Luc Giraud

144
Documents

Publications

Publications

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Cerfacs ALGO Team Scientific Activity Report for the year 2025

Luciano Drozda Dantas Martins , Luc Giraud , Selime Gürol , Carola Kruse , Paul Mycek et al.

TR/PA/26/6, Cerfacs - Toulouse, France. 2026

Rapport (rapport contrat/projet) hal-05519493v1
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Convergence analysis of overlapping domain decomposition preconditioners for nonlinear problems

El Mehdi Ettaouchi , Luc Giraud , Carola Kruse , Nicolas Tardieu

RR-9575, INRIA. 2025

Rapport (rapport de recherche) hal-04958735v2
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A note on the partial convergence management for the solution of symmetric linear systems with multiple right-hand sides

Luc Giraud , Yanfei Xiang

RR-9574, Inria Centre at the University of Bordeaux. 2025

Rapport hal-04922247v1
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Solving eigenvalue problems in high dimensions using contour integration and Tensor Train format

Olivier Coulaud , Luc Giraud , Martina Iannacito , Mohammad Issa

RR-9586, Inria. 2025, pp.19

Rapport hal-05017425v3
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Fault-tolerant numerical iterative algorithms at scale

Alix Tremodeux , Emmanuel Agullo , Anne Benoit , Luc Giraud , Thomas Herault et al.

RR-9567, Inria Lyon. 2025

Rapport hal-04872041v1
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Neural network preconditioning: a case study for the solution of the parametric Helmholtz equation

Luc Giraud , Carola Kruse , Paul Mycek , Maksym Shpakovych , Yanfei Xiang

RR-9593, Inria Centre at the University of Bordeaux, France. 2025

Rapport (rapport de recherche) hal-05157038v1
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A robust GMRES algorithm in Tensor Train format

Olivier Coulaud , Luc Giraud , Martina Iannacito

[Research Report] RR-9484, Inria; Alma Mater Studiorum – Università di Bologna. 2022, pp.1-48

Rapport (rapport de recherche) hal-03776529v4
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On some orthogonalization schemes in Tensor Train format

Olivier Coulaud , Luc Giraud , Martina Iannacito

RR-9491, Inria Bordeaux - Sud-Ouest. 2022

Rapport hal-03850387v3
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The backward stable variants of GMRES in variable accuracy

Emmanuel Agullo , Olivier Coulaud , Luc Giraud , Martina Iannacito , Gilles Marait et al.

[Research Report] RR-9483, Inria. 2022, pp.1-77

Rapport hal-03776837v3
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A note on the strong parallel scalability of numerically scalable Poisson linear solvers

Emmanuel Agullo , Luc Giraud , Valentin Joncquieres , Gilles Marait , Louis Poirel et al.

[Research Report] RR-9423, Inria Bordeaux - Sud Ouest. 2021, pp.31

Rapport (rapport de recherche) hal-03352049v2
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A block minimum residual norm subspace solver for sequences of multiple left and right-hand side linear systems

Luc Giraud , Yan-Fei Jing , Yanfei Xiang

[Research Report] RR-9393, Inria Bordeaux Sud-Ouest. 2021, pp.60

Rapport (rapport de recherche) hal-03146213v3
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Recycling Krylov subspace strategies for sequences of sampled stochastic elliptic equations

Nicolas Venkovic , Paul Mycek , Luc Giraud , Olivier Le Maitre

[Research Report] RR-9425, Inria Bordeaux - Sud Ouest. 2021

Rapport (rapport de recherche) hal-03366966v1
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On soft errors in the Conjugate Gradient method: sensitivity and robust numerical detection -revised

Emmanuel Agullo , Siegfried Cools , Emrullah Fatih-Yetkin , Luc Giraud , Nick Schenkels et al.

[Research Report] RR-9330, Inria Bordeaux Sud-Ouest. 2020, pp.43

Rapport (rapport de recherche) hal-02495301v3
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A complementary note on soft errors in the Conjugate Gradient method: the persistent error case

Emmanuel Agullo , Siegfried Cools , Emrullah Fatih-Yetkin , Luc Giraud , Nick Schenkels et al.

[Research Report] RR-9360, Inria Bordeaux Sud-Ouest. 2020

Rapport (rapport de recherche) hal-02921669v2
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Exploring variable accuracy storage through lossy compression techniques in numerical linear algebra: a first application to flexible GMRES

Emmanuel Agullo , Franck Cappello , Sheng Di , Luc Giraud , Xin Liang et al.

[Research Report] RR-9342, Inria Bordeaux Sud-Ouest. 2020

Rapport (rapport de recherche) hal-02572910v2
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Comparative study of harmonic and Rayleigh-Ritz procedures with applications to deflated conjugate gradients

Nicolas Venkovic , Paul Mycek , Luc Giraud , Olivier Le Maitre

[Research Report] Cerfacs. 2020

Rapport (rapport de recherche) hal-02434043v1
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On soft errors in the Conjugate Gradient method: sensitivity and robust numerical detection

Emmanuel Agullo , Siegfried Cools , Emrullah Fatih-Yetkin , Luc Giraud , Wim Vanroose

[Research Report] RR-9226, Inria Bordeaux Sud-Ouest. 2018

Rapport (rapport de recherche) hal-01929738v1
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Energy analysis of a solver stack for frequency-domain electromagnetics

Emmanuel Agullo , Luc Giraud , Stéphane Lanteri , Gilles Marait , Anne-Cécile Orgerie et al.

