کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
506805 865045 2016 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
GPU performance analysis of a nodal discontinuous Galerkin method for acoustic and elastic models
ترجمه فارسی عنوان
تجزیه و تحلیل عملکرد GPU یک روش Galerkin متناوب نوتیک برای مدل های صوتی و الاستیک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی


• Several GPU implementations for time-domain wave simulations are compared.
• The numerical schemes are based on a high-order discontinuous finite element method.
• The implementations are profiled using the roofline model to highlight bottlenecks.
• The best implementation depends on the polynomial degree of the basis functions.

Finite element schemes based on discontinuous Galerkin methods possess features amenable to massively parallel computing accelerated with general purpose graphics processing units (GPUs). However, the computational performance of such schemes strongly depends on their implementation. In the past, several implementation strategies have been proposed. They are based exclusively on specialized compute kernels tuned for each operation, or they can leverage BLAS libraries that provide optimized routines for basic linear algebra operations. In this paper, we present and analyze up-to-date performance results for different implementations, tested in a unified framework on a single NVIDIA GTX980 GPU. We show that specialized kernels written with a one-node-per-thread strategy are competitive for polynomial bases up to the fifth and seventh degrees for acoustic and elastic models, respectively. For higher degrees, a strategy that makes use of the NVIDIA cuBLAS library provides better results, able to reach a net arithmetic throughput 35.7% of the theoretical peak value.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Geosciences - Volume 91, June 2016, Pages 64–76
نویسندگان
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