[petsc-users] Requesting multi-GPUs

[Matthew Knepley]

On Wed, Sep 12, 2018 at 5:13 PM Manuel Valera <mvalera-w at sdsu.edu> wrote:

> Hello guys,
>
> I am working in a multi-gpu cluster and i want to request 2 or more GPUs,
> how can i do that from PETSc? evidently mpirun -n # is for requesting
> processors, but what if i want to use one mpi processor but several GPUs
> instead?
>

We do not do that. You would run the same number of MPI processes as GPUs.
Note that
you can have more than 1 MPI process on a processor.

  Matt


> Also, i understand the GPU handles the linear system solver, but what
> about the data management? can i do DMs for other than the linear solver
> using the GPUs
> ?
>
> Thanks once more,
>
>
>

-- 
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

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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