[petsc-users] Extracting data from a Petsc matrix

[hsahasra@purdue.edu]

Hi,

I am working on solving a system of linear equations with square matrix. I'm first factoring the matrix using LU decomposition.

I want to do the LU decomposition step using MAGMA on GPUs. MAGMA library implements LAPACK functions on a CPU+GPU based system.

So my question is, how do I extract the data from a Petsc Mat so that it can be sent to the dgetrf routine in MAGMA.

Is there any need for duplicating the data for this step?

Thanks!
Harshad

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