[petsc-users] Building with MKL 10.3

[Jed Brown]

Matt, it makes sense for small subdomains in 3D with wide stencils. It's not
difficult to cut the memory by a third or so with 8 subdomains. Of course
you also need a preconditioner that makes sense on multicore and a threading
scheme with decent memory guarantees on NUMA.

On Mar 15, 2011 1:54 AM, "Matthew Knepley" <knepley at gmail.com> wrote:

On Mon, Mar 14, 2011 at 7:48 PM, Lisandro Dalcin <dalcinl at gmail.com> wrote:

>
> On 14 March 2011 20:48, Barry Smith <bsmith at mcs.anl.gov> wrote:
> >
> >  Eric,
> >
> >   With th...
I have never ever seen convincing evidence of this. First, you would need
enough bandwidth to satisfy
2+ cores. This is almost never the case. But suppose you do have this. Then
you would need a convincing
reason to use threads instead of MPI processes, which would mean data reuse.
But there is very little
reue here; it is mostly streaming.

   Matt


> --
>
>
> > Lisandro Dalcin
> > ---------------
> > CIMEC (INTEC/CONICET-UNL)
> > Predio CONICET-Santa Fe
> > Colecto...
>



-- 
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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