Chemseddine CHOHRA

PhD student
chemseddine.chohra@univ-perp.fr

Chemseddine CHOHRA
 

My name is Chemseddine CHOHRA, I′m from Algeria. I′m currently living in France and exactly in Perpignan. I′m working on my PhD thesis in Computer Science since september 2013, at the University of Perpignan Via Domitia (UPVD) in the team DALI (Digits, Architectures et Logiciels Informatique) and laboratory LIRMM (Laboratoire d′Informatique, de Robotique et de Microélectronique de Montpellier).
In my free times I like to practice sports, play video games or watch movies.
After my studies I would like to return to my country and ... do something there.

The title of my PhD thesis is ″numerical reproducibility for exascale HPC″. I′m working under the supervision of Philippe LANGLOIS and David PARELLO to solve the problem of non-reproducibility of numerical results. Therefore we aim to use recent precise summation algorithms to ensure the correct rounding and accordingly reproducible results of linear algebra subroutines.
Here are some generic key words to describe my interest area :

  • Precision
  • Floating-point arithmetic
  • BLAS
  • Linear algebra
  • Performance
  • HPC

Publications.

Chemseddine Chohra, Philippe Langlois and David Parello. Level 1 Parallel RTN-BLAS: Implementation and Efficiency Analysis. In SCAN2014 16th GAMM-IMACS International Symposium on Scientific Computing, Computer Arithmetic and Validated Numerics, Wurzburg, Germany, September 2014 [hal | .pdf].

Chemseddine Chohra, Philippe Langlois, and David Parello. Efficiency of Reproducible Level 1 BLAS. In SCAN 2014 Post-Conference Proceedings, Lecture Notes of Computer Science, pages 1--10, July 2015. [hal | .pdf]

Talks.

Chemseddine Chohra, Philippe Langlois and David Parello. Reproducible level 1 on massively parallel systems. Presented at RAIM 2015 7th edition of Rencontres Arithmétiques de l’Informatique Mathématique, Rennes, France, April 2015 [.pdf].

Chemseddine Chohra, Philippe Langlois and David Parello. Level 1 Parallel RTN-BLAS: Implementation and Efficiency Analysis. Presented at SCAN2014 16th GAMM-IMACS International Symposium on Scientific Computing, Computer Arithmetic and Validated Numerics, Wurzburg, Germany, September 2014 [hal | .pdf].

Khaled Halimi, Abdelaziz Khaled and Chemseddine Chohra. L’analyse Sémantique des Réseaux Sociaux pour les Environnements d’Apprentissage. (Presented by Abdelaziz Khaled) at "La deuxième Journée Nationale des Sciences et Technologies de l’Information et de la Communication" (JSTIC’2013), Guelma, Algeria, July 2013 [.pptx].

Work.

 
 
  • UPVDoc
  • UPVDoc
  • UPVDoc

UPVDoc

Overview:

An association that has been created in 2008 at the University of Perpignan . It proposes scientific events and activities to allow PhD students to discuss, exchange and discover that they are not alone.

My Contribution:

  • User Interface Design (HTML/CSS)
  • Database management (MySQL)

Coworkers:

Year: 2014
See it live
 
  • rtnBLAS
  • rtnBLAS

rtnBLAS

Overview:

A library that provids user with a correctly rounded implementation of BLAS interface. For this we use the most efficient and recent algorithms of summation.

My Contribution:

  • Algorithms and coding
  • Test and validation

Coworkers:

Year: 2015
Download
 
UPVDoc UPVDoc
rtnBLAS rtnBLAS

Contact.

Contact me :

© Copyright 2014 Chemseddine CHOHRA

 18 bis, F102, Avenue Alfred Sauvy, residence universitaire Canigou, 66100, Perpignan
 Office : +33 430 19 81 24
Personal : +33 668 72 30 78
chemseddine.chohra@univ-perp.fr
chohra.chemseddine@yahoo.com