[Research Report] RR-9240, Inria Bordeaux Sud-Ouest. 2018

Rapport (rapport de recherche) hal-01962629v1
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Low-rank Factorizations in Data Sparse Hierarchical Algorithms for Preconditioning Symmetric Positive Definite Matrices

Emmanuel Agullo , Eric Darve , Luc Giraud , Yuval Harness

[Research Report] RR-9200, Inria Bordeaux Sud-Ouest. 2018

Rapport (rapport de recherche) hal-01856399v2
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Nearly optimal fast preconditioning of symmetric positive definite matrices

Emmanuel Agullo , Eric Darve , Luc Giraud , Yuval Harness

[Research Report] RR-8984, Inria Bordeaux Sud-Ouest. 2016, pp.34

Rapport (rapport de recherche) hal-01403480v2
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Hierarchical hybrid sparse linear solver for multicore platforms

Emmanuel Agullo , Luc Giraud , Stojce Nakov , Jean Roman

[Research Report] RR-8960, INRIA Bordeaux. 2016, pp.25

Rapport (rapport de recherche) hal-01379227v1
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Interior penalty discontinuous Galerkin method for coupled elasto-acoustic media

Yohann Dudouit , Luc Giraud , Florence Millot , Sébastien Pernet

[Research Report] RR-8986, Inria Bordeaux Sud-Ouest. 2016

Rapport (rapport de recherche) hal-01406158v1
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Task-based hybrid linear solver for distributed memory heterogeneous architectures

Emmanuel Agullo , Luc Giraud , Stojce Nakov

[Research Report] RR-8913, Inria Bordeaux Sud-Ouest. 2016

Rapport (rapport de recherche) hal-01316783v1
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Robust coarse spaces for Abstract Schwarz preconditioners via generalized eigenproblems

Emmanuel Agullo , Luc Giraud , Louis Poirel

[Research Report] RR-8978, INRIA Bordeaux. 2016

Rapport (rapport de recherche) hal-01399203v1
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On the resilience of a parallel sparse hybrid solver

Emmanuel Agullo , Luc Giraud , Mawussi Zounon

[Research Report] RR-8744, INRIA Bordeaux; INRIA. 2015

Rapport (rapport de recherche) hal-01165186v2
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Interpolation-restart strategies for resilient eigensolvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Mawussi Zounon

[Research Report] 8625, INRIA Bordeaux. 2015

Rapport (rapport de recherche) hal-01201748v2
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Block GMRES method with inexact breakdowns and deflated restarting

Emmanuel Agullo , Luc Giraud , Yan-Fei Jing

[Research Report] RR-8503, INRIA. 2014, pp.31

Rapport (rapport de recherche) hal-00963704v2
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Spectral recycling strategies for the solution of nonlinear eigenproblems in thermoacoustics

Pablo Salas , Luc Giraud , Yousef Saad , Stéphane Moreau

[Research Report] RR-8542, INRIA. 2014, pp.23

Rapport (rapport de recherche) hal-00996601v1
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Towards resilient parallel linear Krylov solvers: recover-restart strategies

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman , Mawussi Zounon

[Research Report] RR-8324, INRIA. 2013, pp.36

Rapport (rapport de recherche) hal-00843992v1
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A Parallel Full Geometric Multigrid Solver for Time Harmonic Maxwell Problems

Mathieu Chanaud , Luc Giraud , David Goudin , Jean-Jacques Pesqué , Jean Roman

[Research Report] RR-8335, INRIA. 2013, pp.25

Rapport (rapport de recherche) hal-00847966v1
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Deflation and augmentation techniques in Krylov linear solvers

Olivier Coulaud , Luc Giraud , Pierre Ramet , Xavier Vasseur

[Research Report] RR-8265, INRIA. 2013, 25 p

Rapport (rapport de recherche) hal-00803225v1
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Task-based Conjugate-Gradient for multi-GPUs platforms

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Stojce Nakov , Jean Roman

[Research Report] RR-8192, INRIA. 2012, pp.28

Rapport (rapport de recherche) hal-00767368v1
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Parallel algebraic domain decomposition solver for the solution of augmented systems

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman

[Research Report] RR-7516, INRIA. 2011

Rapport (rapport de recherche) inria-00559133v1
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Sparse approximations of the Schur complement for parallel algebraic hybrid linear solvers in 3D

Luc Giraud , Azzam Haidar , Yousef Saad

[Research Report] RR-7237, INRIA. 2010, pp.18

Rapport (rapport de recherche) inria-00466828v1
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Convergence analysis of overlapping domain decomposition preconditioners for nonlinear problems

El Mehdi Ettaouchi , Luc Giraud , Carola Kruse , Nicolas Tardieu

SIAM Journal on Scientific Computing, 2025, 47 (6), pp.A3464-A3493. ⟨10.1137/25M1735585⟩

Article dans une revue hal-05412939v1
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Robustness and reliability of state-space, frame-based modeling for thermoacoustics

Mathieu Cances , Luc Giraud , Michael Bauerheim , Laurent Y.M. Gicquel , Franck Nicoud

Journal of Computational Physics, 2025, 520, pp.113472. ⟨10.1016/j.jcp.2024.113472⟩

Article dans une revue hal-04734953v1
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Fault-tolerant numerical iterative algorithms at scale

Alix Tremodeux , Anne Benoit , Emmanuel Agullo , Thomas Herault , Luc Giraud et al.

