[petsc-users] petsc __float128 krylov solver with mixed precision LU preconditioner

[Mark Adams]

I don't believe so. Not without extreme measures.

On Fri, Jan 7, 2022 at 8:39 AM Gong Ding <gongding at cn.cogenda.com> wrote:

> Dear All,
>
> I had a question. For petsc configured with 128bit float, Is it possible
> to use 64bit direct solver as mixed precision preconditioner for krylov
> subspace iterative method?
>
> If so , such as MUMPS or Pardiso can be used as efficient parallel LU preconditioner
> I think.
>
> Regards
>
> Gong Ding
>
>
>
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