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26

Thomas Dufaud

Current position : Associate Professor (Maître de Conférences) of University of Versailles (UVSQ) since September 2013

I received a Ph.D in Applied Mathematics from Claude Bernard University (Lyon 1) in 2011. I am assistant Professor and affiliated in Maison de la Simulation and LI-PaRAD laboratory where I am a member of the HPC Team. I authored 22 papers in international journals and conferences since 2010. I co-advised 1 Ph.D (2018). My main researches concern numerical linear algebra, parallel solvers and preconditioners, multilevel methods, and their application in the simulation of physical phenomenon. Since 2014 I also study software engineering for HPC and work on YML and multi-SPMD programming models. Since 2018, I am visiting scientist in the Programming Environment Research team in Riken R-CCS (Kobe, Japan).

I am in charge of the first year of the program MCHPS Msc in UVSQ (2014-2017)(2019-) 

Research interests : 

Teaching : 

Journal articles8 documents

  • Olfa Hamdi-Larbi, Ichrak Mehrez, Thomas Dufaud. Machine Learning to Design an Auto-tuning System for the Best Compressed Format Detection for Parallel Sparse Computations. Parallel Processing Letters, World Scientific Publishing, 2021, ⟨10.1142/S0129626421500195⟩. ⟨hal-03429364⟩
  • Jorge Linares, Catherine Cazelles, Pierre-Richard Dahoo, Devan Sohier, Thomas Dufaud, et al.. Shape, size, pressure and matrix effects on 2D spin crossover nanomaterials studied using density of states obtained by dynamic programming. Computational Materials Science, Elsevier, 2021, 187, pp.110061. ⟨10.1016/j.commatsci.2020.110061⟩. ⟨insu-02953987⟩
  • S.E. Allal, D. Sohier, Thomas Dufaud, C. Harlé, Pierre-Richard Dahoo, et al.. Size effect on the three state thermal hysteresis of a 2D spin crossover nanoparticles. Journal of Physics: Conference Series, IOP Publishing, 2018, 1141, pp.012158. ⟨10.1088/1742-6596/1141/1/012158⟩. ⟨hal-01965090⟩
  • Salah Eddine Allal, Camille Harlé, Devan Sohier, Thomas Dufaud, Pierre-Richard Dahoo, et al.. Three stable states simulated for 1D Spin-Crossover Nanoparticles using the Ising-Like model. European Journal of Inorganic Chemistry, Wiley-VCH Verlag, 2017, 2017 (36), pp.4196-4201. ⟨10.1002/ejic.201700598⟩. ⟨insu-01576549⟩
  • Camille Harlé, Salah Eddine Allal, Devan Sohier, Thomas Dufaud, R. Caballero, et al.. Numerical Investigations of the Thermal, Pressure and Size Effects on 2D Spin Crossover Nanoparticles. Journal of Physics: Conference Series, IOP Publishing, 2017, 936, pp.012061. ⟨10.1088/1742-6596/936/1/012061⟩. ⟨insu-01576253⟩
  • Laurent Berenguer, Thomas Dufaud, Damien Tromeur-Dervout. Aitken's acceleration of the Schwarz process using singular value decomposition for heterogeneous 3D groundwater flow problems. Computers and Fluids, Elsevier, 2013, 80, pp.320-326. ⟨10.1016/j.compfluid.2012.01.026⟩. ⟨hal-00863497⟩
  • Thomas Dufaud, Damien Tromeur-Dervout. Efficient parallel implementation of the fully algebraic multiplicative Aitken-RAS preconditioning technique. Advances in Engineering Software, Elsevier, 2012, 53, pp.33-44. ⟨10.1016/j.advengsoft.2012.07.005⟩. ⟨hal-00866310⟩
  • Thomas Dufaud, Damien Tromeur-Dervout. Aitken's acceleration of the Restricted Additive Schwarz preconditioning using coarse approximations on the interface. Comptes rendus hebdomadaires des séances de l'Académie des sciences, Gauthier-Villars, 2010, 348 (13-14), pp.821-824. ⟨10.1016/j.crma.2010.06.021⟩. ⟨hal-00951468⟩

