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authFullName_s : Alfredo Buttari
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Pre-exascale Architectures: OpenPOWER Performance and Usability Assessment for French Scientific Community

Gabriel Hautreux , Alfredo Buttari , Arnaud Beck , Victor Cameo , Dimitri Lecas et al.
ISC High Performance 2017: High Performance Computing, 2017, Frankfurt, Germany. pp.309-324, ⟨10.1007/978-3-319-67630-2_23⟩
Conference papers hal-02129651v1
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Block low-rank compression in mixed precision for the solution of sparse linear systems

Matthieu Gerest , Patrick Amestoy , Olivier Boiteau , Alfredo Buttari , Fabienne Jézéquel et al.
Sparse Days conference 2022, Jun 2022, Saint-Girons, France.
Conference poster hal-03780548v1
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Does 3D frequency-domain FWI of full-azimuth/long-offset OBN data feasible? The Gorgon case study

S. Operto , Patrick Amestoy , Hossein Aghamiry , Stephen Beller , Alfredo Buttari et al.
2023
Preprints, Working Papers, ... hal-03922986v1

Parallel tiled QR factorization for multicore architectures

Alfredo Buttari , Julien Langou , Jakub Kurzak , Jack Dongarra
Concurrency and Computation: Practice and Experience, 2008, 20 (13), ⟨10.1002/cpe.v20:13⟩
Journal articles hal-02421078v1

The PlayStation 3 for High-Performance Scientific Computing

Jakub Kurzak , Alfredo Buttari , Piotr Luszczek , Jack J. Dongarra
Computing in Science and Engineering, 2008, 10 (3), pp.84-87. ⟨10.1109/MCSE.2008.85⟩
Journal articles hal-02421063v1

Using Mixed Precision for Sparse Matrix Computations to Enhance the Performance while Achieving 64-bit Accuracy

Alfredo Buttari , Jack J. Dongarra , Jakub Kurzak , Piotr Luszczek , Stanimir Tomov et al.
ACM Transactions on Mathematical Software, 2008, 34 (4), pp.1-22. ⟨10.1145/1377596.1377597⟩
Journal articles hal-02421028v1
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Adversarial attacks via Sequential Quadratic Programming

Théo Beuzeville , Alfredo Buttari , Serge Gratton , Theo Mary , Erkan Ulker et al.
2022
Preprints, Working Papers, ... hal-03752184v1

Accelerating scientific computations with mixed precision algorithms

Marc Baboulin , Alfredo Buttari , Jack J. Dongarra , Jakub Kurzak , Julie Langou et al.
Computer Physics Communications, 2009, 180 (12), pp.2526-2533. ⟨10.1016/j.cpc.2008.11.005⟩
Journal articles hal-02420940v1

Towards a parallel analysis phase for a multifrontal sparse solver

Patrick Amestoy , Alfredo Buttari , Jean-Yves L'Excellent
5th International Workshop on Parallel Matrix Algorithms and Applications (PMAA 2008), Jun 2008, Neuchâtel, Switzerland
Conference papers hal-00803488v1
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INTEGRAL/SPI data segmentation to retrieve sources intensity variations

Laurent Bouchet , Patrick Amestoy , Alfredo Buttari , François-Henry Rouet , Maxime Chauvin et al.
Astronomy and Astrophysics - A&A, 2013, vol. 555 (n° A55), pp. 1-22. ⟨10.1051/0004-6361/201219605⟩
Journal articles hal-01124774v1
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Fine-Grained Multithreading for the Multifrontal QR Factorization of Sparse Matrices

Alfredo Buttari
SIAM Journal on Scientific Computing, 2013, vol. 35 (n° 4), pp. 323-345. ⟨10.1137/110846427⟩
Journal articles hal-01122471v1
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Grouping variables in Frontal Matrices to improve Low-Rank Approximations in a Multifrontal Solver

Clement Weisbecker , Patrick Amestoy , Cleve Ashcraft , Olivier Boiteau , Alfredo Buttari et al.
International Conference On Preconditioning Techniques For Scientific And Industrial Applications (PRECONDITIONING 2011), INRIA Bordeaux Sud-Ouest; ENSEIRB; University of Bordeaux 1, May 2011, Bordeaux, France
Conference papers inria-00581561v1

Shared memory parallelism and low-rank approximation techniques applied to direct solvers in FEM simulation (regular paper)

Patrick Amestoy , Olivier Boiteau , Alfredo Buttari , Guillaume Joslin , Jean-Yves L'Excellent et al.
19th IEEE International Conference on the Computation of Electromagnetic Fields (COMPUMAG 2013), International Compumag Society (ICS) Technical Co-Sponsorship - IEEE Magnetics Society, Jun 2013, Budapest, Hungary. ⟨10.1109/TMAG.2013.2284024⟩
Conference papers hal-00924660v1

Solving linear systems efficiently using mixed-precision Block Low-Rank compression

Patrick Amestoy , Olivier Boiteau , Alfredo Buttari , Matthieu Gerest , Fabienne Jézéquel et al.
Rencontres Arithmétique de l'informatique Mathématique (RAIM 2021), GdR GdR IM : Informatique Mathématique, May 2021, Paris, France
Conference papers hal-03783037v1

Solving Systems of Linear Equations on the CELL Processor Using Cholesky Factorization

Jakub Kurzak , Alfredo Buttari , Jack Dongarra
IEEE Transactions on Parallel and Distributed Systems, 2008, 19 (9), pp.1175-1186. ⟨10.1109/TPDS.2007.70813⟩
Journal articles hal-02421046v1