International Journal of High Performance Computing Applications, 2025

Article dans une revue hal-05234063v1
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On some orthogonalization schemes in Tensor Train format

Olivier Coulaud , Luc Giraud , Martina Iannacito

BIT Numerical Mathematics, 2025, 65 (45), ⟨10.1007/s10543-025-01086-5⟩

Article dans une revue hal-05343109v1
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A note on TT-GMRES for the solution of parametric linear systems

Olivier Coulaud , Luc Giraud , Martina Iannacito

Electronic Transactions on Numerical Analysis, 2025, 62, pp.163-187. ⟨10.1553/etna_vol62s163⟩

Article dans une revue hal-04986230v1
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A Tensor Train solver for the Magnetic Moment Method

A. Zekri , Olivier Coulaud , Luc Giraud , J.-R. Poirier

IEEE Transactions on Magnetics, 2025, pp.1-1. ⟨10.1109/TMAG.2025.3618391⟩

Article dans une revue hal-05311300v1
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Multifacets of lossy compression for scientific data in the Joint-Laboratory of Extreme Scale Computing

Franck Cappello , Sheng Di , Robert Underwood , Dingwen Tao , Jon Calhoun et al.

Future Generation Computer Systems, 2024, ⟨10.1016/j.future.2024.05.022⟩

Article dans une revue hal-04618060v1
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Combining reduction with synchronization barrier on multi‐core processors

Aboul‐karim Mohamed El Maarouf , Luc Giraud , Abdou Guermouche , Thomas Guignon

Concurrency and Computation: Practice and Experience, 2023, 35 (1), pp.e7402. ⟨10.1002/cpe.7402⟩

Article dans une revue hal-03948901v2
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A block minimum residual norm subspace solver with partial convergence management for sequences of linear systems

Luc Giraud , Yan-Fei Jing , Yanfei Xiang

SIAM Journal on Matrix Analysis and Applications, 2022, 43 (2), pp.710-739. ⟨10.1137/21m1401127⟩

Article dans une revue hal-03546496v2
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Resilience and fault tolerance in high-performance computing for numerical weather and climate prediction

Tommaso Benacchio , Luca Bonaventura , Mirco Altenbernd , Chris D Cantwell , Peter D Düben et al.

International Journal of High Performance Computing Applications, 2021, 35 (4), pp.285-311. ⟨10.1177/1094342021990433⟩

Article dans une revue hal-03138061v1
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Resiliency in numerical algorithm design for extreme scale simulations

Emmanuel Agullo , Mirco Altenbernd , Hartwig Anzt , Leonardo Bautista-Gomez , Tommaso Benacchio et al.

International Journal of High Performance Computing Applications, 2021, pp.10943420211055188. ⟨10.1177/10943420211055188⟩

Article dans une revue hal-03348787v1
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On soft errors in the conjugate gradient method: sensitivity and robust numerical detection

Emmanuel Agullo , Siegfried Cools , Emrullah Fatih-Yetkin , Luc Giraud , Nick Schenkels et al.

SIAM Journal on Scientific Computing, 2020, 42 (6), ⟨10.1137/18M122858X⟩

Article dans une revue hal-03022845v1
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A Plane Wave Scattering Dedicated Integral Equation

Benjamin Alzaix , Luc Giraud , Bastiaan Michielsen , Jean-René Poirier

IEEE Transactions on Antennas and Propagation, 2020, pp.1-10. ⟨10.1109/TAP.2019.2948390⟩

Article dans une revue hal-02448907v2
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Robust preconditioners via generalized eigenproblems for hybrid sparse linear solvers

Emmanuel Agullo , Luc Giraud , Louis Poirel

SIAM Journal on Matrix Analysis and Applications, 2019, 40 (2), pp.417-439. ⟨10.1137/17M1153765⟩

Article dans une revue hal-02074474v1
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High order HDG method and domain decomposition solvers for frequency‐domain electromagnetics

Emmanuel Agullo , Luc Giraud , Alexis Gobé , Matthieu Kuhn , Stephane Lanteri et al.

International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 2019, ⟨10.1002/jnm.2678⟩

Article dans une revue hal-02327982v1
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Low-Rank Factorizations in Data Sparse Hierarchical Algorithms for Preconditioning Symmetric Positive Definite Matrices

Emmanuel Agullo , Eric Darve , Luc Giraud , Yuval Harness

SIAM Journal on Matrix Analysis and Applications, 2018, 39 (4), pp.1701-1725

Article dans une revue hal-01940053v1
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Guest editorial: Special issue on parallel matrix algorithms and applications (PMAA’16)

Emmanuel Agullo , Peter Arbenz , Luc Giraud , Olaf Schenk

Parallel Computing, 2018, 74, pp.1 - 2. ⟨10.1016/j.parco.2018.01.003⟩

Article dans une revue hal-01927721v1
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Analyzing the Effect of Local Rounding Error Propagation on the Maximal Attainable Accuracy of the Pipelined Conjugate Gradient Method

Siegfried Cools , Emrullah Fatih Yetkin , Emmanuel Agullo , Luc Giraud , Wim Vanroose

SIAM Journal on Matrix Analysis and Applications, 2018, 39 (1), pp.426 - 450. ⟨10.1137/17M1117872⟩

Article dans une revue hal-01753411v1
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ASIS v1.0: an adaptive solver for the simulation of atmospheric chemistry

Daniel Cariolle , Philippe Moinat , H. Teyssèdre , Luc Giraud , Béatrice Josse et al.

