[petsc-users] Memory usage during matrix factorization

[De Groof, Vincent Frans Maria]

Hi,


I'm investigating the performance of a few different direct solvers and I'd like to compare the memory requirements of the different solvers and orderings. I am especially interested in the memory usage necessary to store the factored matrix.

I experimented with the PetscMemoryGetCurrentUsage and PetscMemoryGetMaximumUsage before and after KSPSolve. But these seem to return the memory usage on 1 process and not the total memory usage. Is this correct? I also noticed that the difference in maximum memory usage is very small before and after KSPSolve. Does it register the memory usage in external packages?



thanks,
Vincent
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