Français Anglais
Accueil Annuaire Plan du site
Accueil > Evenements > Séminaires
Séminaire d'équipe(s) ParSys
Task-based multifrontal QR solver for heterogeneous architectures
Alfredo Buttari

19 January 2016, 10h30
Salle/Bat : 465/PCRI-N
Contact :

Activités de recherche : Calcul à haute performance

Résumé :
In this work we investigate the design of task-based sparse direct
solvers which constitute extremely irregular workloads, with tasks of
different granularities and characteristics with variable memory
consumption on top of runtime systems. We prove the usability and
effectiveness of our approach with the implementation of a sparse
matrix multifrontal factorization based on a Sequential Task Flow
parallel programming model. Using this programming model, we developed
features such as the integration of dense 2D Communication Avoiding
algorithms in the multifrontal method allowing for better scalability
compared to the original approach used in the qr_mumps solver.
Following this approach, we address heterogeneous architectures where
task granularity and scheduling strategies are critical to achieve
performance. We present, for the multifrontal method, a hierarchical
strategy for data partitioning and a scheduling algorithm capable of
handling the heterogeneity of resources.

Pour en savoir plus : https://parsys.lri.fr/seminar.html
Séminaires
Programmation mathématique multi-objectif pour la
Thursday 13 December 2018 - 14h30
Salle : unknown - unknown
Audrey Legendre .............................................

Redundancy in Distributed Proofs
Algorithmique distribuée
Tuesday 04 December 2018 - 00h00
Salle : 465 - PCRI-N
Ami Paz .............................................

Some recent results on the integer linear programm
Théorie des graphes
Friday 30 November 2018 - 00h00
Salle : 445 - PCRI-N
Hung Nguyen .............................................

Scalable and exhaustive screening of metabolic fun
Wednesday 28 November 2018 - 11h00
Salle : 465 - PCRI-N
Clémence Frioux .............................................

Studying the three-dimensional structure of DNA fr
Thursday 22 November 2018 - 15h00
Salle : unknown - unknown
Nelle Varoquaux .............................................