Geoscientific Model Development, 2017, 10, pp.1467 - 1485. ⟨10.5194/gmd-10-1467-2017⟩

Article dans une revue hal-01507392v1
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Interpolation-restart strategies for resilient eigensolvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Mawussi Zounon

SIAM Journal on Scientific Computing, 2016, 38 (5), pp.C560-C583. ⟨10.1137/15M1042115⟩

Article dans une revue hal-01347793v1

Block GMRES method with inexact breakdowns and deflated restarting

Emmanuel Agullo , Luc Giraud , Yan-Fei Jing

SIAM Journal on Matrix Analysis and Applications, 2014, 35 (4), pp.1625-1651. ⟨10.1137/140961912⟩

Article dans une revue hal-01067159v1

A Parallel Full Geometric Multigrid Solver for Time Harmonic Maxwell Problems

Mathieu Chanaud , Luc Giraud , David Goudin , Jean-Jacques Pesqué , Jean Roman

SIAM Journal on Scientific Computing, 2014, 36 (2), pp.C119-C138. ⟨10.1137/130909512⟩

Article dans une revue hal-00933526v1

Parallel algebraic domain decomposition solver for the solution of augmented systems

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman

Advances in Engineering Software, 2012, 60-61, pp.23-30. ⟨10.1016/j.advengsoft.2012.07.004⟩

Article dans une revue istex hal-00719512v1

Three-dimensional parallel frequency-domain visco-acoustic wave modelling based on a hybrid direct/iterative solver

Florent Sourbier , Azzam Haidar , Luc Giraud , Hafedh Ben-Hadj-Ali , Stéphane Operto et al.

Geophysical Prospecting, 2011, 59 (5), pp.834-856. ⟨10.1111/j.1365-2478.2011.00966.x⟩

Article dans une revue istex hal-00647179v1

New curvilinear scheme for elastic wave propagation in presence of curved topography

Issam Tarrass , Luc Giraud , Pierre Thore

Geophysical Prospecting, 2011, 59 (5), pp.889--906. ⟨10.1111/j.1365-2478.2011.00972.x⟩

Article dans une revue istex hal-00647160v1

Parallel hierarchical hybrid linear solvers for emerging computing platforms

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman

Comptes rendus de l’Académie des sciences. Série IIb, Mécanique, 2011, High Performance Computing, 339 (2-3), pp.96-103. ⟨10.1016/j.crme.2010.11.005⟩

Article dans une revue istex inria-00548916v1

Using multiple levels of parallelism to enhance the performance of domain decomposition solvers

Luc Giraud , Azzam Haidar , Stéphane Pralet

Parallel Computing, 2010, 36 (5-6), pp.285-296. ⟨10.1016/j.parco.2009.12.006⟩

Article dans une revue istex inria-00542444v1

Sparse approximations of the Schur complement for parallel algebraic hybrid linear solvers in 3D

Luc Giraud , Azzam Haidar , Yousef Saad

Numerical Mathematics: Theory, Methods and Applications, 2010, 3 (3), pp.276-294

Article dans une revue inria-00542450v1

Flexible GMRES with deflated restarting

Luc Giraud , Serge Gratton , Xavier Pinel , Xavier Vasseur

SIAM Journal on Scientific Computing, 2010, 32 (4), pp.1858--1878. ⟨10.1137/080741847⟩

Article dans une revue inria-00542426v1

Parallel algebraic hybrid solvers for large 3D convection-diffusion problems

Luc Giraud , Azzam Haidar

Numerical Algorithms, 2009, 51 (2), pp.151-177. ⟨10.1007/s11075-008-9248-x⟩

Article dans une revue istex hal-00441717v1

Parallel Tools for Solving Incremental Dense Least Squares Problems: Application to Space Geodesy

Marc Baboulin , Luc Giraud , Serge Gratton , Julien Langou

Journal of Algorithms and Computational Technology, 2009, 3 (1), pp.117-133. ⟨10.1260/174830109787186541⟩

Article dans une revue hal-03973310v1
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Scalable Domain Decomposition Methods for Large Sparse Linear Systems on Modern Architectures

Stojce Nakov , Emmanuel Agullo , Alfredo Buttari , Luc Giraud , Gilles Marait

COMPAS 2025 - Conférence francophone d'informatique en Parallélisme, Architecture et Système, Jun 2025, Bordeaux, France

Communication dans un congrès hal-05248772v1
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Scalable Domain Decomposition Methods for Large Sparse Linear Systems on Modern Architectures

Stojce Nakov , Emmanuel Agullo , Alfredo Buttari , Luc Giraud , Gilles Marait

Sparse Days 2025, Jun 2025, Toulouse, France

Communication dans un congrès hal-05248757v1

Tensor Train-Based Approach for the Magnetic Moment Method

Amine El Mehdi Zekri , Olivier Coulaud , Luc Giraud , Jean-René Poirier

Compumag 2025 - 25th International Conference on the Computation of Electromagnetic Fields, Jun 2025, Naples, Italy

Communication dans un congrès hal-05291496v1
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Practical stopping criteria for GMRES

Alexandre Malhéné , Emmanuel Agullo , Luc Giraud , Miroslav Rozloznik

Sparse Days meeting 2025, Jun 2025, Toulouse, France

Communication dans un congrès hal-05200599v1
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Sparse Matrix Ordering for Fine Grain Parallel Triangular Solve Using SIMD

Aboul-Karim Mohamed El Maarouf , Luc Giraud , Abdou Guermouche , Thomas Guignon

PPAM 2024 - 15th International Conference on Parallel Processing & Applied Mathematics, Czestochowa University of Technology; Technical University of Ostrava, Sep 2024, Ostrava, Czech Republic. pp.51-64, ⟨10.1007/978-3-031-85697-6_4⟩

Communication dans un congrès hal-05185404v1
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Convolution neural operator preconditioning for the solution of some heterogeneous PDES

Yanfei Xiang , Luc Giraud

DTE - AICOMAS 2025 - Digital Twins in Engineering & Artificial Intelligence and Computational Methods in Applied Science, Kenjiro Terada, John Dolbow, Ferdinando Auricchio, Harald van Brummelen, Dominique Baillargeat, Charbel Farhat, Georges Karniadakis, Stefan Kollmannsberger, Trond Kvamsdal, Vissarion Papadopoulos, Ruben Sevilla, Feb 2025, Paris, France

Communication dans un congrès hal-04961884v1

A journey through some numerical linear algebra algorithms with variable accuracy storage

Luc Giraud , Emmanuel Agullo , Olivier Coulaud , Martina Iannacito , Mohammad Issa et al.

