GaspiLS – The GPI-2 based Sparse linear Solver library


Performance and scalability improvement achieved by GaspiLS in comparison to an original MPI implementation in an industrial CFD simulation. Shown is the scalability of the computation of a single PISO pressure correction step iteration on a grid with 1.1 million cells. The solver is a Jacobi preconditioned Conjugate Gradient method. In case of GaspiLS also the scalability on a bigger grid containing 7.8 million cells is shown. Architecture: Intel IvyBridge, two sockets per node, 10 cores per socket, Infiniband interconnect.


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