[petsc-users] Petsc with mumps single precision

[Matthew Knepley]

On Wed, Aug 20, 2014 at 7:53 AM, Sylvain Mercier <sylvainmercier85 at gmail.com
> wrote:

> Hi everyone,
>
> I'm using PETSc to solve saddle point systems. I have found a block
> preconditionner which requires to solve a smaller symmetric positive
> definite system. I do it with  MUMPS which is fast an robust.
> However, I would like to use this solver in single precision in order to
> compare the performances.
>
> So is it possible to use MUMPS in single precision inside a double
> precision solving with PETSc?
>

No, right now PETSc must have all the same precision. We have investigated
several methods for
using multi-precision, but none has satisfied all our needs.

  Thanks,

     Matt


> Thanks,
> Sylvain
>



-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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