[petsc-dev] default SNES rtol for single precision builds

[Matthew Knepley]

On Mon, Sep 19, 2011 at 12:27 PM, Lisandro Dalcin <dalcinl at gmail.com> wrote:

> After debugging a failing petsc4py testcase using single precision
> builds, I realized the default SNES relative tolerance is 1e-8. What
> should we do?
>

In single, you can reach 1e-8, you just take more iterates since it looks
like
iterative refinement. I say we leave the tolerance where it is and make our
tests smarter.

   Matt


> --
> Lisandro Dalcin
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-- 
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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