CAS-ANLA 2025 - The Chinese Academy of Sciences Workshop on Approximate computing in Numerical Linear Algebra, Apr 2025, Beijing, China

Communication dans un congrès hal-05049142v1
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Neural operator preconditioning for accelerating the solution of the parametric Helmholtz equations

Yanfei Xiang , Luc Giraud , Paul Mycek , Maksym Shpakovych , Carola Kruse

2024 SIAM Conference on Applied Linear Algebra (SIAM LA24), Laura Grigori, Daniel Kressner, May 2024, Paris, France. pp.2

Communication dans un congrès hal-04581208v4

A journey on subspace methods for the solution of sequences of linear systems

Luc Giraud , Emmanuel Agullo , Olivier Coulaud , Martina Iannacito , Gilles Marait et al.

International conference on Mathematics and decision 2024, Mohammed VI Polytechnic University, Dec 2024, Rabat, Morocco

Communication dans un congrès hal-04854993v1
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Orthogonalization schemes in tensor train format

Martina Iannacito , Olivier Coulaud , Luc Giraud

SIAM Conference on Applied Linear Algebra (LA24), Laura Grigori; Daniel Kressner, May 2024, Paris, France

Communication dans un congrès hal-04587668v1
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Orthogonalization schemes in tensor train format

Martina Iannacito , Olivier Coulaud , Luc Giraud

The 29th Biennial Conference on Numerical Analysis 2023, Jun 2023, Glasgow, United Kingdom

Communication dans un congrès hal-04394115v1
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Hybridization of Machine Learning and Numerical Linear Algebra Techniques for Scientific Computing: Learned Minimum Residual Solvers for the Helmholtz Equations

Yanfei Xiang , Luc Giraud , Paul Mycek , Carola Kruse

CSE 2023 - SIAM Conference on Computational Science and Engineering, RAI Congress Centre | Amsterdam, The Netherlands; SIAM, Feb 2023, Amsterdam, Netherlands

Communication dans un congrès hal-04398087v2
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Orthogonalization schemes in tensor train format

Martina Iannacito , Olivier Coulaud , Luc Giraud

AG 2023 - SIAM Conference on Applied Algebraic Geometry, Jul 2023, Eindhoven / Hybrid, Netherlands

Communication dans un congrès hal-04394130v1
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GMRES in variable accuracy: a case study in low rank tensor linear systems

Martina Iannacito , Emmanuel Agullo , Olivier Coulaud , Luc Giraud , Gilles Marait et al.

GAMM - Workshop on Applied and Numerical Linear Algebra 2022, Erin Carson; Iveta Hnětynková; Stefano Pozza; Petr Tichý; Miroslav Tůma, Sep 2022, Prague, Czech Republic

Communication dans un congrès hal-03826879v2
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Energy Analysis of a Solver Stack for Frequency-Domain Electromagnetics

Emmanuel Agullo , Luc Giraud , Stephane Lanteri , Gilles Marait , Anne-Cécile Orgerie et al.

PDP 2019 - 27th Euromicro International Conference on Parallel, Distributed and Network-Based Processing, Feb 2019, Pavia, Italy. pp.385-391, ⟨10.1109/EMPDP.2019.8671555⟩

Communication dans un congrès hal-02191331v1

On Soft Errors in the Conjugate Gradient: Sensitivity and Robust Numerical Detection

Emmanuel Agullo , Siegfried Cools , Luc Giraud , Emrullah Fatih-Yetkin , Wim Vanroose

CSE19 - SIAM Conference on Computational Science and Engineering, Feb 2019, Spokane, United States

Communication dans un congrès hal-02073742v1

Numerical Analysis of the Maximal Attainable Accuracy in Communication-hiding Pipelined Conjugate Gradients

Siegfried Cools , Jeffrey Cornelis , Emmanuel Agullo , Emrullah Fatih-Yetkin , Luc Giraud et al.

CSE19 - SIAM Conference on Computational Science and Engineering, Feb 2019, Spokane, United States

Communication dans un congrès hal-02073711v1
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Hierarchical Symbolic Factorization for Sparse Matrices

Aurélien Falco , Emmanuel Agullo , Luc Giraud , Guillaume Sylvand

Sparse Days 2018, Sep 2018, Toulouse, France

Communication dans un congrès hal-01999895v1

Soft Error in PCG: Sensitivity, Numerical Detections and Possible Recoveries

Emmanuel Agullo , Luc Giraud , Emrullah Fatih Yetkin

SIAM Conference on Computational Science and Engineering, CSE'17, Feb 2017, Atlanta, United States

Communication dans un congrès hal-01670189v1

Robust coarse spaces for abstract Schwarz preconditioners via generalized eigenproblems

Emmanuel Agullo , Luc Giraud , Louis Poirel

International conference on domain decomposition methods, DD24, Feb 2017, Svalbard, Norway

Communication dans un congrès hal-01670178v1

Soft Error in Classical PCG and its Variants: Sensitivity, Numerical Detections and Possible Recovery Policies

Emmanuel Agullo , Siegfried Cools , Luc Giraud , Wim Vanroose , Emrullah Fatih Yetkin

