From CPU to GPU in Two days: 3D elastic orthorhombic modeling with openAcc.

Vladimir Kazei, Nabil Masmoudi, Juwon Oh, Christos Tzivanakis, Tariq Alkhalifa

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Wavefield modeling is necessary in modern seismic imaging applications such as reverse time migration and full-waveform inversion. When the medium has complex structures such as salt bodies or carbonate reservoirs finite-difference methods (FDM) for wavefield simulation (extrapolation) are typically used to handle those cases. FDM allows us to simulate a multitude of realistic wave phenomena, but in some cases it makes our applications computationally intensive. When large numbers of sources and receivers are considered, a large number of wavefield extrapolations in the process of inversion is executed. To accelerate the 3-D wavefield simulation in elastic orthorhombic anisotropic media we rely on GPU technology. With the OpenAcc PGI compiler we create a pool of automatically managed memory that is shared between the CPU and GPU, thus achieving data management with minimal code modifications. We collapse the tightly nested loops used for velocity and stress updates which allows us to improve the execution time of the whole code by about ten percent. We report a performance speedup as we compare to a 16 core dual socket Haswell server of 1.15X on a K80 GPU and 2.32X when using the Pascal Tesla P100 GPU.

Original languageEnglish (US)
Title of host publication3rd EAGE Workshop on High Performance Computing for Upstream 2017
PublisherEuropean Association of Geoscientists and Engineers, EAGE
Pages44-48
Number of pages5
ISBN (Electronic)9781510850828
StatePublished - Jan 1 2017
Event3rd EAGE Workshop on High Performance Computing for Upstream 2017 - Athens, Greece
Duration: Oct 1 2017Oct 4 2017

Publication series

Name3rd EAGE Workshop on High Performance Computing for Upstream 2017

Conference

Conference3rd EAGE Workshop on High Performance Computing for Upstream 2017
CountryGreece
CityAthens
Period10/1/1710/4/17

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Software
  • Theoretical Computer Science
  • Modeling and Simulation

Fingerprint Dive into the research topics of 'From CPU to GPU in Two days: 3D elastic orthorhombic modeling with openAcc.'. Together they form a unique fingerprint.

Cite this