A Tridiagonalization Method for Symmetric and Quasi-Definite Saddle-Point Systems (CM 2018, Colorado, USA)

Alfredo Buttari , Dominique Orban , Daniel Ruiz , David Titley-Peloquin
15th Copper Mountain Conference On Iterative Methods (CM 2018), Front Range Scientific Computations, Inc, Boulder, Colorado; University of Colorado, Sandia National Labs; Emory University; Society for Industrial and Applied Mathematics: SIAM Activity Group on Linear Algebra, Mar 2018, Copper Mountain, Colorado, United States
Conference papers hal-03023422v1
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Adversarial attacks via backward error analysis

Théo Beuzeville , Pierre Boudier , Alfredo Buttari , Serge Gratton , Théo Mary et al.
2021
Preprints, Working Papers, ... hal-03296180v3

Mixed precision sparse direct solver applied to 3D wave propagation

Patrick Amestoy , Alfredo Buttari , Florian Faucher , Jean-Yves L'Excellent , Matthieu Gerest et al.
8th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2022), Jun 2022, Oslo, Norway
Conference papers hal-03887660v1
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Implementing multifrontal sparse solvers for multicore architectures with Sequential Task Flow runtime systems

Emmanuel Agullo , Alfredo Buttari , Abdou Guermouche , Florent Lopez
ACM Transactions on Mathematical Software, 2016, ⟨10.1145/2898348⟩
Journal articles hal-01333645v1
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Task-based multifrontal QR solver for GPU-accelerated multicore architectures

Emmanuel Agullo , Alfredo Buttari , Abdou Guermouche , Florent Lopez
[Research Report] IRI/RT--2015--02--FR-r1, IRIT, Toulouse. 2015
Reports hal-01166312v2
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Robust memory-aware mappings for parallel multifrontal factorizations

Emmanuel Agullo , Patrick Amestoy , Alfredo Buttari , Abdou Guermouche , Jean-Yves L'Excellent et al.
SIAM Journal on Scientific Computing, 2016, 38 (3), pp.C256 - C279. ⟨10.1137/130938505⟩
Journal articles hal-01334113v2
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Scalability of parallel sparse direct solvers: methods, memory and performance

Alfredo Buttari
Distributed, Parallel, and Cluster Computing [cs.DC]. Toulouse INP, 2018
Habilitation à diriger des recherches tel-01913033v1

A class of parallel tiled linear algebra algorithms for multicore architectures

Alfredo Buttari , Julien Langou , Jakub Kurzak , Jack J. Dongarra
Parallel Computing, 2009, 35 (1), pp.38-53. ⟨10.1016/j.parco.2008.10.002⟩
Journal articles hal-02420965v1

Reducing communications and memory costs of parallel Block Low-Rank solvers

Patrick Amestoy , Olivier Boiteau , Alfredo Buttari , Matthieu Gerest , Fabienne Jézéquel et al.
SIAM Conference on Computational Science and Engineering (CSE 2023), Feb 2023, Amsterdam, Netherlands
Conference papers hal-03922334v1
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Task-Based Parallel Programming for Scalable Algorithms: application to Matrix Multiplication

Emmanuel Agullo , Alfredo Buttari , Abdou Guermouche , Julien Herrmann , Antoine Jego et al.
[Research Report] RR-9461, Inria Bordeaux - Sud-Ouest. 2022, pp.29
Reports hal-03588491v2
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Bridging the gap between flat and hierarchical low-rank matrix formats: the multilevel BLR format

Patrick Amestoy , Alfredo Buttari , Jean-Yves L'Excellent , Théo Mary
SIAM Journal on Scientific Computing, 2019, 41 (3), pp.A1414-A1442. ⟨10.1137/18M1182760⟩
Journal articles hal-01774642v3
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Improving multifrontal methods by means of block low-rank representations

Patrick Amestoy , Cleve Ashcraft , Olivier Boiteau , Alfredo Buttari , Jean-Yves L'Excellent et al.
[Research Report] INRIA RR-8199, INRIA. 2013
Reports hal-00776859v1
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Shared memory parallelism and low-rank approximation techniques applied to direct solvers in FEM simulation

Patrick Amestoy , Alfredo Buttari , Guillaume Joslin , Jean-Yves L'Excellent , Mohamed Sid-Lakhdar et al.
IEEE Transactions on Magnetics, 2014, vol. 50 (n° 2), pp. 1-4. ⟨10.1109/TMAG.2013.2284024⟩
Journal articles hal-01123557v1

Improving Multifrontal Methods by Means of Block Low-Rank Representations

Patrick Amestoy , Cleve Ashcraft , Olivier Boiteau , Alfredo Buttari , Jean-Yves L'Excellent et al.
SIAM Journal on Scientific Computing, 2015, 37 (3), pp.A1451-A1474. ⟨10.1137/120903476⟩
Journal articles hal-01237169v1
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A Novel Aggregation Method based on Graph Matching for Algebraic MultiGrid Preconditioning of Sparse Linear Systems

Pasqua d'Ambra , Alfredo Buttari , Daniela Di Serafino , Salvatore Filippone , Simone Gentile et al.
International Conference On Preconditioning Techniques For Scientific And Industrial Applications (PRECONDITIONING 2011), INRIA Bordeaux Sud-Ouest; ENSEIRB; University of Bordeaux 1, May 2011, Bordeaux, France
Conference papers inria-00580434v1