SIAM Annual meeting 2017, AN'17, Jul 2017, Pittsburgh, United States

Communication dans un congrès hal-01670198v1

Two New Block Krylov Methods for Linear Systems with Multiple Right-hand Sides

Yan-Fei Jing , Emmanuel Agullo , Bruno Carpentieri , Luc Giraud , Ting-Zhu Huang

IMA Conference on Numerical Linear Algebra and Optimization, Sep 2016, Birmingham, United Kingdom

Communication dans un congrès hal-01334648v1

Task-based sparse hybrid linear solver for distributed memory heterogeneous architectures

Emmanuel Agullo , Luc Giraud , Stojce Nakov

HeteroPar'2016 worshop of Euro-Par, Aug 2016, Grenoble, France

Communication dans un congrès hal-01334738v1

Coarse Grid Correction for Algebraic Domain Decomposition Solvers

Louis Poirel , Emmanuel Agullo , Luc Giraud

ECCOMAS Congress 2016, Jun 2016, Hersonissos, Greece

Communication dans un congrès hal-01355534v1

Soft errors in PCG: detection and correction

Emmanuel Agullo , Siegfried Cools , Luc Giraud , Wim Vanroose , Emrullah Fatih Yetkin

SIAM Conference on Parallel Processing for Scientific Computing (SIAM PP 2016), Apr 2016, Paris, France

Communication dans un congrès hal-01301240v1

Semi-Algebraic Coarse Space for Parallel Sparse Hybrid Solvers

Emmanuel Agullo , Louis Poirel , Luc Giraud

Journée Calcul Haute Performance et Décomposition de Domaines, Apr 2016, Paris, France

Communication dans un congrès hal-01440792v1

Task-based Conjugate Gradient: from multi-GPU towards heterogeneous architectures

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Stojce Nakov , Jean Roman

HeteroPar'2016 worshop of Euro-Par, Aug 2016, Grenoble, France. ⟨10.1007/978-3-319-58943-5⟩

Communication dans un congrès hal-01334734v1

Combining Software Pipelining with Numerical Pipelining in the Conjugate Gradient Algorithm

Emmanuel Agullo , Luc Giraud , Stojce Nakov

SIAM Conference on Parallel Processing for Scientific Computing (SIAM PP 2016), Apr 2016, Paris, France

Communication dans un congrès hal-01301237v1

Coarse Grid Correction for the MaPHyS Algebraic Domain Decomposition Solver

Emmanuel Agullo , Luc Giraud , Louis Poirel

Sparse Days 2016, Jun 2016, Toulouse, France

Communication dans un congrès hal-01440803v1
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On rounding error resilience, maximal attainable accuracy and parallel performance of the pipelined Conjugate Gradients method for large-scale linear systems in PETSc

Siegfried Cools , Wim Vanroose , Emrullah Fatih Yetkin , Emmanuel Agullo , Luc Giraud

EASC 2016 - Exascale Applications and Software Conference, Apr 2016, Stockholm, Sweden. pp.1-10, ⟨10.1145/2938615.2938621⟩

Communication dans un congrès hal-01734422v1

Numerical fault tolerant strategies for resilient parallel eigensolvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Mawussi Zounon

IMA Conference on Numerical Linear Algebra and Optimization, Sep 2016, Birmingham, United Kingdom

Communication dans un congrès hal-01334631v1

Hard faults and soft errors: possible numerical remedies in linear algebra solvers

Emmanuel Agullo , Siegfried Cools , Luc Giraud , Alexandre Moreau , Pablo Salas et al.

VecPar - International meeting on High Performance Computing for Computational science, Jun 2016, Porto, Portugal

Communication dans un congrès hal-01334675v1

On Resiliency in Krylov Solvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Emrullah Fatih Yetkin , Mawussi Zounon

PACS'15: Plateform for Advanced Scientific Computing Conference, Jun 2015, Zurich, Switzerland

Communication dans un congrès hal-01162618v1

On Numerical Resiliency in Numerical Linear Algebra Solvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Emrullah Fatih Yetkin , Mawussi Zounon

Salishan Conference on High-Speed Computing, DOE laboratories, Apr 2015, Salishan, United States

Communication dans un congrès hal-01162627v1

H-matrix techniques for parallel hybrid solvers

Emmanuel Agullo , Eric Darve , Yuval Harness , Luc Giraud

CIMI Workshop on Fast Direct Solvers, Jun 2015, Toulouse, France

Communication dans un congrès hal-01215344v1

Data sparse techniques for parallel hybrid solvers

Emmanuel Agullo , Eric Darve , Luc Giraud , Yuval Harness

SIAM Conference on Applied Linear Algebra (SIAM LA 2015), Apr 2015, Atlanta, United States

Communication dans un congrès hal-01256230v1
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On the resilience of parallel sparse hybrid solvers

Emmanuel Agullo , Luc Giraud , Mawussi Zounon

HiPC 2015 - IEEE International Conference on High Performance Computing, Dec 2015, Bangalore, India

Communication dans un congrès hal-01256316v2

Reliability of Checksum based Detection for Soft Errors in Conjugate Gradient Variants

Emmanuel Agullo , Luc Giraud , Emrullah Fatih Yetkin

SIAM Conference on Computational Science and Engineering (SIAM CSE 2015), Mar 2015, Salt Lake city, Utah, United States

Communication dans un congrès hal-01200706v1

H-Matrix Solver for FEM/BEM

Emmanuel Agullo , Aurélien Falco , Luc Giraud , Benoît Lizé , Guillaume Sylvand

CIMI Workshop on Fast Direct Solvers, Jun 2015, Toulouse, France

Communication dans un congrès hal-01215345v1

Preliminary Investigations on Resilient Parallel Numerical Linear Algebra Solvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Emrullah Fatih Yetkin , Mawussi Zounon

