Devito (v3.1.0): an embedded domain-specific language for finite differences and geophysical exploration

Louboutin, Mathias; Lange, Michael; Luporini, Fabio; Kukreja, Navjot; Witte, Patrick; Herrmann, Felix J.; Velesko, Paulius; Gorman, Gerard J.

doi:10.5194/gmd-12-1165-2019

Cited by 134 publications

(71 citation statements)

References 56 publications

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“…The hard boundary implies no memory coherency, therefore information must be exchanged between the two domains in order to solve Equation 3 correctly. line of research, domain-specific languages (DSLs) and domainspecific parallel programming models and compiler optimizations for stencils have been proposed (e.g., [19,23,34]). Performance models have been developed for this computing pattern (see [11]), and the kernel has been ported to a variety of platforms ( [3,4]).…”

Section: Related Work 31 Stencil Computationmentioning

confidence: 99%

Porting and Evaluation of a Distributed Task-driven Stencil-based Application

Raut

Anderson

Araya‐Polo

et al. 2021

Proceedings of the 12th International Workshop on Programming Models and Applications for Multicores and Manycores

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Alternative programming models and runtimes are increasing in popularity and maturity. This allows porting and comparing, on competitive grounds, emerging parallel approaches against the traditional MPI+X paradigm. In this work, an implementation of distributed task-based stencil computation is compared with a traditional MPI+X implementation of the same application. The Legion task-based parallel programming system is used as an alternative to MPI, but the underlying OpenMP approach is kept at the subdomain level. Overall results are promising toward making this alternative method competitive to the traditional MPI approach. In future work, extensions to other applications will be explored, as well as the use of GPUs. CCS CONCEPTS• Computing methodologies → Parallel programming languages.

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Section: Related Work 31 Stencil Computationmentioning

confidence: 99%

Porting and Evaluation of a Distributed Task-driven Stencil-based Application

Raut

Anderson

Araya‐Polo

et al. 2021

Proceedings of the 12th International Workshop on Programming Models and Applications for Multicores and Manycores

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“…It would have been possible to use a code generator already based on SymPy (see e.g. Louboutin et al (2019)) but such code generators being domain specific, it was less adapted to the investigation of the PKF for arbitrary dynamics. In place, we consider a finite difference implementation of partial derivatives with respect to spatial coordinates.…”

Section: Automatic Code Generation For Numerical Simulationsmentioning

confidence: 99%

SymPKF (v1.0): a symbolic and computational toolbox for the design of parametric Kalman ﬁlter dynamics

Pannekoucke

Arbogast

2021

Preprint

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Abstract. Recent researches in data assimilation lead to the introduction of the parametric Kalman filter (PKF): an implementation of the Kalman filter, where the covariance matrices are approximated by a parameterized covariance model. In the PKF, the dynamics of the covariance during the forecast step relies on the prediction of the covariance parameters. Hence, the design of the parameter dynamics is crucial while it can be tedious to do this by hand. This contribution introduces a python package, SymPKF, able to compute PKF dynamics for univariate statistics and when the covariance model is parameterized from the variance and the local anisotropy of the correlations. The ability of SymPKF to produce the PKF dynamics is shown on a non-linear diffusive advection (Burgers equation) over a 1D domain and the linear advection over a 2D domain. The computation of the PKF dynamics is performed at a symbolic level, but an automatic code generator is also introduced to perform numerical simulations. A final multivariate example illustrates the potential of SymPKF to go beyond the univariate case.

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“…Synthetic shot gathers were then migrated in depth using a reverse-time algorithm. Both modeling and reverse-time migration were conducted with Devito [38].…”

Section: D Seismic Syntheticsmentioning

confidence: 99%

Elucidating the Effects of Hydrothermal Alteration on Seismic Reflectivity in the Footwall of the Lalor Volcanogenic Massive Sulfide Deposit, Snow Lake, Manitoba, Canada

2019

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The integrated analysis of seismic rock properties, lithogeochemical data, and mineral compositional data, estimated via scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), provides insight into the effects of hydrothermal alteration on seismic reflectivity in the footwall of the Lalor volcanogenic massive sulfide (VMS) deposit, Manitoba, Canada. The effects of hydrothermal alteration on variations in acoustic impedance are secondary in magnitude and superimposed on the dominant acoustic impedance contrast between felsic and mafic volcanic protoliths. This secondary effect is due to an increase in P-wave velocity with increasing intensity of hydrothermal alteration, as measured by the Ishikawa and Carbonate-Chlorite-Pyrite alteration indices. Mixture modeling of the seismic rock properties and mineral percentages suggests that the increase in seismic velocity is due to an increase in abundance of cordierite, which is one of the diagnostic aluminum silicates for hydrothermally-altered volcanic rocks metamorphosed in the upper almandine amphibolite facies. The synthetic seismic data of a simple VMS model consisting of mafic-felsic host rock contacts, a sulfide ore lens, and a discordant hydrothermal conduit, consisting of the amphibolite-facies mineral assemblage (600 °C, 6 kbar) encountered at Lalor, show enhanced seismic reflections at conduit-host rock contacts, in comparison to its greenschist facies equivalent (350 °C, 2.5 Kbar). This zone of enhanced seismic reflectivity in the footwall of the massive sulfide ore zone is also recognized on the Lalor seismic data suggesting that high-grade terrains hosting VMS deposits possess enhanced potential for the seismic detection of their footwall hydrothermal alteration zones.

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Devito (v3.1.0): an embedded domain-specific language for finite differences and geophysical exploration

Cited by 134 publications

References 56 publications

Porting and Evaluation of a Distributed Task-driven Stencil-based Application

Porting and Evaluation of a Distributed Task-driven Stencil-based Application

SymPKF (v1.0): a symbolic and computational toolbox for the design of parametric Kalman ﬁlter dynamics

Elucidating the Effects of Hydrothermal Alteration on Seismic Reflectivity in the Footwall of the Lalor Volcanogenic Massive Sulfide Deposit, Snow Lake, Manitoba, Canada

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