>
>
> >
> > There error, flatlined or slightly diverging hypre solves, occurred even
> in flat MPI runs with openmp=1.
>
>   But the answers are wrong as soon as you turn on OpenMP?
>
>
No, that is the funny thing, the problem occurs with flat MPI, no OMP. Just
an openmp=1 build. I am trying to reproduce this with PETSc tests now.


>    Thanks
>
>     Barry
>
>
> >
> > We are going to test the Haswell nodes next.
> >
> > On Thu, Jan 25, 2018 at 4:16 PM, Mark Adams <mfad...@lbl.gov> wrote:
> > Baky (cc'ed) is getting a strange error on Cori/KNL at NERSC. Using
> maint it runs fine with -with-openmp=0, it runs fine with -with-openmp=1
> and gamg, but with hypre and -with-openmp=1, even running with flat MPI,
> the solver seems flatline (see attached and notice that the residual starts
> to creep after a few time steps).
> >
> > Maybe you can suggest a hypre test that I can run?
> >
>
>

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