Cerfacs Enter the world of high performance ...

The 15 February 2019 at 14h00

Wide Interest Seminar – Pierre KESTENER (CEA)

Jean-Christophe JOUHAUD |  Salle de conférence Jean-Claude ANDRE - CERFACS |  

Multi-architecture implementation of Spectral Difference Methods (SDM) for compressible flows using performance portable programing tools (c++ kokkos)

One of the most difficult techonological challenge associated with the so called exascale race is the design of an hardware architecture much more energy efficient than usual ones. For at least the next five years, all the competitors (US, China, Japan, Europe) are putting hard work at designing homegrown processor technology (e.g. 64bit ARM CPU in Japan or Sunway processor in China). The diversity of already available as well as coming processor architectures constitutes a heavy burden for high performance and parallel software developper at choosing the right software programing tools. While directive based programing approaches (OpenMP / OpenACC) are well suited to porting large legacy codes, new library based programing tools, mostly written in C++, provide an alternative approach for designing hardware-aware high-level parallel applications.

In this talk, I will report on using the C++ Kokkos library (and MPI) for designing a new multi-architecture performance portable implementation of the high-order spectral difference methods (SDM) numerical schemes familly used in compressible hydrodynamics. I will first introduce the Kokkos library in the context of other performance portable tools, the I’ll give some details of our implementation, example of applications in astrophysical context as well as show performance measurements on several hardware platforms (Intel Skylake, KNL, ARM ThunderX2 and several Nvidia GPU processors).


Young PhD day

Brigitte Yzel |  19 February 2020

Cerfacs organizes its 5th edition of the Cerfacs Doctoral Students Day on Monday, May 11, 2020. This day will be an opportunity for each doctoral student to present his or her research subject in front of an audience of Cerfacs researchers but also representatives of our industrial and academic partners, as well as selected external guests. Great novelty this year, 10 students have the privilege to participate in a specific training course such as "My thesis in 180 seconds", in order to present their research topic in French and in simple terms. The day will end with the selection of the : best poster, and the best MT180 presentation.Read more

A researcher of CERFACS guest during the France Culture radio show « La méthode scientifique » this week

superadmin |  20 January 2020

Mélanie Rochoux,  a researcher at Cerfacs working on wildfire spread modeling at the interface between CFD simulations and data science, is invited to the France Culture radio show « La méthode scientifique » next Wednesday to talk about megafires. Who are they? How are they formed? What are their impacts? How science can provide insights? The radio show is on Wednesday, January 22nd at 4:00 pm on the France Culture's channel.Read more