Conference papers11 documents

  • Thomas Dufaud, Miwako Tsuji, Mitsuhisa Sato. Design of Data Management for Multi SPMD Workflow Programming Model. 2018 IEEE/ACM 4th International Workshop on Extreme Scale Programming Models and Middleware (ESPM2), Nov 2018, Dallas, United States. pp.9-18. ⟨hal-02055754⟩
  • Ichrak Mehrez, Olfa Hamdi-Larbi, Thomas Dufaud, Nahid Emad. Machine Learning for Optimal Compression Format Prediction on Multiprocessor Platform. 2018 International Conference on High Performance Computing & Simulation (HPCS), Jul 2018, Orleans, France. ⟨10.1109/HPCS.2018.00047⟩. ⟨hal-01927621⟩
  • Ichrak Mehrez, Olfa Hamdi-Larbi, Thomas Dufaud, Nahid Emad. Understanding the Performances of SMVP on Multiprocessor Platform. The 2018 International Conference on Parallel and Distributed Processing Techniques & Applications PDPTA'18, Jul 2018, Las Vegas, United States. ⟨hal-01863729⟩
  • Ichrak Mehrez, Olfa Hamdi-Larbi, Thomas Dufaud, Nahid Emad. Understanding the Performances of Sparse Compression Formats Using Data Parallel Programming Model.. 2017 International Conference on High Performance Computing & Simulation (HPCS), Jul 2017, Genoa, France. IEEE,, Jul 2017, Genoa, Italy. ⟨10.1109/HPCS.2017.103⟩. ⟨hal-01726654⟩
  • Ichrak Mehrez, Olfa Hamdi-Larbi, Thomas Dufaud, Nahid Emad. Towards an auto-tuning system design for optimal sparse compression format selection with user expertise. 2016 IEEE/ACS 13th International Conference of Computer Systems and Applications (AICCSA), Nov 2016, Agadir, France. ⟨10.1109/AICCSA.2016.7945829⟩. ⟨hal-01726670⟩
  • Thomas Dufaud. On a numerical method to compute flow in complex 3D geological fractured porous media. D1 Seminar, INRIA Rennes, 2013, Rennes, France. ⟨hal-00907505⟩
  • Thomas Dufaud, Damien Tromeur-Dervout. ARAS2 preconditioning technique for CFD industrial cases. Domain Decomposition Methods (DD20), 2013, San Diego, United States. ⟨hal-00907506⟩
  • Thomas Dufaud, Jocelyne Erhel, Géraldine Pichot. Coupled flow model and simulation in 3D porous-fractured media. SIAM Conference on Mathematical & Computational Issues in the Geosciences, Jun 2013, Padova, Italy. ⟨hal-00853271⟩
  • Thomas Dufaud. A two-level preconditioning framework based on a Richardson iterative process. Domain Decomposition Methods (DD21), SAGE team, Inria Rennes and LMNO, Caen, Jun 2012, Rennes, France. ⟨hal-01093857⟩
  • Thomas Dufaud, Damien Tromeur-Dervout. Numerical Investigations and Parallel Implementation of the ARAS2 Preconditioning Technique. PARALLEL, DISTRIBUTED, GRID AND CLOUD COMPUTING FOR ENGINEERING 2011, Apr 2011, Adjacio, France. Paper 41, ⟨10.4203/ccp.95.41⟩. ⟨hal-00951607⟩
  • Laurent Berenguer, Thomas Dufaud, Duc Toan Pham, Damien Tromeur-Dervout. On-the-fly Singular Value Decomposition for Aitken's Acceleration of the Schwarz Domain Decomposition Method,. PARCO11, Sep 2011, Ghent, Belgium. pp.243 - 250. ⟨hal-00951587⟩

Book sections5 documents

  • Miwako Tsuji, Hitoshi Murai, Taisuke Boku, Mitsuhisa Sato, Serge Petiton, et al.. Multi-SPMD Programming Model with YML and XcalableMP. XcalableMP PGAS Programming Language, Springer Singapore, pp.219-243, 2021, ⟨10.1007/978-981-15-7683-6_9⟩. ⟨hal-03429306⟩
  • Joachim Protze, Miwako Tsuji, Christian Terboven, Thomas Dufaud, Hitoshi Murai, et al.. MYX: Runtime Correctness Analysis for Multi-Level Parallel Programming Paradigms. Software for Exascale Computing - SPPEXA 2016-2019, 136, Springer International Publishing, pp.545-567, 2020, Lecture Notes in Computational Science and Engineering, ⟨10.1007/978-3-030-47956-5_18⟩. ⟨hal-03429330⟩
  • Thomas Dufaud. A two-level preconditioning framework based on a Richardson iterative process. Jocelyne Erhel and Martin Gander and Laurence Halpern and Géraldine Pichot and Taoufik Sassi and Olof Widlund. Domain Decomposition Methods in Science and Engineering XXI, 98, Springer, 2014, Lecture Notes in Computational Science and Engineering. ⟨hal-00907504⟩
  • Laurent Berenguer, Thomas Dufaud, Damien Tromeur-Dervout. Acceleration of Convergence for Domain Decomposition Methods. Topping, B.H.V. and Iványi, P. Computational Technology Reviews, Saxe-Coburg Publications, pp.1-24, 2013, ⟨10.4203/ctr.7.1⟩. ⟨hal-00907503⟩
  • Thomas Dufaud, Damien Tromeur-Dervout. Adaptive Aitken-Schwarz Method for Non Separable Operator on Multiprocessor Systems. Parallel Computational Fluid Dynamics: Recent Advances and Future Directions, 2010, Parallel Computational Fluid Dynamics: Recent Advances and Future Directions, 978-1-60595-022-8. ⟨hal-01806654⟩

Preprints, Working Papers, ...1 document

  • Thomas Dufaud, Tromeur-Dervout Damien. ARAS: FULLY ALGEBRAIC TWO-LEVEL DOMAIN DECOMPOSITION PRECONDITIONING TECHNIQUE WITH APPROXIMATION ON COARSE INTERFACES. 2012. ⟨hal-00805313⟩

Theses1 document

  • Thomas Dufaud. Contribution to the development of Aitken Restricted Additive Schwarz preconditioning and application to linear systems arising from automatic differentiation of compressible Navier-Stokes solutions with respect to the simulation’s parameters. Numerical Analysis [math.NA]. Université Claude Bernard - Lyon I, 2011. English. ⟨NNT : 2011LYO10230⟩. ⟨tel-02392923⟩