blocked index sets

[Barry Smith]

On Aug 27, 2008, at 10:23 AM, Matthew Knepley wrote:

> There is no concept of global for IS. They are purely serial. AO is  
> the only
> global construct with indices.

    This is kind of true, and maybe used to be completely true. But IS  
does
have a communicator and that communicator can be MPI_COMM_WORLD or
any parallel communicator.  In other words the IS is evolving to be an  
object
that can be parallel in the same sense as vecs or mats

    There are already ISGetSize() and ISGetLocalSize() so it sure  
makes sense
to have the same paradgm for the ISGetBlockSize().


    Barry

Originally IS had no parallel concept, then we added the ISGetSize/ 
LocalSize
but forgot to do it for the ISBlock...


>
>
>  Matt
>
> On Wed, Aug 27, 2008 at 10:09 AM, Lisandro Dalcin  
> <dalcinl at gmail.com> wrote:
>> I believe we have to review the interface of ISBlock. Currently,
>> ISBlockGetSize() return the number of LOCAL block indices. This is  
>> not
>> consistent with other naming conventions for getting local and glocal
>> sizes. I propose to change this to the following
>>
>> 1) change: ISBlockGetSize() returns the number global blocks
>> 2) addition:  ISBlockGetLocalSize() return the number of local blocks
>>
>> Comments?
>>
>>
>> --
>> Lisandro Dalcín
>> ---------------
>> Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
>> Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
>> Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
>> PTLC - Güemes 3450, (3000) Santa Fe, Argentina
>> Tel/Fax: +54-(0)342-451.1594
>>
>>
>
>
>
> -- 
> 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
>