SIAM Workshop on Exascale Applied Mathematics Challenges and Opportunities, Jul 2014, Chicago, United States

Communication dans un congrès hal-01018763v1

Recover-Restart Strategies for Resilient Parallel Numerical Linear Algebra Solvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Mawussi Zounon

International Workshop on Parallel Matrix Algorithms and Applications (PMAA 2014), Jul 2014, Lugano, Switzerland

Communication dans un congrès hal-01058138v1

Some progresses in parallel numerical linear algebra toward extreme scale

Luc Giraud

Séminaire : Mesocentre de calcul de l'Ecole Centrale Paris (Session sur les méthodes de résolution des sytèmes linéaires), Ecole Centrale Paris, Dec 2014, Paris, France

Communication dans un congrès hal-01120201v1

Recovery-Restart Techniques for Resilient Krylov Methods

Emmanuel Agullo , Luc Giraud , Salas Pablo , Mawussi Zounon

SIAM Conference on Parallel Processing for Scientific Computing (SIAM PP 2014), Feb 2014, Portland, United States

Communication dans un congrès hal-01062232v1

Toward parallel scalable linear solvers suited for large scale hierarchical parallel platforms

Emmanuel Agullo , Mathieu Faverge , Luc Giraud , Abdou Guermouche , Pierre Ramet et al.

World Congress on Computational Mechanics, Jul 2014, Barcelona, Spain

Communication dans un congrès hal-00987110v1

Some Progresses on Krylov Linear Solvers: Block-variants and Resiliency

Emmanuel Agullo , Luc Giraud , Yan-Fei Jing , Pablo Salas , Emrullah Fatih Yetkin et al.

Argonne Mathematics and Computer Science Seminar, Jul 2014, Lemont, United States

Communication dans un congrès hal-01018761v1

Parallel hybrid linear solvers

Luc Giraud

4ème Ecole Thématique de Simulation Numérique, CEA, Apr 2014, Porquerolles, France

Communication dans un congrès hal-01118437v1

Recover-Restart Strategies for Resilient Parallel Numerical Linear Algebra Solvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Mawussi Zounon

Householder Symposium XIX, Jun 2014, Spa, Belgium

Communication dans un congrès hal-01018760v1

Resilience at extreme scale : system level, algorithmic level or both?

Luc Giraud , Franck Cappello

SIAM Conference on Computational Science and Engineering (SIAM CSE 2013), Feb 2013, Boston, United States

Communication dans un congrès hal-00799309v1

Parallel local time-stepping for elastodynamic equations

Yohann Dudouit , Luc Giraud , Florence Millot , Sébastien Pernet

Conference on Mathematical and Computational Issues in the Geosciences, SIAM, Jun 2013, Padua, Italy

Communication dans un congrès hal-00933533v1

Algebraic preconditioners for parallel hybrid solvers

Luc Giraud

High Performance Computing in Science and Engineering, May 2013, Ostrava, Czech Republic

Communication dans un congrès hal-00933517v1

Eigensolvers for thermoacoustics instabilities in combustion chambers

Luc Giraud , Pablo Salas , Xavier Vasseur

SIAM Conference on Computational Science and Engineering (SIAM CSE 2013), SIAM, Feb 2013, Boston, United States

Communication dans un congrès hal-00933498v1

Towards resilient parallel linear Krylov solvers with recover-restart strategies

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman

European Numerical Mathematics and Advanced Applications, Aug 2013, Lausanne, Switzerland

Communication dans un congrès hal-00933640v1

Pipelining the CG Solver Over a Runtime System

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Stojce Nakov , Jean Roman

GPU Technology Conference, NVIIDA, Mar 2013, San Jose, United States

Communication dans un congrès hal-00934948v1
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Towards Domain Decomposition with Balanced Halo

Astrid Casadei , Luc Giraud , Pierre Ramet , Jean Roman

Workshop Celebrating 40 Years of Nested Dissection, Jul 2013, Waterloo, Canada

Communication dans un congrès hal-00924977v1

Towards resilient parallel linear Krylov solvers: recover-restart strategies

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman , Mawussi Zounon

Sparse days 2013, CERFACS, Jun 2013, Toulouse, France

Communication dans un congrès hal-00935685v1

Towards resilient Krylov solvers

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman , Mawussi Zounon

SIAM Conference on Applied Linear Algebra (SIAM LA 2012), SIAM, Jun 2012, Valencia, Spain

Communication dans un congrès hal-00719534v1

On a Hierarchical Parallel Algebraic Domain Decomposition Linear Solver

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Stojce Nakov , Jean Roman

Scalable Hierarchical Algorithms for eXtreme Computing (SHAX-C) Workshop, Apr 2012, Kaust, Saudi Arabia

Communication dans un congrès hal-00726630v1
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Physically-based preconditioner for the WCIP

Nathalie Raveu , Julien Vincent , Jean-René Poirier , Ronan Perrussel , Luc Giraud

Asia-Pacific Microwave Conference (APMC 2012), Dec 2012, Kaohsiung, Taiwan. pp. 1310 - 1312, ⟨10.1109/APMC.2012.6421905⟩

Communication dans un congrès hal-00907360v1

Pipelining the CG Solver Over a Runtime System

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Stojce Nakov , Jean Roman

International Workshop on Parallel Matrix Algorithms and Applications (PMAA 2012), Jun 2012, London, United Kingdom

Communication dans un congrès hal-00726652v1

On a hierarchical parallel algebraic domain decomposition linear solver

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Yan-Fei Jing , Stojce Nakov et al.

