heterogeneous parallel scheme for iterative or time-step methods-- image denoising as case study

TítuloIHP: a dynamic heterogeneous parallel scheme for iterative or time-step methods-- image denoising as case study
AutoresRuben Laso, José C. Cabaleiro, Francisco F. Rivera, M. Carmen Muñiz & José A. Álvarez-Dios
TipoArtículo de revista
Fonte Journal of Supercomputing, SPRINGER, 2020.
RankProvisionally ranked Q1 in Software by SJR 2019
ISSN0920-8542
DOI10.1007/s11227-020-03260-8
AbstractIterative and time-step methods are spread far and wide in several mathematics and physics domains. At the same time, modern computers include multicore CPUs along with GPUs, so it is important to use all their computing capabilities for their efficient use. Aiming to improve performance of this kind of numerical methods, we introduce in this work a new heterogeneous parallelism CPU + GPU scheme which we call IHP. This new scheme has the advantage of being self-balanced and able to dynamically distribute the workload between CPU and GPU according to their performance on the fly. Also, it can be used with several contending technologies, like CUDA and OpenCL for GPUs or OpenMP and Intel TBB for CPUs. As a case in point, we analyse an image denoising problem based on time-step diffusion methods for brightness and chromaticity. Results show execution significant improvements in execution time using this scheme, with a minimal overhead.
Palabras chaveHeterogeneous parallelism, Iterative methods, Time-step methods, Image processing, Finite differences