On Nov 24, 2011, at 7:33 PM, Jed Brown wrote:
> On Thu, Nov 24, 2011 at 18:56, Matthew Knepley <knepley at gmail.com> wrote:
> I think the idea of a local point of view is fundamental, not just for
> parallelism. We use LocalToGlobal mappings in FS so that yu do not have
> to know about other fields, just the same as you should not have to know
> about other processes.
>
> I agree, local-to-global is the key to scalability. The challenge is making
> everything run along scalable pipes the way local-to-global does. I think we
> can do that with these primitives.
Jed,
I have no idea what you are talking about. What is "local to global" and
what are "these primitives"?
Example, how do I write a triangular solve using "local to global" and
"these primatives?
How do I write application of a stencil operator using "local to global"
and "these primatives?
How do I write sparse matrix vector product using "local to global" and
"these primatives?
etc etc
Barry
