[petsc-dev] question about Krylov solves, symmetric matrices, and ICC

[Jed Brown]

On Wed, Mar 6, 2013 at 10:05 AM, Paul Mullowney <paulm at txcorp.com> wrote:

> Understood. But, the petsc ILU storage for L and U is non traditional
>
> In ILU, all of L is stored and then U is stored. For U, the diagonal
> element of a row in U is placed at the end of each row (to get better cache
> performance in the solve).
>

This optimization is a relationship between L and U.

For Cholesky, there is only U.
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