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Lecture by Prof. Baboulin on HPC :"Using GPU computing in iterative solvers for sparse linear systems"

Outline

Speaker
Professor Marc Baboulin
Director of the Computer Science Department, University of Paris-Sud
Date:
August 18st (Thu), 2016
Time:
11:00-12:00am
Place:
National Institute of Informatics
12F, Room 1212 (Lecture Room 1)
Title:
Using GPU computing in iterative solvers for sparse linear systems.
Abstract:
We illustrate how Graphics Processing Units (GPU) can be used to accelerate iterative solvers based on Krylov subspace methods.
First we consider sparse linear systems from computational fluid dynamics (CFD) simulations. We evaluate and optimize the performance of Conjugate Gradient routines designed for GPU accelerator and compare against an industrial CPU-based implementation.
Then we show how the distributed parallel Algebraic Recursive Multilevel solver (pARMS) based on MPI can be adapted for heterogeneous CPU/GPU architectures. The preconditioning of each part of the distributed matrix (local preconditioning) is performed on a GPU and is based on the randomization of the last Schur complement system in the multilevel recursive process.
Contact:
Ken Hayami (hayami(at)nii.ac.jp)
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