Aquitaine-Euskadi Workshop on Applied Mathematics, Jun 2012, Bilbao, Spain

Communication dans un congrès hal-00719527v1

Comparison of two sparse hybrid solvers

Emmanuel Agullo , Luc Giraud , Azzam Haidar , Matthieu Lecouvez , Xiaoye S. Li et al.

SIAM Conference on Parallel Processing for Scientific Computing (SIAM PP 2012), SIAM, Feb 2012, Savannah, United States

Communication dans un congrès hal-00719544v1

On a parallel hierarchical algebraic domain decomposition method for a large scale sparse linear solver

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman

SIAM Conference on Applied Linear Algebra (SIAM LA 2012), SIAM, Jun 2012, Valencia, Spain

Communication dans un congrès hal-00719537v1

Parallel algebraic domain decomposition solver for the solution of augmented systems

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman

The Second International Conference on Parallel, Distributed, Grid and Cloud Computing for Engineering, Apr 2011, Ajaccio, France

Communication dans un congrès hal-00652931v1

Algebraic Schwarz preconditioning for the Schur complement: application to the time-harmonic Maxwell equations discretized by a discontinuous Galerkin method

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman et al.

The Twentieth International Conference on Domain Decomposition Methods, Feb 2011, San Diego La Jolla, United States

Communication dans un congrès inria-00577639v1

Stability of azimuthal modes in annular combustion chambers

Pablo Salas , Luc Giraud , Jens-Dominik Müller , Gabriel Staffelbach , Thierry Poinsot

Third workshop INCA, Nov 2011, Toulouse, France

Communication dans un congrès hal-00651847v1

Performance of a sparse hybrid linear solver on a multicore cluster

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Yohan Lee-Tin-Yien et al.

SIAM Conference on Computational Science and Engineering (CSE 2011), Feb 2011, Reno, United States

Communication dans un congrès inria-00548911v1

WCIP acceleration

Nathalie Raveu , Luc Giraud , Henri Baudrand

Asia Pacific Microwave Conference, Dec 2010, Yokohama, Japan

Communication dans un congrès inria-00551035v1

Complexity analysis of sparse hybrid linear solvers

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman

3rd ''Scheduling in Aussois'' Workshop, Jun 2010, Aussois, France

Communication dans un congrès inria-00549221v1

Towards a complexity analysis of sparse hybrid linear solvers

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman

Para 2010 : State of the Art in Scientific and Parallel Computing, Jun 2010, Reykjavík, Iceland

Communication dans un congrès inria-00548913v1

Solveurs parallèles creux hybrides direct/itératif : application à des simulations 3D

Emmanuel Agullo , Azzam Haidar , Luc Giraud , Abdou Guermouche , Yohan Lee-Tin-Yien et al.

Workshop Solveurs de systèmes linéaires de grande taille : les avancées récentes, Nov 2010, Lyon, France

Communication dans un congrès inria-00549144v1

Algebraic parallel domain decomposition solver

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Yohan Lee-Tin-Yien et al.

Journée GNR MOMAS / GDR Calcul, May 2010, Paris, France

Communication dans un congrès inria-00549132v1

MaPHyS or the development of a parallel algebraic domain decomposition solver in the course of the solstice project

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman

Sparse Days 2010 Meeting at CERFACS, Jun 2010, Toulouse, France

Communication dans un congrès inria-00548915v1

Parallel scalability and complexity analysis of sparse hybrid linear solvers

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman

6th International Workshop on Parallel Matrix Algorithms and Applications (PMAA'10), Jun 2010, Basel, Switzerland

Communication dans un congrès inria-00549126v1

Parallel algebraic hybrid linear solver for frequency domain acoustic wave modeling

Hafedh Ben-Hadj-Ali , Luc Giraud , Azzam Haidar , Stéphane Operto , Jean Virieux

SIAM conference on Applied Linear Algebra, SIAM, Oct 2009, Monterey Bay, United States

Communication dans un congrès hal-00719553v1
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3D frequency-domain finite-difference modeling of acoustic wave propagation using a massively parallel direct solver: a feasibility study

Stéphane Operto , Jean Virieux , Patrick Amestoy , Luc Giraud , Jean-Yves L'Excellent

SEG 2006 - 76th International Exposition and Annual Meeting, Oct 2006, New Orleans, United States. pp.2265-2269, ⟨10.1190/1.2369987⟩

Communication dans un congrès hal-00408484v1

An Overview of the GRID-TLSE Project

Michel Daydé , Luc Giraud , M. Hernandez , Jean-Yves L'Excellent , Marc Pantel et al.

VECPAR'04, Universidad Politécnica de Valencia, Jun 2004, Valence, Spain

Communication dans un congrès hal-00688814v1

Deflation and augmentation techniques in Krylov linear solvers

Olivier Coulaud , Luc Giraud , Pierre Ramet , Xavier Vasseur

Topping, B.H.V and Ivanyi, P. Developments in Parallel - Distributed - Grid and Cloud Computing for Engineering, Saxe-Coburg Publications, pp.249--275, 2013, 978-1-874672-62-3

Chapitre d'ouvrage hal-00860339v1

Euro-Par’ 99 Parallel Processing : 5th International Euro-Par Conference Toulouse, France, August 31–September 3, 1999 Proceedings

Patrick Amestoy , Philippe Berger , Michel Daydé , Daniel Ruiz , Iain Duff et al.

5th International Euro-Par Conference on Parallel Processing (1999), 1685, Springer, 1999, Lecture Notes in Computer Science (LNCS), 978-3-540-66443-7. ⟨10.1007/3-540-48311-X⟩

Proceedings/Recueil des communications hal-04500452v1