Post-Doctoral Research Visit F/M Topology-aware, contention-adapted, hierarchical data partitioner for mesh based simulations Ajouter aux favoris

A propos du centre ou de la direction fonctionnelle

The Inria research centre in Lyon is the 9th Inria research centre, formally created in January 2022. It brings together approximately 410 people in 20 research teams and research support services.

Its staff are distributed in Villeurbanne, Lyon Gerland, and Saint-Etienne.

The Lyon centre is active in the fields of software, distributed and high-performance computing, embedded systems, quantum computing and privacy in the digital world, but also in digital health and computational biology.

Contexte et atouts du poste

This postdoc position is announced within the collaboration between Inria Lyon (ROMA team) and Simula (High Performance Computing Department) Norway.

Location

Inria Lyon, ROMA team. The ROMA team aims at designing models, algorithms, and scheduling strategies to optimize the execution of scientific applications on High-Performance Computing platforms.

Research topic

Real-world applications of finite element mesh (FEM) simulations require parallel computing. In such a setting, computational meshes must be partitioned among multiple processes as a first step. One important goal of mesh partitioning is to keep the resulting inter-process communication overhead low while achieving load balance for scalability.

The current state-of-the-art and mainstream approaches treat mesh partitioning as a graph or hypergraph partitioning problem, which is then tackled by using well-known libraries. The common goal of these libraries is to minimize the total volume of inter-process communication; some additional objectives such as the total number of communication operations are sometimes addressed in an ad hoc manner. The aim of this post-doc position is to define accurate communication-cost objective functions for parallelizing FEM simulations in the current HPC systems while taking the topology of the targeted systems into account, and then to develop a mesh partitioner for reducing the communication cost. Generality in the partitioner will be achieved by using graph models, and developing algorithms on those models.

Mission confiée

The post-doc will collaborate with Bora Uçar from the Inria team ROMA, and also Xing Cai and James Trotter from Simula. The post-doc will have access to multiple computing resources available at both Inria and Simula, and will be interacting with other researchers developing known libraries for parallel finite element simulations.

Principales activités

The post-doc will formulate topology-aware and contention-adapted communication cost functions, and conceive algorithms for partitioning data in mesh-based simulations to address the identified cost function.

Compétences

• Applicants should hold a PhD in Computer Science, or a related discipline.
• Some experience in graph and hypergraph partitioning, or finite element simulations is preferred but not required.
• Excellent writing and presentation skills.
• We encourage mobility. The postdoctoral position must take place in a scientific environment that is different from that of the Ph.D. (and, if applicable, from the job held since the Ph.D.); particular attention is thus paid to French or international candidates who obtained their doctorate abroad.

Avantages

• Subsidized meals
• Partial reimbursement of public transport costs
• Leave: 7 weeks of annual leave + 10 extra days off due to RTT (statutory reduction in working hours) + possibility of exceptional leave (sick children, moving home, etc.)
• Possibility of teleworking (90 days / year) and flexible organization of working hours
• Social, cultural and sports events and activities
• Access to vocational training
• Social security coverage

Rémunération

2788 euros gross salary / month